99-06 GMC/Chevy front differential gear change.

Yanking out 3.73 and going to 4.56s in the front diff of a 2000 GMC z71
Ring gear interpretation: departments.web...

[@slowmerkur]

For the past 100k miles the front diff on my 2006 Denali has been screaming like Rick Flair. Wwoooooooooo

[@bluecollarhowto3489]

It must be full time 4wd

[@20tea]

Yeah, it's awd. Also, I've cracked the housing tube on those and got a new 4wd housing on the cheap. Works fine for awd, just plug the 4wd sensor hole. Saved $150. Think because the 4wd housing is more available.

[@lancewelliott]

Awesome video, got my diff out, and feel much better about tackling this after getting to see the parts before I go tearing into mine.

[@bluecollarhowto3489]

Glad that it was a help to you

[@enochpatrick4498]

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[@jaceisaac7379]

@Enoch Patrick Instablaster ;)

[@enochpatrick4498]

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[@enochpatrick4498]

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[@nemodakidz6012]

The first thing i see was ur wrist band watch.. it seem so tight and made my eyes all watering!

[@Jesse-fz8pu]

Thank you for your time and effort. Really help me out. Hope to see more videos in the future.

[@swatson0061]

Got my rear gears in, about to do the fronts.

[@eyuhyeh]

i need to buy one of these

[@CasperRc81]

Pretty sure that bearing race is designed to float. Via the bearing adjuster turns like on a 9” ford. Wouldn’t make sense to have the race pressed in. Just saying idk great video thx.

[@David-yy7lb]

You know that disconnect sleeve is the weak link/ fuse in those differentials, I busted one before and was pissed however I replaced my sleeve with a billet steel sleeve but now I have no use for my two 9.5 front differentials with 4.56 gears because I did a solid axle swap on my dmax dually those IFS differentials I have will fit any 2000-2011 2500 and 3500 Chevrolet/ GM truck

[@bluecollarhowto3489]

You are right howev people want conveyance so the automaker gotta make it as easy as possible for people to put yhe truck in 4x4 so they will buy them. A lot of times, that system weakens the truck.

[@David-yy7lb]

@@bluecollarhowto3489 exactly 👍🏿👍🏿

[@spelunkerd]

Thanks!

[@davidcraft4909]

Wow, that type of front differential really does throw a few curve balls doesn't it? I know how to set gears on the more traditional style straight axle like gm 12 bolt, 10 bolt, and samurai. but this one looks a lot more difficult. thanks for making this vid.

[@twanttwtcc3804]

What would happen if I installed that clutch ring in the wrong way. The ring that engages the 4wd

[@ELREYYAVIENE1026]

Hey question is possible to eliminate front diferential on 04 gmc yukon xl and just drive with the rear diferential.

[@bluecollarhowto3489]

If you mean take out front drive shaft to diff then yes. your you want to remove the diff, you would have to get 2wd hubs

[@ELREYYAVIENE1026]

@@bluecollarhowto3489 no i talking about to remove front diferrntial because is damaged and i dont want it you think it will work just with rear axel

[@bluecollarhowto3489]

@@ELREYYAVIENE1026 You can remove it. you will have to take out your drive shafts and cv shafts. You will either have to cut your cv shafts to the end can stay in the hubs or the hubs will have to be replaced with 2wd style hubs.

[@joeybaltz582]

Please answer. I just bought a new 18. I am running 35" tires. Want to regear to 4.56. Where do i get front diff gear from? or do i buy tow rears and change them both out? I am unable to find any answer on this online. Perhaps you can help.

[@bluecollarhowto3489]

The front and rear or totally different. The rear will not fit int the front. There are many places to buy gears from. such as eBay, Amazon and many 4x4 type web sights online.

[@joeybaltz582]

@@bluecollarhowto3489 thank you!

[@DS-Turbo]

Richmondgear.com

[@gabrielacuna2133]

Very helpful👍 Do You got a part number for the 4.56 gears ?

[@bluecollarhowto3489]

No. Just go on Ebay or Amazon. I prefer Amazon due to ease of return and 2 day shipping. Search for 4.56 gears for your year truck. A full kit with both front and back gears with install kits should come up

[@EducationAdict]

I need an interpreter for 7:00 - 7:10

[@markwhitnell5752]

I have a 2003 Tahoe Z71 w/4WD and a Escalade 2004 AWD. Can I interchange front diff? And just add a switch on dash of Escalade? If so how do I determine axle ratios are the same?

[@bluecollarhowto3489]

The tahoe diff will bolt right in. As far as making the swirch work. Not sure. There are swtichs in the tcase that also have to be activated. Not sur how awd case woukd handel the frint diff disengaged. You could put doacers in the diff actutor to keep it ingaged. The gear ratio is in your glove box on the sticker with all the numbers. Most likely a gu6 or gt4.

[@Marcosvlogs847]

Good video

[@bradynbrown41]

When running 35s. Would a 4.10 or 4.56 be better. Truck is a 1/2 ton. Sierra. 4x4. With the 5.3. Daily driver

[@bluecollarhowto3489]

If you run 4.11s wit 35s it will be very close to stock, 4.56 will give you more power, less mileage

[@bradynbrown41]

I currently have 3.42. And the truck is a slug on take off and towing. It's my daily. By I do tow a 16' full of 4wheelers alot during summer a car occasionally and boat.

