What aftermarket diff cover guys don't tell you!

[@davestaco]

The glass actually improves the oil flow. It eliminates the horizontal fins that were cast inside.

[@bankspower]

The ribbed cover shown at the beginning of the video is made by PPE. The cover tested on the truck was a Mag-Hytec. The goal for any diff cover is not to stop the oil from going over with the ring gear. The goal is to encourage MORE oil to flow over the ring gear. The PPE on the right would impede the flow and severely aerate the oil. Think of a rocky waterfall. The water is white because of aeration. Air is not a good lubricator.

[@dominicjose3660]

Yeah that's what I was thinking too.🤭

[@dyslexofficial2798]

@@janofb my thoughts exactly

[@bobody6258]

@janofb - agreed, obviously curved veins have an advantage, however, straight veins will function to channel fluid. Completely missed in this video. I’d love to see projectfarm do a test. He takes great care to reproduce accurate results and more importantly admits when he can’t. Unlike this guy... all I can say is flawed logic.

[@davestaco]

@@bankspower Some Sterlings came factory with aluminum externally finned covers. How do they perform compared to the factoy steel covers?

[@600zxr]

I want to see the fluid flow through transparent versions of the Banks and stock.

[@moisty254]

100%. I'm not taking this video seriously until they do.

[@nolan9101]

I’m with you on that. I mean it seems to provide good numbers, but I’m not certain that the visual differences between the two while transparent would be very different. I’d imagine they would both have a lot of aeration, whereas this guy seemed to think any aeration was a death sentence for the diff.

[@dustinsmcgill8233]

That would be counter productive to his sales pitch, only one reason why he didn't, because they both probably look the same

[@greyhuntley9737]

The difference is that the afe cover was already flat. Putting a piece of glass over the banks cover or a stock cover converts it from a curved cover to a flat cover, which would make a demonstration nearly identical. It think the point of the video was to demonstrate the difference in fluid dynamics between flat and curved diff covers. They could mold an acrylic copy of their model and show that but the visibility would not be great as the curves would distort the light.

[@nolan9101]

@@greyhuntley9737 He was focusing on things that you could observe regardless of distortion- such as the aeration. He really didn’t like seeing aeration, but his would most definitely show plenty of aeration, too.

[@-DC-]

It's almost like the OEM'S actually know what they are doing 🤣, who'd a thunk it 🤷. Great video.

[@norman_sage2528]

Makes you step back everytime you see something new for sale on the market.

[@BrodeyDoverosx]

If they can’t prove their claims, it isn’t worth your money.

[@kleetus92]

Especially since some of the OEM units like the F450 come with an aluminum cover on it already!

[@kleetus92]

@Dave Mitchell hard to say, but if they aren't failing, it can't be that big of a problem.

[@dylanshandley1246]

@@kleetus92 well, not necessarily. Just because a product isn’t breaking, that doesn’t mean that there isn’t more performance they can gain or that it’s lasting as long as it should or something else like that.

[@Dogslovetrucks]

OR... you could just keep a stock cover and change the lube at recommended intervals

[@ziggarot]

This is a good option for people who are for example hot shots. You want your work truck to last 500k+ miles. That initial investment would mean the lubricant stays cooler relative to stock which results in less wear on the actual dif. This is a good investment for people who use their trucks to make money rather than regular Joes. A dif job is very expensive and if you can get more out of the dif then that's a win.

[@nooneeyeno]

@@ziggarot Banks found a solution for a problem that doesn't really exist. Use premium oil and change it regularly. Don't misunderstand me. Diff's could fail from time to time. At 500k,, about 3 to 4 years. Your diff should be the least of your problems because your truck will be at the end of its profitable life. I know drivers that put much more than 500k on their trucks but things just eventually wear out and must be replaced or rebuilt meaning your allotment for maintenance ( maintenance allocation) will be cost prohibitive.. More down time, less profit.

[@mikeicee]

@@ziggarot By the time the differential wears out you the Truck will be old enough to get a differential from pick n pull.

[@angusbeef524]

I’ll keep my stock one, it doesn’t fill up with mud or break when I back into a rock. I’ve been 4X’n hard for 40+years in the outback of Alaska.The stock one can be beat straight with a hammer and re-welded in the field. No replacement

[@alaskanken2132]

@@angusbeef524 Alaska minds think alike just spring breakup would pack that air defuser much less one trip out to Jim Creek.

[@nateross14]

A couple things to consider.... First, you don't need oil dumping on the ring and pinion gears contact point. You only need a tiny bit of oil between steel on steel contact points for lubrication. As long as the steel doesn't go dry, your fine. Just the ring gear dragging through the oil is sufficient lubrication for both the ring AND pinion. Second, you don't need oil dumping on top of the bearings either, you just need the bottom portion of ths bearings submerged in oil and then the rotating bearings will drag oil up around the rest of the bearing. So as long as your oil level is high enough it doesnt matter what the splash pattern inside the diff is. We're dealing with heat hardened bearings and gears, heat buildup is a non issue. I've never seen smoking oil coming out of a properly functioning diff. Air in the fluid and heating up is a sales gimmick. If heat buildup was a danger you'd see smoke pouring out the breather tube from burning oil. It doesn't. Aftermarket diff covers are a gimmick. Keeping your diff oil at the proper level, and change it a proper intervals is the only thing you need to do to your diffs.

[@MavHunter20XX]

And change it more frequently the harder you work your truck.

