GM 10 Bolt 8.5" Posi Install "How To" Chevy C10 Truck - Eaton Truetrac
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- čas přidán 22. 12. 2014
- This is the install video of an Eaton Detroit Truetrac limited slip/posi unit into my 1987 Chevy truck with a 10 bolt 8.5" Rear End using used set of 3.42 gears from a 88-98 Chevy truck. The truck has a 5.3L (325ci) Engine and a 4l80e transmission.
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PARTS LIST WITH LINKS:
Please let me know if any of the links don't work and I'll fix them.
Purchasing through my links below don't change the items cost, but it does help support my work here on CZcams.
If you need the parts list for NBS 99-present truck, just ask in the comments.
- EATON Detroit Truetrac Posi/Limited Slip Differential 10 bolt 8.5" 28 spline axle.
FITMENT: 1972 - 1989 GM 10 bolt C-Clip 8.5" 1.20" 28 2.73 & up.
www.amazon.com/gp/product/B00...
- Differential Side Bearing Shim kit, Richmond. Says Ford on link, but It works; Ford 7.5 in./GM 7.5 in./GM 8.5 in./GM 8.2 in
www.amazon.com/gp/product/B000...
All Eaton differentials made for General Motors 8.5" and 8.6" axles require special bearings.
For axles with small bearing bores (race O.D. or 2.89"), usually found on vehicles prior to 1999 (like the ones used on the '87 Chevy truck in this video), the required bearings and races are in the two links below.
- Bearings for Eaton Carrier x2 (Older Small Bore):
www.amazon.com/gp/product/B000...
- Bearing Race for Eaton Carrier x2 (Older Small Bore):
www.amazon.com/gp/product/B001...
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
For axles with large bearing bores (race O.D. of 3.06"), usually found on vehicles from 1999 to present:
- Bearings for Eaton Carrier x2 (Newer Large Bore):
LM603049
- Bearing Race for Eaton Carrier x2 (Newer Large Bore):
LM603012
- 3 qts regular GL5 gear oil
Pick up at local auto parts store. No limited slip additive needed for the Eaton Detroit Truetrac unit.
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IMPORTANT INSTALL SPECS:
- Ring Gear Bolts (reverse thread) Torque to 65ft lbs
- Side Bearing Cap Bolts Torque to 60ft lbs
- Backlash should be .005-.009
Pinion pre-load:
- New Bearing 14-19in lbs
- Used Bearing 6-8in lbs
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BURNOUT VIDEO KILLING THE TIRES HERE:
• Big Smokey Burnout '87...
Driving video of this truck with the WELDED DIFF doing hard pulls here:
• 5.3 Swap '87 Chevy Tru...
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Keep on Wrench'n!
Mark
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Check out my other videos like this on my channel by clicking the link below:
/ agearhead4life - Auta a dopravní prostředky
I installed a Tru-Trac in my own Chevy pickup. I bought a complete installation kit that included new, larger bearings and a shim kit when I bought the Tru-Trac. The installation was seamless and easy. Took just under eight hours from driving the truck into my shop to driving it out. Several things I'll point out in this video that are not 100% always true: one, the Tru-Trac is not a Posi. Posi is short for Positrac, which is the trademark name for GM's clutch-type LSD. The Tru-Trac is a Torsen-type (worm gear) LSD. Two, it IS possible to install the Tru-Trac without the shim kit. My Tru-Trac retained its recommended backlash using the factory-installed shims, and the shim kit was not needed. That may not be the norm, but it's possible you won't need the extra shims. If you can abide having the vehicle up on jackstands while you obtain the shims, I would not buy the shim kit until you find that it is required.
Before you remove the bearing caps, mark them so you can identify left cap, right cap, up or down. You'll need to reinstall them exactly as they came out.
When you press the bearings on the Tru-Trac, triple-check to make SURE you don't press them on upside down!!!!! You'll hate yourself if that happens.....
You can omit checking tooth engagement. Tooth engagement is determined by pinion location, and since you don't touch the pinion gear when you instal a Tru-Trac, tooth engagement will not change. You only need to check/adjust backlash.
Otherwise, this video shows some things very clearly and was well-presented. I'd recommend watching this and every other Tru-Trac install video you can find. Each one will show different things and have different tips. Remember, "If I can do it, you can do it." That's from Eric O. of South Main Auto; the best mechanic west of the Atlantic.
Thanks for the tech!
Lol Love South Main Auto
Love south main auto, he’s like a an hour away from me!
Good job Marine! Thank you for your service to this great nation ! And God bless you !
Putting bearings in the oven makes it expand and slip right on. The opposite for races. Freezing shrinks the metal. For those that may be new
At what temperature and for how long? Thanks!
@@larryjohnson3033 Never heat up hardened steel (like bearings or gears) over 400 Degrees F unless the manufacturer specifically states a higher temperature ...
