Do You Need a 6 Speed Auto? LS C3 Corvette Transmission Swap EXPLAINED.

[@mattm2684]

Only about half the views are liking this video. Let's support this quality automotive channel and get the likes up 👍

[@cyclesaviorn2700]

Probably not going to like it because your customer wasnt fully informed, nor did you have the information to really give them. 6l80s have a myriad of issues that cause them to fail just as easy as the 4l60hd aka the 4l65e. When driving a high horsepower engine on the street and being afraid of it any shift is going to be terrifying. Fd ratio being the same, the only thing you actually did is put him through MORE terrifying shifts with the early gears being MORE torquey and likely to spin tires. Officially solving NONE of your customers actual problems besides .5mpg improvement.

[@tatertots-n-soup]

Hes a scammer that knows nothing about cars. He is just a face man standing at the front desk out of his mind on multiple drugs falling over on his mechanics that need to stand him back upright while smiling at the customer the whole time.

[@EricMansker]

I like almost everything I watch. I appreciate the effort, and unless the video-maker is contemptible or dumb, there is no reason not to like it. People act like the “like” button is actual money out of their own pocket. Selfish bass-turds, give a like if you watch at least 1/4 of a video and don’t h8te it.

[@frostyab7579]

not quality when they're spreading wrong info

[@MichaelAllan01]

100​@@cyclesaviorn2700

[@shoryuag]

6th gear in the 6L80E is 0.67:1, if I remember correctly. I figure it was a typo in the video. Also, the 6 speed won't change the cruise RPM much at all without a much taller rear end gear. The reason the 6 speed was a big deal is because it allowed tall rear ends for fuel economy to be paired with good performance because of the gear spread. 0.69 vs 0.67 is basically the same, so not much should've changed unless you guys also swapped the ring and pinion, which wasn't mentioned. Also also, I've been occasionally coming back to this channel to watch your ITB setup on the E92 dyno video since it came out. It's really nice to see you guys branching out.

[@rlscustoms]

Yup only real difference would be better gear spread ergo better acceleration, cruising speed is pretty much unchanged!

[@NXT_LVL]

0.67, same in my 545rfe in my Dakota. Noticed even with my moms 2019 Ram with the Hemi and the 8spd, same mph same RPM as me, ~2000rpm at 70mph. Think her final drive is a 3.21? mines a 3.55. Biggest difference would be tire size. She's on 20s with a 31" tire, I'm on 17s with a 27" tire

[@shoryuag]

@@NXT_LVL If the RPM is about the same for the two vehicles, and you know your final drive is 3.55, the RAM’s would have to be 4.10 with that tire size you specified.

[@confuse3671]

I know with the T56 and 3.42 is just below 2000rpm at 80mph. You must be sure that your engine can work below 2000rpm. Depending on your cam choice that might not be possible. That being said, the corvette can be challanging to gear. If you do the 12 bolt internals swap the lowest gear ratio you can get is 3.73 and I think you need a thin one at that (one that fits a 4 series posi). I have dealt with C3s - the real challenge is physically fitting the transmission in. The cross member is not adjustable and the floor is fiberglass (up to 1975). TH400 is stock on most of these applications, but the 4L80 was supposedly a tight fit.

[@tatertots-n-soup]

You have to have a motor with extreme amount of low rpm torque from idle-3500rpm for a transmission like this. Not loads of high rpm 6000-7000 tire busting horsepower

[@cheezykey1139]

Bro lifted that 4l60 like it was 20 lbs

[@tatertots-n-soup]

I thought he was gonna pop a vien

[@mk1classic]

The ZF 8-speeds from the BMW and Dodges goes into a lot of conversions now. Aftermarket TCUs make the conversation easier. The 8-speed comes with fast and crisp gearshifts instead of a slow automatics or even an old manual gearbox.

[@BashingBrainez]

I was about to comment the same thing. I myself have a bmw with a zf8 speed and love the transmission and how easy they are to tune.

[@daffiecars]

The zf8 is an outstanding transmission

[@BeefSupremeAviation]

Seems Legit Garage has parts and videos for the 8HP90 to LS engine swap.

[@johnbelveal4775]

The zf is a very nice unit

[@forcedtomakeanaccount7628]

What's interesting is GM's 8l90 is basically a clone of the zf8, they just swapped the location of two of the gears, but the rest is the same exact design as the zf8.

[@TheTruthBeToId]

Great production quality. Feels like im watching a big established channel.