[@fuct2003]

Not a mechanic, but used to be an Engineer. Your comment, does make sense. There was nothing wrong with the fluid dynamics he showed. Air is an insulator, yes. It's a moment of aeration. The air bubbles will expand, and pop, and because of the viscosity the bubble popping would provide sufficient lubrication. His aerodynamic chart is fairly accurate. That makes scientific sense. His analysis on fluid mechanics is way off.

[@UndefinedStasis]

​​​@@fuct2003 I haven't watched the full video yet but, I can already tell you that he's way off. He honed the baffling system away. Also I wouldn't be suprised if he only put in the oem recommendation towards diff oil. Most diff covers allott for more fluid, more fluid more cooling, as long as the circulation(baffling) is working. Machining that baffling out, replacing it with a clear cover, eliminates that aspect. I will omit that many aftermarket diff covers are worse. However, just as many aren't; look towards aftermarket oil pans with baffling on wrx's. Once you go on track, experiencing any type of g-force, and the baffling comes into major effect; the oem system is known to cause oil starvation.Fa20's, egs, boxers(in general) etc are known for blowing up on track due to their non-baffled oil pans. I have a degree in finance and a minor economics, not a professional by any means but, I have an affinity towards cars and mechanics and have done basically any and every modification on my, my brothers, friends or families cars.

[@SmothersSawShop]

@@UndefinedStasis you should’ve watched the whole video because he did just that and added more fluid

[@maxdm1583]

I couldn't agree more!

[@asherdie]

When do we get to see a clear version of the Banks cover in operation?

[@TakushiMotors808]

I’m pretty sure they showed that when they were doing the GM/Ram diff cover testing. The GM and ram trucks use a different axle then the Ford does.

[@asherdie]

@@TakushiMotors808 no they didn't.

[@piettskiett9123]

Corporate bullshit clear cover the banks one also yes

[@JasonH17]

So much for a comparison. Does it matter if both after markets cool better than oem and oem is the standard for warranty.

[@felixcat9318]

I'd noticed the absence of their own clear model in the test, too! To be completely fair, it should have been included and viewers may draw their own conclusions as to why it was omitted...

[@precisiondiesel225]

This man is a legend. Not many manufacturers do the intense, real world, common sense rnd, like Banks.

[@wannabecarguy]

Not buying it. Think about a motorcycle engine that shares oil with the transmission. It works.

[@court2379]

The engineer designing the gearbox didn't just WAG it. It was studied. The only issue I could see is that the automakers are optimizing for cost, not necessary longevity. So once they hit a certain longevity number the rest of the design is reducing cost.

[@life_of_riley88]

This is a joke. Oil is everywhere in a rear end, and there is WAY MORE than enough on ALL the bearings. All you need is a thin film to lubricate these components.

[@randymarsh5088]

@@life_of_riley88 don’t be a simp keyboard warrior . The molecular properties of the oil are compromised by excessive aeration and increased operation temperature . Enough doesn’t always mean exactly enough . Keep taking your ridgeline to wal mart for service .

[@life_of_riley88]

@@randymarsh5088 Ha. Okay buddy, a lifetime of building performance cars, race cars, hot rods, and the vehicles that tow them will just be cast aside for your highness. I've been there and done that with this stuff, although all this differential cover stuff is like throwing $ down a hole. Factory diff covers work fine and just like steel wheels are just as round as aftermarket ones, I'll just use what was designed for the axle by the manufacturer.

[@brian_dc2]

oem always knows best! thanks Banks for being one of those companies that go out of the way for proper R&D for a functioning product, and going the extra mile to show your findings to the community! You guys found yourselves another customer!

[@bankspower]

You bet, thank you for watching.

[@banjominer9682]

so banks improved on a 60yr old plan??? doubt it highly

[@saxplayingcompnerd]

OEM does what is CHEAP.

[@2slofouru]

Oem knows cheapest. They want customers to neglect maintenance because of the lack of a drain plug...job security.

[@raymondclass6794]

@@saxplayingcompnerdit's giving military grade

[@imderrickjed]

As a mechanical Engineer I can tell you NOBODY at least today designs these based on fluid dynamics or anything like that. We design a small footprint cover and and contours are there for clearance. These gears are swimming in fluid and are fully covered with they come in contact with each other. A very small portion of the gear is outside the fluid for a fraction of a second when driving and again is fully submerged when making contact again. Most internal features on the covers including aftermarket serve little to no purpose except to make claims to justify their price point. In the end most Engineers and real car guys know that rear ends fail because of abuse or cheap aftermarket gears. You can pull a junk yard rear end out of a 1978 chevy truck and run it down the road for years. Its not until you drop in a 900HP engine that you run into issues. Anyone can sell you on "fluid dynamics" or cross contamination of fluids, but real world applications have shown us that failures rarely happen without a major problem.

[@xxRamD3yruxx]

I think the funniest thing about this product isn't the fact it was made to solve a somewhat trivial problem, which it does. It's the fact Banks made his own because of how bad the flatbacks are at fluid dynamics and how bad that erks him. I genuinely don't think he cares if he sells many of these, i think he made a product just to show how stupid the competitors was. I can get behind that, still doesn't mean ill buy one 😂

[@willybman3723]

Exactly...he's acting like it's water or something. Everyone, your diff is fine

[@SmileyDave-h5z]

@@xxRamD3yruxx Race differentials are usually dana positraction units. These use a carrier one piece unit installed from the front. The rear side? It's completely flat and round, both inside and out. They use them on NASCAR cars, no baffles. The gears draw the gear oil up from the bottom because they are sitting in it. Internal baffles slow the oil from getting back down to the bottom where it needs to be for the gears to use it. If your worried about heat just use better oil the gears dont care they can run at temps over a thousand its the oil that breaks down. Gears break from force and horsepower and broken cooked lubricant.