Set oven to 400F to be sure and then it won't matter how long (just leave them over an hour.)
@@MikeBaxterABC got it, thanks
Hey man great video! You really do know your stuff. Im only 16 and have a 78 shorty stepside and your videos have really helped me a lot, they sure do get me closer and closer to having my ride back on the road. Keep up the good work!
Nice video!! Way to show the kids whats up. Nice skills!!
“Give a man a fish, and you feed him for a day. Teach a man to fish, and you feed him for a lifetime.”
thanks for all the detailed info never knew hot to add posi so it really helped with all the detailes
I always thought changing a carrier would be a pain in the ass, but thanks to you I have the confidence to change it myself! Thanks for the awesome video!
+Ali Haidar Thanks Ali! Make sure that you research the process of setting the pattern on the gears. That part can possibly get frustrating if you're not expecting it. A lot of times, when just changing the gears, the pattern will come out fine without needing to shim the carrier, but when changing to a different carrier, it's common to need to shim it to get the correct mesh of the gears. Making a pair of setup bearings with the old ones helps to make adjustments much easier.Good luck!
Thank you sir, makes what I've always considered an intimidating job a lot easier to understand. You've given me the roadmap to do it myself instead of finding someone else to pay, as I've always done in the past. Great video tutorial.
one of the best vids on installing a truetrac, thanks
Thank you Eric! I wish that I could have showed more, but I'll try again in the future.
Really good video! I like how you take time to explain precisely what has to be done, as opposed to explaining after the job was done. Keep 'em coming....subscribed.
I appreciate the time to make these videos. Very helpful. Thanks man
Great videos man! I've done all this to my '78 C10 11 sec drag truck back in the early '90s. It makes me happy to see people building trucks. Chevy made such a welcoming canvas for such projects with the '73-'87 body style. Keep up the amazing work!!!!!
dragman10 Thank you dragman!
This video was great! Filled in all the blanks for my 8.5 10 bolt posi build!
good video man. i watch a lot of your videos when im stuck in a project and need to solve it. always with good information. video quality and a project is broken down in nice easy to digest sections. thanks again. Semper Fi!
+Colt Nixon Thank you for your feedback Colt! Sepmer Fi Brotha!
Had to check this out before work! Good job, very informative. I plan on pulling up videos on the LS swap and rear-end upgrade shown here when I'm ready to do so as we have the same year/model truck. Keep doing what you're doing. It's greatly appreciated
Thank you Josh! Its great to know my efforts are appreciated. Keep on Wrench'n brotha!
Man I really love all of your videos keep up the great work I learned so much from you thanks
I’ve been putting of installing an LSD for years cause I don’t have a press and nobody around me will press bearings on customer supplied parts, and I sure as hell didn’t want to pay $1000 for an install. The socket to drive in the bearing was genius and Im mad I didn’t think of it earlier. I could’ve done an LSD install so long ago!! Man you make it look easy! Thank you for this video.
Great video! It is sad that the backlash setup got toasted. You can't really do this job right without it. Thanks for taking the time though. It was still fun to watch. 👍
This video is the answer to my prayers brother!! Thank you!
Thanks for the video! Great quality and learned a lot! Semper Fi!
Thank you for your service both on and off the battlefield. You are an exemplary American.
Very good information!
+jeffrey vaughn Thank you Jeff!
Awesome video.........not saying that I would try it not knowing much about rear ends but I really appreciate that you were very specific on what you did and doing a visual description as you were talking just made the video so much better......thank you my friend
Thanks brother for yer time and effort doing this. Big help.
thank you for this video ive been looking into posi but ive been raised with family who took everything to a shop to do it so i was alway slightly timid of doing my own work but since ive started i can say my upgrade bills are a lot cheaper
Cars been sitting on jack stands for about 2 days now.....Couldn't figure out how to get the clips to stay in, but now...Yes! Thanks buddy.
Awesome! Glad I could help!
Great detail--thanks for sharing!
Great video, I used tips from this to DIY my own broken G80 diff.
I want to give a good tip I discovered while putting the bearing on. Using a punch did not work at all for me and I was afraid it was going to damage the bearing.
If you rent the ball joint press from advance autoparts, there is a spacer in there that fits the bearing perfectly and has room for the differential snout to come through.
Thanks for the vid and links Marine, gona buy this so I can install on my 78 Nova rear 😎
A true mechanic don't need no stinkin' shoes! Thanks for the video.
Abunai One lmao Preach it!
Yeah I’m a bad influence on that part.
Fabulous work. Thank you for sharing!!!
Videos are damn good,thanks for making these helpful tutorials. Keep up the good work sir gear head!
Thank you RedDevil!
I should've known you are a Marine; Semper Fi. Great videos bro.