[@FluidMotorUnion]

Gee thanks

[@autonomous6109]

Explaining the axle ratio with the RPM and final drive ratio would really help bring the concept together for people. Show that an old axle ratio like 3.42: 1 can be replaced by 2.62:1 because of the low first gear and the better spread with 6 speeds. Subscribed!

[@installwebercarburetorsona6159]

A3.08 rear gear is common and widely available for that generation C-3 and would drop highway rpm nicely.

[@SSO1025RET]

Please keep the videos coming. You never know when one of your viewers comes across your video that might help them with their project.

[@FluidMotorUnion]

That's the plan!

[@erich6879]

OJ, is awesome, great channel. You and Alex are my go-to channels!

[@badralnimr8063]

Thanks for entertaining us for 15 minutes 😂. No really I like your videos and the way you break down things. It's more info in a style. Salute.

[@HaloToday]

Really appreciate all the technical videos you do with these special cars, also love the fact that you keep the sensationalism to a minimum.

[@vasili70]

Thanks for the breakdown, OJ. I have a C3, mostly stock 350 with the Turbo 400 trans. I have been thinking about doing as trans swap, mostly to reduce RPM on the highway. The way the car is currently configured, I was looking between the 700R4 or the 4L60E (since I have a 4L60E available. Debated on making the jump to the 6L80, but I think it wouldn't make sense for this car. Again, thanks for breaking things down and helping me take the 6L80 off the table!

[@tatertots-n-soup]

4L60 is quite abit skinner. With the higher rpm and horsepower/lower torque of a 350 and simplicity of a controller and narrow cockpit it is probably the smarter choice over the 6L80. But the R700 can easily by customised to handle the higher rpm smallblock over the Ls3 and up motors and not need modification to the trans tunnel. Youll need to seriously up the lowend torque as much as you can of the sbc and drop the diff ratio and fabricate trans mount and tunnel. Plus your going to need an electronic third party aftermarket electronic controller and if your thinking about Ls swapping it one day you might as well buy the holley controller now.

[@texx1017]

nice breakdown of RPM and power differences

[@lewisfoltz6306]

I did a full reverse manual valve body with a 4200 stall and triple disc lockup converter. I’m very pleased!

[@FluidMotorUnion]

to your 6L80? sounds fun!

[@lewisfoltz6306]

4l80

[@MrPsiclone666]

always loved the c3, with a ls and 6l80e it would be a dream drive. great video nicely done

[@FranciscoPerez-hw1vh]

Thank you for producing these videos, the information you provide is greatly appreciated.

[@FluidMotorUnion]

Thanks for watching!

[@thomasmurphy5906]

Thanks for taking the time to teach us about all the cool things you do at Fluid Motor Union

[@brendanh4958]

Thank you for the content OJ- I really enjoy watching these FMU videos.

[@opietwoep1247]

Great video Good luck with the Channel. Love seeing content from IL.

[@andysteward8617]

I appreciate the acknowledgment of the difficulty, even the factory is having, in making these electronically sophisticated transmissions reliable

[@ItsZICCY]

Not enough people cover things in the C3 corvettes. Thank you.

[@markhoppe4391]

OJ I am appreciating the effort and knowledge that you are putting into these videos!

[@jonhightower3505]

Thanks for entertaining me for 15 minutes....lol. No worries, I have been a fan since I saw you on Alex's channel. You will grow, just takes time in this space. Cheers

[@johnbugman1]

AJ is a top notch mechanic and fluid motor union as a shop is second to none!

[@chadriddle3517]

Yes , everyone support this channel please! I remember first time I seen OJ on Alex’s channel with the 400,000 miles M5 ! I could tell then OJ was very sharp. Thanks fmu

[@t.l.robinson2162]

I am very glad that I happened upon your channel through another channel. I love your content.

[@FluidMotorUnion]

Glad you enjoy it!

[@online247365]

This is great content about a topic that nobody else seems to be covering... Well done. 👏🏻

[@dbta84]

I found you guys through Legit Street Cars. I've been really impressed with y'all's work on that channel. Looking forward to seeing more here!

[@FluidMotorUnion]

Welcome aboard!