[@nicksalazar5873]

I mean i would trust banks more than the comments here

[@coleramus561]

I just watched a 13-minute infomercial

[@lawrenceproctor8613]

Same but I learnt something about diff covers affecting gear lubrication

[@aaronbigleman7326]

It’s a company that makes automotive parts. What were you expecting? They aren’t in the business of doing product reviews.

[@gitknownmedia3655]

@@aaronbigleman7326 yes ^ this is his specialty and it teaches you FEA and engineering.

[@billymanilli]

lmfao

[@doctordifferentialspeedsho9506]

This information is absolutely gold. I can not begin to tell you how many aftermarket covers have caused gear failures. Actually we will not offer a warranty on a diff with an aftermarket cover. I’ve been saying for years they don’t offer a single benefit. I own a shop that we build differentials daily. Please let me know how to begin selling your products as a dealer!! We will sell a bunch.

[@bankspower]

To become a dealer, click this link: official.bankspower.com/become-a-dealer/

[@doctordifferentialspeedsho9506]

@@bankspower i filled it all out. I hope you got it. After i answered the 2 security pictures it just went to the main screen. So i guess if i don’t get an email sooner or later I’ll just apply again. Thank you for the help!

[@techbilly119]

How about making a clear version of the banks cover, so we get to see how it flows... A REAL side by side comparison.

[@homerfry9234]

Fins are in the back of the cover, you cut the fins there is nothing to look at

[@davidmoore8741]

Already did

[@CalebBaker500]

@@homerfry9234 they could still make a clear cover with fins to prove a point. Not like they have to use the same method to cut open the cover like they did with the flat back.

[@jaydunbar7538]

Ask and you shall receive, just go back and watch the full series on building it.

[@l...]

kzbin.info/www/bejne/b17ceGZ6aK91iNU

[@JordanTheMann]

First he tells me aftermarket diff covers are a scam and then he tries to sell me one 😂

[@evoemperor3776]

That is because aftermarket diff covers have cooling fins. Banks just pointed out flat covers are pointless.

[@ccubsfan94]

Because his cover has the benefits of more cooling while still retaining the stock lubrication over the ring gear.

[@phenry5083]

@@oldcountryman2795 talking out of your ass i see

[@Kevin-dt9xm]

flatbacks ruin the fluid dynamics of the diff, and the fins on the inside can change them too. the one he was saying was better has the same internal shape as the stock, so similar fluid dynamics, still has fins but theyre much more subtle, but it has the added benefit of the cooling fins on the outside.

[@fusionsportdaily1650]

If you paid attention you would've known why. But it sounds like you're 200% dense.

[@HondaRedneck16]

This guy has so much beef with diff covers I love it

[@sauercrowder]

Because he's selling his own diff cover

[@haikudragon1002]

Lmfao

[@donaldb3628]

This is a total "Parlor Trick"! He should have a side show at the carnival!

[@sc_mastertech8641]

I love the engineering that went into your design. It all makes sense and is easy to understand. I also understand as a company why this has all been done on 3/4 and 1 ton trucks, but this would be equally useful for those of us with 1/2 ton trucks. I certainly don’t overload my 1/2 ton but would love to see this available for some popular smaller axles. Hope that becomes a reality, I’ll gladly step up and buy one.

[@noone42069]

I agree! Would also love front covers for 4x4s!

[@MyLonewolf25]

Definitely would love to see one on a 8.8! Dif temp is a huge thing for racers as it can fuck with LSDs so something like this would be great

[@mesanders1113]

Id buy one for both my 1/2 ton trucks

[@chester8420]

Why? Has your diff been overheating and locking up? This is a solution in search of a problem!

[@javiermartinez242]

It's been a year since this video, I just called today and they're still not producing this product for 1/2 ton trucks. I'd buy one if they would make it for the super 8.8 ford. What a bummer 😕

[@robertmoulton2656]

How well does it cool after dragging that fancy cover through the mud to load cattle.

[@mesanders1113]

A actual legitimate question. I bet playing u boat captain would clean it out. At the very least you would still have oem equivalent cooling.

[@alouisschafer7212]

It would certainly not perform worse than an OEM Cover.

[@robertmoulton2656]

@@alouisschafer7212 indeed, true enough. But if you actually need the extra cooling..... If not save your $ leave the factory cover on

[@JasonH17]

Wouldn't it push air flow futher out? Now it has to go over mud filled baffles.

[@alouisschafer7212]

@@mybossisdrunk people who get this cover are not going to put in on a mudbogger. I hope...

[@lakeschoolrestorationchann1567]

I like when companies call out other companies by name without bs. Seems like a solid product that works, what more can you ask for 👍🏻

[@T.Hizzle]

An apple to apple comparison. He doesn't have a cut away of his next level game changing bullshit.

[@workct4102]

Just his own bias

[@T.Hizzle]

@@workct4102 Exactly. Why you don't see a cutaway of his game changing $1000 diff cover

[@williamscanlan9681]

I haven't priced out the Banks cover yet, but the time savings from having the drain plug (magnetic at that) is VERY valuable in my opinion. That would make changing the oil about a 10 minute project.

