Torque specs chevy 10 bolt rear end

Known alternatively as the GM 8. Lighter and more efficient than its Ford 9-inch and Dana 60 rivals, the bolt enjoys as much use amongst brand-loyal off-roaders as it does among drag and road racers. The bolt derives its name from the number of bolts in its differential cover, which distinguish it from all other General Motors GM axles.

torque specs chevy 10 bolt rear end

The bolt can use either an oval-shaped or irregularly shaped gasket, but cover bolt torque comes in at 20 foot-lbs. Pinion bearing pre-load, a critical parameter, determines the amount of resistance to movement imposed by the pinion bearing. Miss this crucial measurement by even a few percent and your bearings will wear out far before their time, and the differential case itself may crack in half under high temperatures and extreme stresses.

Used pinion bearings should resist rotation at the rate of 10 to 15 inch-lbs.

GM 10 Bolt 8.5" Posi Install "How To" Chevy C10 Truck - Eaton Truetrac

Carrier backlash, the distance between the differential carrier unit and the carrier bearing housing in the case, largely determines the contact area between the ring and pinion gears. The bolt uses shims set between the carrier and carrier bearings to set backlash, which should ideally land between 0. However, backlash may vary depending on the desired contact patch between ring and pinion gear. The ring gear bolts to the differential carrier and transmits power from the pinion to the differential unit itself.

Torque the ring gear bolts to 90 foot-lbs. The differential's side bearing caps, equivalent to the main caps in your engine, hold the carrier unit to the case. Always use new carrier bearings, plenty of assembly lube and blue thread locker when installing the side bearing caps, and torque the retaining bolts to 60 foot-lbs.

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Backlash Carrier backlash, the distance between the differential carrier unit and the carrier bearing housing in the case, largely determines the contact area between the ring and pinion gears. Ring Gear Bolts The ring gear bolts to the differential carrier and transmits power from the pinion to the differential unit itself.

Side Bearing Caps The differential's side bearing caps, equivalent to the main caps in your engine, hold the carrier unit to the case. About the Author This article was written by the It Still Runs team, copy edited and fact checked through a multi-point auditing system, in efforts to ensure our readers only receive the best information.If transmissions are shrouded in mystery, then the rear differential follows on its coattails.

torque specs chevy 10 bolt rear end

Unlike transmission building, rebuilding a rear end is basic nuts and bolts stuff, but that comes a caveat- the set up is the tricky part. Backlash, pinion depth and wear patterns are science and art mixed together, and there are a few specialized tools required.

Being the single most use rear differential on the planet, we show you want goes into saving an aging GM 8. Gear oil is nasty stuff, mostly in smell. The rear end is full of it. It has to be drained to get a peak inside. While this article focuses specifically on the GM 8. Built from the s through today the 8.

The most typical breakdowns of the rear end is the wheel bearings. These do not require a complete rebuild, but they do require complete disassembly for cleaning. A bad wheel bearing will send a lot of metal shavings through the gear oil. A bad wheel bearing will make a loud howling sound when the vehicle is driven.

The howl is constant, it does not change with acceleration or stopping. A tell-tale sign of a bad bearing is a leak of gear oil on the inside of the tire. If not repaired, a bad bearing can seize, causing an unsafe driving condition.

The differential carrier holds the ring gear and connects the pinion gear to the rear axles. This unit shown is an open-type, no posi.

When things get more serious, the rebuilds get more intense. The bearings on the pinion gear and differential itself can go out, which cause a similar howl to wheel bearings, only the sound will change if you accelerate or brake. Usually, a bad pinion bearing howls when you are not accelerating. This can also be a sign that the gears are worn or out of mesh, so any type of howling noise should be inspected immediately. This is a C-clip. Most rear ends use these to hold the axles in place.

When these break, the entire axle and wheel assembly falls out. Clunking, banging, and vibrations can also be a sign of worn rear end components, including broken gear teeth, a damaged rear differential carrier, and bent axles. Replacing these parts as soon as possible is the key to minimizing your repair costs, and reduced the risk of a catastrophic failure. This one spins both wheels under power, unlike the open-style off on the right.