[@rubyred93chev]

_Another great informative, and entertaining video from FMU. And what better way to explain a 6-speed auto in an LS-swapped '69 Corvette Stingray. My exact sentiment was why the car had the LS swap but kept the old transmission set-up(then you noted the diagram of the LS engine and drivetrain package). Here's the greatest point about classic somewhat resto-modded cars, without a good mechanic shop, going down that rabbit hole can be cost prohibitive. Kudos to Mr. Mills and to the future of a nice early C3 Chevy Corvette._

[@IGY6MJ]

Happy Holidays to everyone at FMU

[@trebark1]

Great video. Love the thoroughness and detail. Great presentation. Also, the ‘ask’ for likes, comments and subscribes is the best I’ve ever heard. It was sincere and heartfelt. Finally, I agree with another comment that the ratio of views to likes is off. It’s not hard folks- hit that like button!

[@FluidMotorUnion]

glad you liked our ask but I guess it didn't work as I see you are not subscribed...

[@TheBBodyBuilder]

Thanks for taking the time to share your knowledge and expertise. Love your team’s work OJ.

[@yayarx7]

Great job. Your monologue reminds me of old school powerblock tv shows

[@43teeroy]

love the content you do with LSC! you guys do excellent work!

[@FluidMotorUnion]

Much appreciated!

[@markcollins457]

The C3 was such a sexy ride these upgrades are definitely in the correct path. I would guess the frame and suspension could benefit from a little massage. After seeing you on other channels you have the rep to make this a "GREAT" channel. Good luck and I'll be watching.

[@davedavis775]

At Corvettes at Carlisle there are a couple companies who do chassis swaps for Corvettes . C1, C2, C3's . Allows you to use whatever engine and more modern suspension . It's not cheap even just the frame ready to accept your style of engine and modern Corvette suspension . I saw at least two owners who showed up with enclosed trailers and purchased complete rolling chassis including the drive line . The chassis came on what looked like orange wheeled donuts to roll. You supply your own wheel and tire combos . I think the bare chassis were over 20 grand close to 30 k . Talking to one chassis builder he said with complete driveline and his chassis with newer Corvette suspension he had about $120,000.000 in a 73 Corvette . Not including the body itself . So these swaps using the best and more modern suspension/ chassis and engine swaps get very pricy .

[@georgemacgregor5437]

Became a subscriber after I saw you on Legit Street Cars. Enjoy the info and the videos. Thanks for your time.

[@onnovannoort7690]

Great video OJ, this channel is going to grow! Great content!

[@erichelm4339]

I like watching you on light street cars. First video I have seen of yours

[@Zelaznogsiul-63]

I imagine this has to be over 6,000 to do this swap, I could be wrong but everything is so expensive and the knowledge to do something like this is not cheap. Great video and have a happy new year.

[@stevesters6]

U guys are going places with this channel🤘

[@MichaelSPalmer]

Fun video. Had this debate when putting together my LS3 Roadmaster Wagon swap project (it’s all on the Internet Brands Auto Group YT channel). I really wanted to do the 6L80 Connect and Cruise, and for a while, it was actually cheaper than the 4L65e, but as a first time DIYer, my Chevy Performance dealer recommended the 4L65e bc it was easier to fit in the OEM Roadmaster trans tunnel. With 3.42 gears it hits 2300 RPM at 75mph on the highway, but I can still manage 28mpg if I back down to 60-65mph in 4500 lb wagon. The downshifts are a bit weird at times… you want to accelerate but suddenly you’re back in 1st at 5500 RPM… and I don’t like how it rushes to get to 4th gear (I still need a trans tune). And the supermatics make a weird buzzing sound Chevy says is normal. But it has some fun features where you can blip the throttle (almost like a rev match) and it’ll drop down a gear consistently. Overall it’s working well, but would recommend the 6L80 of folks can manage it. Cheers!

[@MexicanVulture87]

Love the channel and all of your knowledge! Thanks for keeping the content fresh and educational.

[@Keasbeysknight]

Great timing. I haven't watched the video yet but wanted to comment. I have a 97 cobra I'm rebuilding right now, all forged and arp, should be good for 1000hp and I'll be aiming for 600-700. I have a t45 5 speed that won't be long for this world if I don't baby it. Always liked the t56 6 speed but never felt it would get me much. Hopefully this video will make it all clear!

[@factory81ch]

U guys are one of my favorite channels thank you !!

[@iliasmoussaoui5076]

Great video O.J. thanks for the breakdown.

[@dmax1234]

FMU for the win, OJ getting more comfortable every video. Quality editing too. Dont give up, keep going it will be worth it. Educational and informative content.