[@valis992000]

I am so glad I found this channel, I am always arguing people and saying "You know these things were designed by engineers that spent their entire life learning how to design machinery. Why do you think something a guy threw together in his garage is somehow better?" and everyone gets mad at me.

[@HoosierDaddy_]

I can't get over having those horizontal fins on the inside of that flat back cover. I watched all of these previous videos and have to say I'm impressed with Banks commitment to find the true nature of diff fluid flow.

[@supertruckertom]

Gale is an inspiration. When you love what you're doing, it isn't work you want to retire from.

[@cayman9873]

I went with a ford stock diff cover. And change gear oil every other year. That has worked very well for me. I use mobil 1 full synthetic gear lube

[@Lestergreen77]

Mobil 1 is shit

[@simondale3980]

Good idea! Looks to me from the testing done in this video, there is nothing wrong with the stock one.

[@chriselliott8509]

@@Lestergreen77 prove it

[@Lestergreen77]

@@chriselliott8509 send me your email and I’ll send you a link of my oil analysis of their annual protection oil epically failing at 11k miles

[@chriselliott8509]

I'm curious. I've never thought once a year oil changes were a good idea anyway. I'd like to see the data.

[@johntarver5684]

It’s 5am, I don’t even own a truck, and I’m watching this. 😂

[@majortom4543]

i seek help i have to

[@whiteymccluck5411]

I started off thinking I was watching a mechanic show what not to do. Only in the last couple minutes did I realize it’s a 13 minute commercial for his patented diff cover.

[@tcap7917]

Back in the 70-80s every kid wanted a chrome diff cover. We informed them of the consquences but they didnt care. We did a lot of inner and outter axel and pinion bearings...and they still wanted those covers reinstalled.

[@SmileyDave-h5z]

Really? Because I ran Mopar and we were stuck with that flat oval rounded factory diff cover, better known as a Dana "pumpkin". No baffles inside or out. Just a smooth interior surface so the gear oil had nothing to stop it from getting back down to the bottom of the diff where it was needed. This guy is gaslighting everybody. The kids were wearing the bearing because they had hi output engines and stock diffs.

[@sultankuto8724]

Now here is a man who loves his job and knows what he's talking about.

[@ferrumignis]

No, here is a man that is trying to sell you his product. Why are people so guilible?

[@sultankuto8724]

@@ferrumignis yeah true I know he's trying to sell his product,who wouldn't?giving him credit for taking time to do the research and also do detailed comparison.

[@SmileyDave-h5z]

@@sultankuto8724 I give him credit for gaslighting you and you buying into it.

[@AliTheGreatest-DnMe]

What about mud getting inside the Ram-Air scoop, I think the stock diff cover is good enough.

[@alouisschafer7212]

You can just wash the diff cover clean with a hose or a pressure washer.

[@AliTheGreatest-DnMe]

@@alouisschafer7212 what about when you are in a remote area having fun with you truck in the mud and the vents are closed with mud, it will not be useful 🤔.

[@brianstallard5446]

@@AliTheGreatest-DnMe Even caked with mud, it's still aluminum. Aluminum tranfers heat way better than the stamped steel stock cover.

[@AliTheGreatest-DnMe]

@@brianstallard5446 ok

[@alouisschafer7212]

@@mybossisdrunk no... Just a way to kerp it clean should somebody have this cover on a truck that sees rough terrain and mud. Its certainly not meant for that application. This diff cover only makes sense in a performance build truck that sees a lot of sustained full throtte loads like racing or towing.

[@MrYetti]

I work as a diesel tech in a smaller shop that also does a lot of aftermarket performance work. I can say that I have seen these “flat back boys” running on hot shot drivers with trucks with hundreds of thousands of miles and I guarantee they haven’t changed the diff oil or even checked the level and they are running just fine… you don’t need a hose of oil showering the diff from the top down, as long as you have the proper amount where the bottom of the gear will simply soak in it and drag it up on itself, you are good to go…

[@locker1325]

I think with his resources he could form a plexiglass differential cover like the stock and like his company's product to show the apparent difference in the oil flow

[@Thatdavemarsh]

You’re a smart man. You know temperature percentages or times reduction need to be from absolute zero. Nice cooking regardless. I guess you have to clear it of dirt mud and snow from time to time.

[@duane8620]

Love it, absolutely amazing video. Mr. Banks, I truly love the way you lay down that Knowledge Hammer! When there's an import piece of info/consumers being misguided (like flat back covers) or odd industry standards that degrade performance/longevity of our vehicles you NEVER hold back and I thank you!

[@cyrusumberger5285]

I’ll look into it when Semi’s start using finned housing covers!!👌😉

[@busmekanx]

I've seen some with a pump and external cooler

[@SmileyDave-h5z]

@@busmekanx nascar uses that.

[@SmileyDave-h5z]

you want the inside to be smooth so the oil can get back down to the bottom as fast as possible to be available for the gears to pick it up again. These guys are gasligting everybody. nascar posi unit diffs are smooth inside and out.

[@jakem117]

You're a hero sir. Thank you so much for exposing this to the public. Really, words can't describe my appreciation. Manufacturers should be called out on "snake oil" products whenever they are caught.