[@bradynbrown41]

I'm installing my 6" lift and 35s on 20s this weekend. And plan to order gears soon. Everyone on forums and what not keep saying 4.56. But I was trying to get some real world perspective .

[@bluecollarhowto3489]

Running 4.56 with 35s would be like running 4.11s with stock tires. U will like the extra power the truck will have with 4.56. Plus your trans will like it much better

[@bradynbrown41]

@@bluecollarhowto3489 sweet man. Thanks. A ton. Guess I will be ordering a set of 4.56

[@daniellawson652]

❤

[@raymeadows4383]

What's the stubby little shaft called I have a 93 4x4 but it doesn't have the little stubby shaft and don't know what to call it lol?

[@bluecollarhowto3489]

Not sure which stub shaft you,re referring to. I'm assuming you're talking about the one that goes from the carrier to the disconnect. You may not have it if your diff does not have the ability to disconnect.

[@raymeadows4383]

At the very beginning of the video it's the smaller shaft on the right it would have been your left that you put inside the thing to engage the 4wd

[@bluecollarhowto3489]

@@raymeadows4383 That is the stub shaft that goes from the carrier to the coupling. I show the installation around 32 min mark. I have not idea its proper name.

[@leroygreen1877]

Low must feel like a tank on 4.56 gears set. How are the RPM's at 70 mph?

[@bluecollarhowto3489]

with the 37s its around 2200

[@rjm7168]

I'd sure like to hear how those new gears sound ... just sayin' ... 🤪

[@Alycookie100]

Hey there, what type of fluid do I need for my diff

[@bluecollarhowto3489]

80 to 90 w gear oil

[@stevendiemer2833]

Arent they all the same from 1989 up ?

[@bluecollarhowto3489]

the gear set up will be

[@Kondratko]

Wait so the Axel's arent retained in the differential at all?

[@bluecollarhowto3489]

The have the little ring clip that keeps them in place.

[@Defcon666]

Dong Dang put this washer right here and that bolt goes there .thanks for watching. 🤣

[@MikeBrownOhio]

I've heard that the 1/2 and 3/4 ton front diffs are the same dimensions on the outside so, in theory, I can run the 4.10:1 carriers and only need to change them with the stock ones???Good to know...

[@bluecollarhowto3489]

Mike Brown Ohio the the 3/4 ton is diffrnt than the half. But 4.11 will fit the stock career, some 1\2 tons came with 4 11s as well as suvs and avalanches

[@MikeBrownOhio]

I was told the 1 ton was the only one, not the same outer size...I'll take your word for it that they are different...Currently have a 93 3/4ton 4x4 with 4.10:1, 33s, and no lift...I need to get some new transmission lines as the old ones have decided to leak and rust out...Have a great day...

[@bluecollarhowto3489]

Mike Brown Ohio you my check, but as far as I know the 1/2 ton has a 8.25 ring hear and the 3/4 up has 9.25. The framed are different so it will not bolt right up.

[@Compound_B_Fabrication]

When I watch how to videos I would think, "who doesn't give a thumbs up to these?" and then I saw you use the dremel on the inside of the bearing... WYD? get a press

[@bluecollarhowto3489]

That was to make a set up barring, to test fit for set up. That way they don't have to be pressed on and off every time you take it apart. And put together for set up. Once all the right shims or found and proper set up is confirmed then the new barrinings are pressed in. It's been a while since I did this video, but I thought I explained that in the clip.

[@TheDerekmeline]

@@bluecollarhowto3489 you did explain that and I actually have a full set of test fit bearings for multiple differentials and transmissions because sometimes you can tear up the bearings getting them off. Test fit bearings are the fastest and best way in not only my opinion, but every mechanic I've ever worked with, to get shimming set quickly and accurately. Of course you also double check wear pattern after new bearings are pressed on and I've never had to pull and repress a bearing using test fits. Some people either don't listen or they don't understand so you're in the wrong. Gotta love by-the-book fixing wrench turners.

[@rodriguezluisu87]

Are rear and front gears interchangeable?

[@bluecollarhowto3489]

No they are totally different. You can order front and backed with install kits all together. Ebay and Amazon have them as well as most places that specialize in diffs

[@rodriguezluisu87]

@@bluecollarhowto3489 Thank you! Im looking into doing 4.56 on my 2000 tahoe 5.3 with manual transmission

[@jessilooney2444]

crappy diff

[@jessilooney2444]

gm diff are not like they used to be so cheaply made toyota still makes cast iron diffs so i guess japanese is better

[@bluecollarhowto3489]

Tundra's are now also aluminum. The reason for so much aluminum in drives trains has more to do with the government then the manufacturer. Its all about gas mileage. This is the same reason every truck now comes with aluminum driveshafts. a secondary reason is the lighter you can make the truck the better your tow capacity.

[@CasperRc81]

Ifs diff housing have always been Aluminum as far as I new.

[@yomamasmaggot]

Why would the front diff on 99 and up Chevy need to be cast iron or steel? It's surrounded by a steel frame and brackets. The case only needs to hold fluid and gears it's not under any real heavy stress or heavy load.