[@TheRebuilt1]

great to see this knowledge transfer and discussion on drivetrain on non European vehicles. You guys cover a lot of ground. Cheers and much respect.

[@terryshrk]

Bravo for being able to competently making the unexpected modifications for this swap/ The muscle car community online LOVES LS swaps and you can read raves about them online all day,. HOWEVER,..real world reviews and info about using updated transmission for these beloved engines are few and far between.

[@root1911]

Nice dead lift intro! Great breakdown of the technical data. Keep it up!

[@joeethereal2968]

Outstanding! Stock torque converters of the 6l80 are the weakest link, however.

[@joeethereal2968]

Another note: the 6l80 from GM & the 6R80 from Ford are half-siblings in a sense that they're derived from the vaulted ZF 6HP26 featured in other foreign luxury automobiles.

[@fatdynaguy8475]

I've really enjoy the content of this channel. Keep up the great work!

[@FluidMotorUnion]

Glad you enjoy it!

[@petesgarage2224]

Great video O.J. I have a 1970 Chevelle that I have been thinking about doing some type of trans swap to. Thanks for making the video. I'm not far from your shop maybe I'll bring it over one day. Keep up the good work.

[@tatertots-n-soup]

Lmao

[@briannachase5101]

Kudos to you and your team for this informative video! Now I have a more clear path on what I can do for my own C3. 🙂

[@FluidMotorUnion]

Glad it was helpful!

[@hutchdw77]

FMU deserves the total support of the auto enthusiast community.

[@FluidMotorUnion]

Thanks for the love!

[@hutchdw77]

@@FluidMotorUnion thanks for sharing your knowledge, putting out awesome content, and making sure cool cars sound dope as!

[@tommanley2924]

You guys are doing a bang up job. Keep up the exciting work.

[@whitebass16]

New to the channel and I'm enjoying the videos

[@rohittaurus911]

Thank You for information, OJ. Awesome Video as Always.

[@jonhawken9364]

Love the ls3 swapped vette. My wife's favorite body lines.

[@123karismith]

Great info, you shifted all over my 4l65E rebuild....time to go 6 speed!

[@FluidMotorUnion]

Cost and a smaller size are the only legitimate pros for the 4L65 over the 6L80.

[@korn111685]

I have a 6l90 is a suburban, it’s an impressive transmission. They have issues with the stock JMBX converters so if you have an 80/90 swap it cost you &5k + for a transmission job.

[@muhammadyusran789]

Thanks O J & FMU team for this well presented explanation about transmission swap.

[@ACamaroGuy]

Just added long tube headers to my 2014 Camaro SS automatic. 3:27 rear gears are no good now, I lost a lot of low end grunt. I'm thinking of going to the 3:45 rear gear.

[@bobdollinger]

Keep it up! Always like your content.

[@plugmand1910]

I've been wondering about this for a while now! Thanks for the information. Happy New Year!

[@ChrisStearns88]

Great start OJ. Looking forward to continuing the channel content! Adding a comment regarding the use of the "green-screen" effect. Don't have your body shifting across it. Keep it stable/anchored to one spot...closer to the "books" in this case...and just maintain the space to the left as your picture-in-picture area. It will function better for the video.

[@stevegee218]

Video production getting better. Thanks OJ and team.

[@FluidMotorUnion]

We got a long way to go before we are at a level we are happy with, but your support is allowing us to expend more time on it. Thanks for noticing.

[@richards1816]

I haven't seen OJ since his appearance in Legit StreetCars channel. Good content man!

[@gregarmstrong552]

Thanks for the video! I wish I lived closer so that you could service my vehicle. 👍

[@denisfranchetto424]

Really enjoy the videos, very informative and learn quite a lot. Keep up the great work

[@tommaloy90]

Very informative, nice to see a comparison

[@hylandfoto]

Nice to see a C3 out on the road!

[@anthonyruthenberg879]

I love the channel! I look forward to every new video.

[@norseman4763]

Nice to see a shop take on challenging work rather than just refusing to help.

[@FluidMotorUnion]

You got that right!

[@jonsingle1614]

New subscriber here.....loving your channel and content!!!

[@FluidMotorUnion]

Thanks for subbing!

[@fueledbyadventures]

Good content and great work as always. On a unrelated note, I want some of your e39 M5 headers one day.

[@williamrobinson4849]

Enjoyed the video, but I understand that you are a business. I'm hoping that you have more of both in the future.