[@edsmith4414]

WOW.....JUST WOW !!!!!! Got to be the best video I've ever seen on KZbin bar none !!!!!! IF there were an Academy Award for YT, this would win. Having had the stock POS cover on my 2003 Silverado 2500 HD RUST OUT some years ago....and I mean you could stick a screwdriver in it and flake metal hunks off.....and of course, ruin the differential...I found this to be AMAZING. You sold me brother...... I'm ordering one TODAY.

[@evergreatest7644]

So we are going to ignore that this is basically an advertisement for banks diff covers ? (No offense, I found it very educational)

[@hotrodray6802]

Silence Banks. Stop free speech. Or You stop watching people developing products.

[@jamespooley6626]

Have any of the manufacturers of these other covers tried to sue you guys yet for exposing their junk products?

[@bankspower]

The fact that not a single company has even picked up the phone to call us says all there is to say.

[@Powertampa]

@@bankspower If they ever do, please let us know, because that lawsuit would be prime popcorn material!

[@Sandman1832]

The only way that they could sue Banks is if he copies their design to a T and rebrands it under their name. You can't sue someone for making a better product with a superior design and comparing it to other brands in real time. If that was the case and people could sue over that, there would be a monopoly on products. What Banks is doing is absolutely brilliant. There is nothing wrong with exposing and pissing off people who sell snake oil haha.

[@FishFind3000]

@@Sandman1832 they could sue for defamation. But since everything banks does is backup with clear data there’s no lying done.

[@Powertampa]

@@Sandman1832 Well these videos could be, in the eyes of a bored lawyer, seen as way to make their products look bad, so they could sue for that. Though some states would pretty much immediately throw it out as frivolous. Also reflects bad if your response to criticism is to sue your competition, but you never know how people are.

[@aflacduck2]

Definitely a great video. I would like to point out some things though. I think the flat stuff is even worse than you are demonstrating. There are horizontal "cooling fins" on the inside that are likely to make the aeration worse. Simply gluing some make shift ones on would have shown just how much worse it really is. Another thing I think would also help is you only have 1 wheel being spun the whole time. This is naturally changing which gears inside the diff are spinning at what rates and affecting the flow. Locking the diff would help better show what is happening with the flow, though maybe not by much anyway.

[@jwhiterhd7847]

I’m not in the market for a diff cover, but I sure can appreciate the genuine effort you guys went through to do an honest test and showcase your brilliant engineering. There’s a reason you guys are the best in the business👍🏼

[@derekfoehr9264]

I have been waiting for 2 to 3 years for Banks to come out with one of these for my 97 Dodge 2500 5.9L but it still isn't available yet.

[@kevinbarry71]

How dare you bring actual facts to the world of after market pickup truck products. You're going to offend a lot of guys who wear a lot of flannel and who cannot do algebra

[@bmstylee]

That's it. I'm offended. I suck at algebra.

[@jmicm13]

And how dare you speak ill of Al Borland's choice of shirt!

[@bmstylee]

@@jmicm13 Al Borland. A man of culture I see.

[@dposcuro]

I can't do algebra either, but I am willing to listen to those who can.

[@cccpkingu]

You doubled up on the "who".

[@JordanTheMann]

Moral of the story? Don’t waste your money on buying aftermarket diff covers. The factory ones work just fine!

[@The_Opinion_of_Matt]

I agree the factory cover will work fine for the vast majority of us. For the people Hot shot hauling, or car haulers, or just the average person with a big heavy camper or race car trailer the Banks Diff cover is probably the only one worth getting over the stock cover.

[@bankspower]

Jordan, thanks for taking the time to watch. We aren't trying to reinvent the wheel, that's an age-old argument. Everything can be improved. Ford didn't stop developing innovating with the F-150 after it launched in 1948. If want, check out our full breakdown of all the data and comparisons with our series that showcases the diff cover development. Watch here: kzbin.info/aero/PLwtmrqcWzLtQR9riOg8mizIEj-UX4WBBm

[@kaleyfantastic]

i dont even own a truck but im glad people like you are making things that actually make things better instead of just making them look "custom". great work.

[@jamesjohnson6239]

02 f150 260 thousand miles stock differential, I dont see myself ever purchasing one of these covers . I do however have a fake hoodscooop and that adds 38 hp over stock and gets me mad respect!!

[@SmileyDave-h5z]

I added 50HP to my truck when I put some flame stickers on the sides of the fenders!

[@terrykohrt5643]

How about a test showing the internal flow of the banks with a clear cover???

[@haydenp9254]

Looks like a good diff cover. The only problem I can see happening is the ram air vents getting plugged with mud and rocks driving down a wet gravel road. I think the fins you’ve put inside the cover do more cooling than the ram air idea. I’m sure it works great on the highway in California. Would be really interested in a cover like you’ve got but without the ram air scoops.

[@jamesglenn520]

The cover is designed for heavy working loaded or towing trucks on the highway. Not for Offroad applications.

[@FloorItDuh]

I've called aftermarket diff covers vanity covers for the same reasons you pointed out. Well designed product. I'll have to pick one up.

[@matekochkoch]

I would be interested to see how the different covers perform in their real form. It might be possible to make a copy from clear cast resin.

[@AxleRods]

Im so glad man shows us exactly why his parts are far superior than the trends. My first diesel was a duramax with banks parts on it and theyre really good quality. Ive driven other duramaxs and mine just seems smooth compared to everything else. But really as a mechanic myself, these videos are better than most of my schooling ever taught me.