Some people trash talk the GM bolt as a junk rear end, and if they are talking about the 8. Since both the 8. All 8. Up untilall GM 8. Finding spline axles is easy, you just have to take some measurements and order them. You should also check to see if the rear carrier is posi or open-style, the easiest method is to jack up the rear of the car and spin the wheels, if they both spin the same direction, you have a posi, if they spin in opposite directions, you have the classic peg-leg rear.

Our 8. While we could have stayed with the open carrier and spline axles with no real consequences, posi is so much better. The TrueTrac comes in both and spline versions and we chose the spline. That meant we needed new axles.Discussion in ' Gear Central ' started by BigredmarinerOct 24, Log in or Sign up.

Truck Forum - Truck Mod Central. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More. Oct 24, at AM 1. I will attempt to cover the necessary steps in building a differential for a GM 10 bolt rear end with an 8. These basic steps should pertain to most GM rear differentials and if followed with leave you satisfied for many miles.

To start you want a bare differential, for tear down refer to this thread. Tools needed: Basic hand tools, brass punches, hammers, slide hammer puller, bearing pullers, torque wrench, inch pound torque wrench and a shop press. An appropriate jack and jack stands or a lift if you have one. You will also need a set of good slide caliper or a 1 inch micrometer, a dial indicator with magnetic base, your setup bearings and gear paste. Yukon Gear Ring and Pinion installation instructions.

Oct 24, at PM 2. You have your tools assembled, now to the parts. For lower mileage diff's a lot of folks skip doing the axle bearings and seals, that's your call. My diff has K miles on it so I didn't want to take a chance on having to tear back into it for some relatively cheap bearings. Detroit True Trac: Yukon Gears, 4. You can order them with your install kits or you can pick these bearings up locally.

A word of caution: I have usually pulled the old pinion bearings and used them for setup bearings, but I found on this set that the factory bearing and the new bearing where different by about 0. That is a ton of difference and had I used the old bearing for setup, final assembly would have been way out. Truth be told, with that big of a difference the carrier probably wouldn't have even been able to fit the housing.

My solution, take the inner pinion bearing from your kit. Go to your local parts house and pick up an identical bearing that you can use as a setup bearing. The outer pinion bearing that you have removed from the original setup can be used as a setup bearing regardless.

All you are needing is for the pinion to be centered. Depth of the pinion will be set by the inner bearing and shims. Oct 24, at PM 3. Prepare your housing, make sure to properly clean your diff housing of all gunk and possible metal shavings from your old setup.

Blake clean, diesel or any suitable solvent will work for this along with a bunch of old rags. Clean is the key here. Axle Bearing install, take your new bearing and place it into the housing. Using a bearing driver or brass punch drive the bearing into the housing until it seats.

If you are using the punch method, make sure to tap it in by alternative taps on the top to bottom to side to side. Use some common sense and it will go smoothly. Now for the seal install, install the axle seal in the same manner as the bearing.

Make sure the seal is completely seated against the axle tube when finished. Install Inner and outer pinion bearing races, do not install the outer pinion seal at this time.The 7.

The control arm-mounting ears on top of this 7. But, did you know there is more than one style of bolt rearend? One is the small, 7. The 8. It first appeared in production cars as a corporate replacement for the 8. It was used in different models by all GM divisions — with the exception of Cadillac. Although the 7. Inside, the ring-gear bolts are the same as the 8. Like most bolts, the axles are held in place by C-clips on the inner end of the axles.

Date and location of manufacture are stamped in the axle tube, and this table deciphers the code. If used in a daily driver or cruiser application, the 7. This is an 8. It is internally different from the 8. However, the gears will not interchange with a Chevy 8. The axle shafts are also held in place by four-bolt retainer plates at the outer bearing, not C-clips. There were an untold number of 8.

Again, this would be okay in a daily driver or cruiser application, but if installed behind an engine with horsepower numbers climbing into the range, you can plan on an eventual failure.