+Nun Ya Thank you Nun Ya! Semper Fi!
at the bare minimum he has a USMC tatoo
great video. got the confidence I need to embark on replacing the differential gears on the 3/4 Cheyenne. thanks
Thanks for the video, & even bigger thank You for your service in the USMC
Awesome USMC tattoo, thank you for your service
Thank you Chris!
Thank you for your service! God bless you and your family!!🤝🤙🏼
That is a great unit (Truetrac). I have one in my 93 Caprice. Same ring gear (3.42 8.5" 10-bolt), too. Had it on the car for years now. No issues.
Good feedback! And yea, this has been in my truck for a few months now and I love it.
I'm getting ready to put this same unit in my Silverado. Thanks for the vid and for the updated information. I have no doubt I'll be successful with the install.
Awesome! I hope that it all went well Larry!
killer video man exactly what I needed to see !!
Awesome install!!
back too the good stuff keep these vids coming
good video helped me explain it to my friend without having to do it myself. Wish i would have looked it up before doing it myself and having to call my old man
Thanks man for your learnin. Great info. I have this job comin up in my whining 97 chevy rear end.
Great video. Straight to the point.
This is the first video I've seen saying you need to check backlash and torque for ring gear, Good mention!! Most say install shims and go.
awesome videos man. i really like how you speed up the video when needed
Thanks Matt! And thanks for the feedback!
Thank you sir for the video! I don't have a very useful way to hold my carrier still to torque it down.
The plan is to get a 3.90 gearset, pull the pinion out, put the diff in, use the brakes to hold it still while I torque it down, then pull the diff back out and install the 3.90 pinion.
This was perfect doing the same to my 79 c10
Great job marine. Gave a sailor confidence to upgrade my wife's 76 camaro 10 bolt rear end to posi.
+afattori316 Thanks brotha! Just remember to study how to set the gear pattern with shims. The difference made on the pattern by pinion shim vs carrier shim. That's the hardest part.
+AGearhead4Life appreciate the insight and your taking the time to help us guys out. Helps save us a lot of money. God help America.
+afattori316 Amen!
Glad I’m not the only one to work on my rig in sandals 😜
Two items:
Safety: Put some boots on (not flip-flops) when you're working around dirty heavy equipment that could make a mess of your feet if something heavy and dirty (like the carrier) fell on them.
Torquing down the Ring-gear: After all of the bolts are torqued to spec, go over them a second time to ensure they're all still at spec (usually they won't be). Repeat this step until none of the bolts move at the torque spec.
perfect...can't wait to see them. thanks!!
hey man great video. looks a lot easier than i thought. i definitely want to do this to my 99 Dakota R/T sunday warrior
Thank you! Make sure that you study setting up the gears and crushing the crush sleeve before starting.
nice to see some more vids from you . merry cristmas and happy newyear from the netherlands
Thank you! Merry Christmas and a Happy New Year to you also! Be safe!
all of your videos are very informative good job
+dillon myers Thank you for your feedback Dillon! I'm glad that you're enjoying them. Keep on Wrench'n!
Another excellent video Mark!
Thank you Marcus!
Well done sir! I wish I had found a great video like this to refer to when I put my Richmond posi in mine! Still rocking 3.08 gears here I'll find a set of 3.42 or 3.73 at some point keep it up man!
Thank you Greg!
What kinda use do put to that posi rearend??? Talking about the gear ratios that u're talking. Im dealing with a 2011 chevy Colorado 2.9 project for dayly driven and street racing and some drifting on weekends
Can u suggest a nice ratio or i leave the 4.10 that i have right now... thanx
Install and removal was easy af thanks to this
Marcos Antonio Awesome Marcos! Glad to hear it. 👍
great video. great info and advice
Ur videos are very helpful an informative bud . Ur awesome bother keep on making videos .
+bigdogac1 Thank you bigdogac! I appreciate your feedback!
Really well made video! Very informative
Thank you bames! Glad to that you enjoyed it.
No sweat man . perfect info for me atleast! great video . thanks . rebuilding my rear axel on a 1979 g20 nomad next winter , also have a 1969 chevelle malibu with a 12 bolt posi , and my dad have a 1966 GTO with a 10 bolt posi he ripped apart on the track ...
Thanks brother, I'm looking at rebuilding the one on my 65 Chevy c10, i want higer gears for better gas mileage. And it sucks to already be in fourth gear before you hit 30 miles an hour. Not to worried about having posi, just would be nice to drive highway speeds, and not make other folks angry because I'm driving slow!
The only thing I haven't gotten into much is rear end, finding the info to do it isn't very easy. Been at it already a few hours.
Great video sir! Very helpful when i work on my 01chevy silverado
Alexander Lara Thank you Alexander! Good luck on the Silverado!
mark your shirt is a killa man got it on now got my eye on a 6.0 truck motor thanks bro
+Rick Wilson Thank you Rick! I'm glad to hear that it got there. Good luck on the 6.0 hunt!