[@mikebavoso26]

I was thinking of purchasing one of those flat covers and adding more fluid until I saw this video and a previous Banks video, this is one smart man

[@KingCommander1000]

Wow really interesting never thought of this great video! The best part was "the fluid dynamics is so effed up". 🤣

[@ranrun3643]

This is not at all what is thought in mechanical engeenering. First as long the tangetial speed of the crown gear is not greater than 15 m/s (50 ft/s) oil is not completly thrown off the gear. So the oil gets to the contact area. More oil at the contact area means not that there is less wear, because it is just important to provide a layer to hold the gears from direct contact. This provides a oil film of the thikness of hair as good as thicker layer. Air bubbles can not form in a thin layer of oil. Foaming is a problem, because foam is a good heat insulator and can lead to overheating. Second more oil has a reason. With more oil the bearing balls / rollers were also standing in the oil. That is determinig the fluid hight. Would the bearings not be there the oil would just have to so high that it covers the lowest teeth. Further small pieces of metal are always going to land in the oil. When you have more oil you can take more metal particls before having a "grinding fluid".Third The low pressure zone does not mean there is high flow of air. On the contrary the air is gliding over the low pressure zone. The same mechanism why airplanes stall at to high of a speed. I would like to see a longer testing period. 700 seconds is not very much. A 10 hours graph while driving trough various environments with and without your cover would be more represanting. But you know that too.

[@ils360]

Once again I wish they would make these diff covers for the older dodges.... I've been waiting and messaging since these came out and I keep being told the same thing that they will be made and yet I have to see one...

[@fredygump5578]

Patience grasshopper! Product development takes a lot of time. I am impressed that they have accomplished as much as they have since they released the first video on the subject.

[@jaydunbar7538]

Your in a limited part of the market, get used to waiting for new tech.

[@guidosaur7506]

This whole series took a super long time. I'm sure they're gonna focus on big money trucks before they go to less popular ones

[@ils360]

@@guidosaur7506 I definitely wouldn't say they're less popular but they're not the brand new trucks everybody's buying... 01 Dodge Cummins is it definitely a popular truck just not something that the market and development team is probably going after first

[@ils360]

@@jaydunbar7538 how am I in a limited part of the market?

[@VinylToVideo]

Great to see Gale Banks still involved.. he loves what he does! If they made one for my '94 Chevrolet C2500 I'd buy it!

[@monteclark1115]

I have a mag Hytec on my 2001 suburban 1500. Filled it with royal purple 75-90 and drove from Louisiana to California in late June along interstate 10 then took interstate 5 to Stockton. Drove around 70-80 mph most of the time. It’s still in one piece.

[@nukenvy2]

By removing the support /cooling ribs I think you might have improved their design. I would like see a version with the bars intact or accurately modeled with plastic cross bars.

[@Morpheas001]

That ribbed one was a different cover from the Mag-Hytec

[@2stroke540]

"I don't think any oil is getting to the pinion!" nice try. Just because all you can see is the splash, don't mean there is some magical pocket of air in there not getting any oil. Oil is absolutely traveling to the pinion. Not near as good as factory, or supposedly the banks, but it's there. Another sales pitch.

[@craigquann]

True... but is it enough tho? Ever wonder why guys lose rear ends in their vehicles?

[@life_of_riley88]

@@craigquann Yes, it's more than enough. All you need is a THIN FILM of oil on these components. There is SO MUCH oil in a rear end, this explanation is really really silly.

[@buttergeneral3488]

@@life_of_riley88 Its about efficiency. You want the oil to hold a circle shape. More efficient means cooler temps which means less friction. The round cover also has more surface area and has the oil efficiently travels along the cover. It transfers heat to the cover better because of the added surface area of the round cover.

[@buttergeneral3488]

Many people loose their diff because of overheated oil. Overheated oil has worse lubricate and allows for the gears to heat up more which causes the oil to burn more and screw the diff even more because the metal in the diff starts to expand which messes with the tight clearances of the friction plates and gears

[@W--ko9ms]

Of course there is oil getting to the pinion, it's just hotter. Long term wear is the point he's making.

[@chucksmoko5348]

Looks like he’s close hitting his shoulder in that right rear spinning rotor. He was up to 70 or so mph.

[@f.hennemeier934]

I think its looks worse than it is because of the camera angle, still not safe. If his shoulder would hit that brake disk at that speed it s gonna causa a lot of damage. Not even flex tape is gonna fix that 😂

[@authorizedanglertv2988]

Mr. Banks, I hope this comment reaches you... I avidly off-road my 2011 ram 2500 4x4. I appreciate your research and development on your Ram Air cover. One thing I haven't seen discussed is the overall strength of this as protective armor during activities in the rocks. I would love to see a product for us wheelers, with Cummins' and Power Wagons. We do tend to bang up front AND rear covers on rocks. Sometimes rocks aren't avoidable, and the stock covers peel- off easily. Most wheelers would buy a welded steel plate cover, which I would assume by your tests, would not provide any benefit other than protection from rocks. I am worried that if I purchase a Ram Air diff cover, that I will be MORE likely to cause damage due to the ram air scoops. Furthermore, reversing into rocks is also a concern, as this cover is aluminum, most 4x4 enthusiasts do not have a welder on board to repair aluminum on the trail if it's damaged by a rock. Thank you.