[@Nihil1st1347]

You show very interesting content to me, all though i own no Corvette. Thx a lot.

[@briancrook6564]

Thanks Oj, great shop. hope to bring you some work some day.

[@FluidMotorUnion]

Please do!

[@curiousumscientia3648]

Hope to bring my 90 iroc-z to your shop for custom exhaust to clear heidts irs we have installed. Grew up in Naperville in the early 80s and haven’t been back since late 90s so would be nice to get this work done with your shop.

[@brianday8217]

Nice content. I like seeing OJ’s personality come out more than you see in other channels, and the subtle jokes in the dialog and the added imagery are great. I’m always impressed at the variety of makes and projects you take on. 👍🏻

[@caseymanning5762]

Great video! Never really though about a newer auto. I’m always the manual swap guy. But, sometimes if you’re gonna daily a C3 Vette, maybe a modern auto isn’t a bad option. Looking forward to watching the rest of the videos!!

[@scottymarsh6034]

Very informative, I'm a believer in drive train performance. Best improvement for your vehicle is drive train, doesn't do anything to add power if you're trans isn't translated

[@kleid9160]

Thank you for the in depth breakdown of these transmissions.

[@altink8823]

Glad to see you start doing these vids

[@chriscampbell885]

Great new channel. Keep up the good work OJ!

[@fstlnj29]

I instruct on race tracks and we get drivers with older cars that have automatic transmissions in their cars show up. Most have overheating issues. A video on that or what they can do without spending tons might helps. New subscriber and saw your work on the exhaust for Alex LS Porsche. Very nice work and enjoy your skills and content!

[@thatsonebadhatharry8610]

If they don't already have one an external trans cooler would be a good and cheap place to start. And if the trans has a lock-up converter then a switch to keep the converter locked up under hard throttle would also help. Of course the trans and converter need to be strong enough to handle the abuse.

[@t.l.robinson2162]

I never knew that more gears were so important until I switched from a truck with a 6 speed to a truck with a 10 speed but the same engine. It is quicker and feels as if it has more horsepower.

[@tatertots-n-soup]

Amazing how feelz can be decieving

[@tonydemovic355]

keep it going don't give up

[@drewski23_7]

The way he just MANHANDLED that transmission up onto the workbench!!!

[@1960Murf]

Keep the videos coming, OJ.

[@ehardwick]

My algorithm served this video up to me today. Certainly earned a like and subscribe from me! Want to do a c3 restomod one day and this was another great data point for how people approach these builds. It’s probably going to be a 6 manual for me!

[@FluidMotorUnion]

We appreciate you and thanks to the algorithm gods

[@jamesmedina2062]

Happy holidays Oj. Good video. I would appreciate a little more over-the-road content because there is so much there that can be analyzed such as acceleration from stop, the shift quality, and the cruise RPM. Drivetrain can be a complicated animal but you have it cornered. Don't forget rear end is in the game too. Best part was watching you pick up the trans. 💪💪👍

[@T_B_C_L]

You guys do some awesome work, and have very informative and entertaining videos. This channel needs many more subscribers. By the way, I don't think your supposed to lift a transmission on to the bench like that.... 😂 🤣

[@estern001]

Thanks for entertaining me for 15 minutes!

[@sloqlap]

Fantastic explainer, I love your technical dive into the subject. This gives me an idea for swapping the 4-speed auto out of a Nissan Stagea RSFour to see if the fuel effeciency can be improved a bit than the ~15ish MPG. Hell, maybe even LS Swap it for the occasional towing.

[@greapsoho]

Thank you for the work you put into youtube. Keep up the great work

[@FluidMotorUnion]

Glad you enjoyed it!

[@danielmulqueen2375]

I'm asking these exact questions looking at modernizing my OBS Suburban.

[@kriskerkman375]

I knew I wasn’t the only one to notice the 0.07:1 sixth gear ratio listed for the 6L80, but since you asked for comments, I figured I’d do my part. 😁

[@FluidMotorUnion]

You were supposed to leave 5 comments if we got it wrong 😂.

[@____MC____]

Ive driven both 6 an 8 speed gm trucks and its a huge difference in the butt dyno. I do like a 3 speed in my older truck with more power. It feels like its always in the right gear and doesnt hunt for gears.

[@Samcrac]

Swap in a Getrag Dual Clutch

[@flacostacos3144]

Good knowledge here! You guys are studs at Fluid