Great video Mark!
Thank you Davie!
Great video. Doing this to my suburban soon. Semper Fi brother.
Thanks brother. Semper Fi!
Well done video!
Great video very informative!!
Excellent video!
Great job editing!
+Alejandro Gonzalez Thanks! Most people don't realize the editing takes longer then the actual project that you're recording.
Thank you for the video brother! Semper Fi!
Too easy brotha! Semper Fi!
Mark,Nice job as always my friend !! Now we need Burn-out videos !!!!!!!!
Yes we do! Tires are still in the bed waiting to be finished off.
Very informative thanks brother
Nice work! You make it look easy..I woulda had that grease all over the place..lol..
We use a oil based paint to check gear mesh at the dealership I work at. It dissolves in the gear oil over time so no worries.
+kevin o Thanks! Good to know.
+kevin o Also, check each direction separately. If you try to check both directions, you'll usually contaminate the previous direction pattern on the ring gear with the opposite rotation.
You make it look so easy
I checked last night & its the as yours I appreciate you helping me
+Stubbs21 Great! No problem.
+AGearHead4Life
Yo, Abaldhead4life,
How did the "Lincoln Locker" hold up? Did it actually provide posi traction?
Why did you pull it?
+AGearHead4Life
I didn't think you'd reply, thanks. I'm doing the same thing your doing thats how I found your video. I'm going from a Muncie 4 speed to a Tremec 6 speed and installing an Ectec locker. Thanks Im a GM guy also.
+Skeefoo Panama yesssir! So far, I've been able to reply to every post that I've gotten since I started this channel. I try my best to give feedback and help others out. It looks like I'll soon not be able to keep up with the flow of comments though. We'll see how it goes. Cool man! Good luck on your build! But most importantly, Keep on Wrenchin!
Damn, I remember watching this when I was 16 in highschool looking at those prices in horror.
Now I got the whole setup and installed thanks to this video that I remembered about from years ago 😂
Good video. I’m gonna install one on the tail of my 4x4 85 Chevy K10. Semper Fi
Nice pair of flip flops 🩴 you have there!
This was a great video. 👍🏼👍🏼👍🏼
Semper Fi Gear head, nice vid!
thanks man good info im on it
27 people need there finger broke lol.thanks brother for taking the time to show us how to do this .rear end have always been my weak spot
+William Swanson Thank you William! Good luck!
Great timing on this video! I have a Torsen LSD to go in the El Camino, which is also an 8.5" 10 bolt unit. Now you need to make a video on how to convert from rear drum brakes to Camaro LS rear disc brakes.
Thanks Rick! I may wind up doing that conversion if I find out that I can fit my 15" rally wheels over those brakes.
czcams.com/video/0z79D14fyQk/video.html here you go Rick. He did most of the conversion in real time
Thanks, Victor! That will be very helpful. Now, if you could do something about this cold weather....
@@AGearHead4Life Camaro brakes have wrong bolt pattern. Use 94-96 Caprice/Impala
For truck 5X5" bolt pattern or 79-85 Seville
I just stumbled across your video and I have to say it was a fantastic instructional. Thank you.
Additionally, I also do a lot of my mechanic work in my OSHA approved flip flops..... we could hang out.
Good vid bro!! Thanks!!!
Love the video really helps a lot!
Thank you Justin!
USMC Ron great video! Semper Fi
miss your videos man, hope you and your family are safe brother
Good video. I couldn't wear flip-flops however because it seems I am always dropping or knocking something off the bench, lol.
+Greg Beckham lol Thanks Greg! Yea, I'm waiting to see how long it takes for me to learn my lesson.
I'm wanting to regear and put a locker in my 93 suburban, and all though I have never did a gear swap, I like to do my own work..does take some special tools that cost more money, but I also have a jeep that I want to reheat, so maybe it wil be worth it..your skill level and confidence makes it look easy...oh, and my sister would like your video just based on the Glenn Danzig song playing..shes got two daughters but for some reason she loves a song with a man warning mothers to not let their children walk his way..ha ha...well, I'm not the most logical person either.
We all know the 10-bolt catches a lot of flack from people, but for a sub 30" tire with a not so sticky tire, it's a good diff as long as you don't beat on your truck harder than you should.
Great Video
Thank you Dan!
very neat installation..i am planning to do one on mine to improve wet drive-ability...
+Farooq Ishaq Thank you! You'll enjoy having it. I can't have a vehicle without "limited slip", especially a truck.
Good tutorial!
SEMPER FI BROTHER, THANKS FOR THE VIDEO
Psycho Bettie Glad you dig it! Simper Fi brother!
thank you very very much. Upgrades coming soon!!
+syscocar Awesome! Good luck!
Love the song in the background. Lol danzic