[@David-cy2ug]

I had similar concerns. Those ram air corners are asking to get snagged and ripped off it looks like or I would have purchased this cover..

[@Keith_Mikell]

The master at work. Love your videos. Keep them up. You are good behind the mic and good at explaining stuff to people who may not know whats up. Much love, Gale.

[@bankspower]

Much appreciated! Stay tuned for more action.

[@dank1349]

He defeated the purpose of his initial complaint. THE FINS INSIDE THE COVER. He cut them off and and replaced with a plexiglass cover

[@declanthiele]

Not really, the flow dynamics are screwed with the horizontal fins much more than a flat back like this glass.

[@mikkosha]

I’d imagine that cooling performance of a ribbed design is also dependent on how clean the cover is. Once they get caked in mud and grime the cooling effect they had will become greatly diminished. I think the reasons OEMs stick with smooth covers is that most people don’t clean their differentials and dirt and grime have less nooks and crannies to stick to. Hence the covers stay reasonable clean to do what’s necessary to keep the differential alive.

[@lousypirate]

If the OEMs felt like they needed to pay the extra price for cooling, they would have. The life expectancy of a rear axle now is such that you'll have sent that truck down the road long before it develops a significant problem. How many people run 100s of thousands of miles before even bothering to change fluid?

[@41dodgee300]

OEM doesn't care about cooling as much as bottom line - how much does it cost and how can we make it cheaper!! Thus these covers are stamped steel!!!

[@mikkosha]

@@41dodgee300 they care about as much in that they need it to last as long as the car can be expected to live. Like you’ll get a certain amount of miles as a goal and a load that it’s supposed to handle for that time and then you go to town designing or selecting the right differential to reach that goal. This is fine as long as you don’t ask the car to do more than that.

[@sebbekartellen6493]

”Aftermarket diff cover guys” damn there are really people for everything

[@anthonyhitchings1051]

running the stock OEM diff cover on my 5th Jeep - a Jeep Liberty - it works just fine, and has never been a problem off-road

[@thomasbaiza6738]

Well i just watched this and while it makes sense on the surface, I have a 99 F250 with a Mag-Hytec on it for the last 12 years and 200k miles. I run royal purple 75w140 and have towed a 15k lb 5th wheel all over the country in 110 degree heat in Arizona, -30 degree weather in Wyoming, and everything in between. Every time I change the gear oil it checks fine. This cover might be better, but I don't think it really matters.

[@ivancorey7389]

This is fairly interesting, but I change the diff covers for rock protection.

[@anthony1930]

What about salt/snow/dirt buildup in the “ram-air” intakes

[@FishFind3000]

Good idea.

[@CalebBaker500]

Even with buildup the banks design would be superior to the flat back design due to fluid dynamics alone. Plus I assume buildup in that area would be low since it's in a relatively protected area.

[@Gravstein]

Dont think it will be that big of a problem, snow melts as the diff warms up. You can get the cover in powdercoated finish. Look at Bmw M cars, they have the same type of design and for over 30 years.

[@FishFind3000]

@@Gravstein but bmws design doesn't have channels that flow up bmws have fins that extend down where air and debris can pass through.

[@OverKillPlusOne]

I’ve had issues with snow in my 2011 dodge 6.7L cummins. Sometimes we get deep powdery snow here and you have to go at it with momentum to bulldog through...unfortunately it also stirs up and sucks that into the stock air box.

[@ZEPRATGERNODT]

Best Infomercial so far!

[@Fun-under-the-hood]

Holy crap. I'm not one for falling for stuff but you got me sold on that. That's genius

[@Jesse-fz8pu]

I had my 2001 silverado for 20 years 300,000 miles only. I change rear oil very five years never had a problem. Same cover...

[@boodro2122]

I just want to take time to appreciate the skill of that machinest. Top notch quality! Wow!

[@fredkenney9906]

I’d like to see a banks transmission pan design !!

[@mikeyhue2437]

I second that.

[@alouisschafer7212]

Oh yes.

[@TheMoody876]

Wasn't this same video posted months ago?

[@CalebBaker500]

I think the only difference is the last thirty seconds where they have actual data rather than just some visuals.

[@hardmack]

Banks is still running a business.....

[@TheMoody876]

@@hardmack that has nothing to do with posting a video 2x

[@ralfie8801]

It was for GM/Dodge diffs, this one is a different design for a Ford, so no, with a little yes in there too.

[@keyman5700]

I just installed my banks cover on my 2001 ford excursion 6.8 thanks for making a great product install was super fast and easy do you make one for 2016 nissan titan xd 5.0 Cummins thanks

[@MarkPappenheim]

Gales analysis makes perfect sense to me as a ex ford SD owner I had the bearings fail in my 10.5 Sterling an rebuilt the whole rearend an put a mag hytech cover on it an it repeatedly boiled the syn 85 140 out thru the vent hose. Trucks gone not my problem anymore

[@FishFind3000]

It would be cool if you could make a commercially viable clear diff cover.

[@l...]

kzbin.info/aero/PLwtmrqcWzLtQR9riOg8mizIEj-UX4WBBm

[@FishFind3000]

@@l... I want to see banks cover clear not the competition

[@mattinummela4838]

@@FishFind3000 kzbin.info/www/bejne/b17ceGZ6aK91iNU already did one

[@geraldkoch394]

I always thought the flat covers look cool, I’m so glad that I never got one. Thanks so much

[@miguelmaldonado9881]

IM PRETTY SURE EVERYTHING GETS LUBED !

[@nsa1341]

Yeah like the gear is spinning through some lube so all the gear is getting lubed then the bumps on the road toss lube ever-where too. If the flat backs didn’t work then they wouldn’t be sold.

[@heres.ray64]

Honestly yea, but the air that gets into the lubed is gonna be way higher with a flat back, also, his the cooling of his is pretty dope

[@stevemoore1148]

Hey look, a solution to a problem that doesn't exist! Great job Gale

[@Gatekeeper-p6g]

To Mr Gale Banks thanks for showing people what happens to the rear axle lubrication when they put those flat diff covers on the rear axle!

[@justinschuyler]

An aftermarket diff cover murdered my family

[@coop_69]

Bruv what

[@alouisschafer7212]

Uhm what?

[@shockingguy]

Huh 🤔 you got a put up here Than just that nonsense, please explain or show articles

[@justinschuyler]

@@shockingguy I don’t like talking about it but his name is Diffy McDiffcover and if I ever find him I’ll have my revenge

[@life_of_riley88]

@@justinschuyler I heard he was hanging out with Joe Diffy, maybe you'll find him in Nashville. . .

[@JREACHER1954]

SOLD! Now make them for older Chevy trucks and you'll get my money.

[@bankspower]

How old is your Chevy? Our Ram-Air cover for the 14-bolt AAM axle fits HDs back to 2001.

[@cucvfarmer]

@@bankspower need to make covers for GM 10 bolt and 12 bolt diffs.

[@cumminsnchevy]

I would buy one for 10.5 Chevy 14 bolt axle, as I’m sure tons of other people would buy one for this axle, there are tons of them out there and many of us still run them

[@jessiej3991]

@@bankspower Gale can you PLEASE make these for the old GM 10.5" Corporate 14 bolt ??? Btw I have a 1987 Chevy V20 4x4 with a 1997 intercooled 5.9L Cummins P-pump 12 valve with compound turbos ( Borg Warner T3 S366-SX3 on top and a Borg Warner T6 S475 on bottom ". I swapped out my old tired 6.2L Detroit V8 diesel to the Cummins beast I have now

[@JREACHER1954]

@@bankspower 94 and a proud owner of a Banks 3 inch turbo back exhaust system for the 6.5TD. Back when you guys were the only ones doing performance upgrades for that platform. Sadly feel like we've been kicked to the curb as you are offering diff covers for older models of Dodge and Ford. 😭

[@bigredracer7848]

First 👍's up Mr Power thanks again for taking your time for us all to be with you for the great show

[@jacksoncrawford2175]

Thank you so much for the deeply informative videos banks. Been binge watching and liking every video weeks straight !

[@banjominer9682]

watching the same video as everyone else and its very clear that the oil is going up and over the gear very nicely on your competitors...dont be such a hater..

[@danhambrick6331]

Gale Banks, you're The Man....👊👊👊

[@johnbishop1911]

He worked with the EPA to shut down tuners. So he could sell his products

[@crazyman8472]

Now there’s a man who loves his job. 😎

[@M530H]

He showed the competitions model failing to lubricate, but didn't show how his model succeeding to lubricate. Don't tell me it will do better, show me.

[@JimBloggins1]

I was going to say that exact thing

[@bankspower]

Thanks for watching. For a full breakdown of all the data and comparisons, we have an entire series that showcases the diff cover development. Watch the full "Behind the Diff Cover" video series here: kzbin.info/aero/PLwtmrqcWzLtQR9riOg8mizIEj-UX4WBBm

[@ansv3340]

but there were some horizontal ribs on the cover that you did shave off. need to do same ribs on the glass too.

[@FordsAndBaggers]

Wait a minute are you supposed to use more oil in those bigger diff covers ??? Maybe that’s why you’re not seeing the upper area get any lubricity 🤔 and I wonder what those lines may do and where they make the oil travel ?? A lot to consider

[@koulee2014]

I’ll just stick with my oem cover.

[@Jesse-fz8pu]

Just do regularly oil changes every 5years, you will be fine.

[@albertgaspar627]

and this is the axle sitting perfectly level. Imagine climbing up a rockface.

[@mikeyhue2437]

LOL u don’t run these off roading son. Mostly straight line a few mins of up hill won’t do shit.

[@QuitProcrastinating]

What do you expect the fluid to do? The whole video is very scientific. “whoa dude, look at that, I don’t know what’s going on but it must be bad.”

[@michaelshay5594]

Should take temp reading's at front pinion. Stock & aftermarket.

[@richardelliott8352]

the inclusion of a sight glass is a winning touch. I run a transaxle, with no possibility of using this part, and still enjoyed the reviewing the part, because of the fine engineering.

[@bbbojangles]

Its quite wrong to think that no oil is going forward… it is painfully obvious that the top of the ring gear will be throwing oil forward almost as much as the stuff seen going rearward. Have you even ridden a bike in the rain without a fender? It is nice to see the test, but your conclusions are not correct.

[@norman_sage2528]

Leave it to the master to educate the public

[@bjmckay3]

Awsum R&D mate!!! That's Design & Efficiency outcome of a product at its Best!!! 👍👌

[@johnmclaren7059]

I would have like to see the plastic diff cover molded as the same as OEM to see the splash pattern! Not on a FLAT surface….. the jury in my court is still out on this !

[@bluegizmo1983]

Damn, I learned something!