While a carrier-bearing girdle is available for the 8. The easiest way to identify the 8. Inside the 8. The pinion diameter is 1. Like all Chevy bolts, the axles are retained by C-clips on the inner end of the axle shaft inside the carrier. If you find a rearend that uses a large spring perch like this, it is from either an X or F-Body.

GM 10 Bolt Rebuild Instructions

While the 8. The easiest way to tell the difference is by looking at the brakes. All 8. The X and F-body spring perches come in two versions: mono-leaf left which is shallower than the multi-leaf right.Gain extra benefits by becoming a Supporting Member Click here find out how! Send Private Topic View Profile. I had a similar problem once, I was replacing a broken yoke. I went to a mechanic friend and he said that your best route is to put the yoke on and tighten it until there is no back and forth play in the bearings.

I'd make a ring that slipped over the beam handle, as welding onto the beam might just take the temper out of the beam, and make readings incorrect.

It's been centuries since I bought that torque wrench, don't even remember where I got it, but, it is a Craftsman, a very old, but accurate Craftsman. Using a holder fixture in the U joint bolt holes in the yoke IS. Execution time: 0. All times are GMT Pacific. Current time is AM Top. Attach Photos to Posts. Contact Us. My Cookies. Frequently Asked Questions. Forum Rules. With a 10 bolt rear end?

And is locktite advised when installing it if so what color blue or red? Crate Edelbrock intake,cam and carb.

torque specs chevy 10 bolt rear end

The pinion has a crush sleeve in it that - if you over-torque it, will crush excessively and accelerate the gear wear and it will whine a lot and possibly self destruct if bad enough.

What you WANT TO DO is to count the number of threads sticking out of the pinion nut write it down - then mark the pinion nut and shaft in relation to each other so you can tighten the nut back down to the exact spot it was before you took it off - so the crush sleeve doesn't get damaged.

The lock thread whether plastic or a metal crimp style keeps it from coming undone. Measure the depth of both of the yokes where the shaft splines are cut into the yoke to make sure they will fit in place of one another.

You can use locktite if you want, but I wouldn't use red - blue is good enough. The yoke nut is already off my truck due to me replacing the yoke i didnt count the threads i thouight it would just torque back on What should i do now?

Words are a lot like toothpaste Once its out of the tube, there's no getting it back in You may get close to the original place. Dangit next time i will do my research first before i dig into it. I dont want to destroy the rear end.Speedway Motors employees enjoy not only helping our customers, but also turning some wrenches in their downtime as well. Take Zach R. Zach got enlisted by a friend to help rebuild the 7.

Follow along as Zach works over the old 10 bolt and brings it back to life. Upgrade your cam, intake, headers, stall converter, and the list goes on from there. One intimidating part for a lot of guys is the rear end. Recently a friend enlisted me to help rebuild his 7.

We started by getting a rebuilt kit from Motive Gear. This ring and pinion install kit comes with new pinion bearings, carrier bearings, races, crush sleeve, pinion nut, pinion seal, a gasket and even has the gear marking grease included. Before disassembly, we marked the bearing caps and kept the side bearing shims on the correct side. This will ensure that your backlash is correct without having to swap the shims.

Next we disassembled everything, starting with the cross pin bolt, cross pin and C clips. After that we removed the old bearings and cleaned all the parts up in the solvent tank. Once you give everything a thorough inspection you can begin the re-assembly process. Note: The 7. Many times when you are rebuilding an existing rear end you want to save the original pinion bearing shim and re use it under the new bearing.

We pressed the new bearings onto the carrier and the front pinion bearing and went ahead and put the assembly together into the housing.

Pinion torque specs?? Plz help

An important step I like to take is to assemble the pinion and differential case without the crush sleeve or the new pinion nut. This allows you to put the pinion gear in, set the pinion bearing pre-load, set the backlash and then run a contact pattern without the chance of compressing the crush sleeve too much.

We were lucky and had a desirable contact pattern on both the drive and coast sides of the gear teeth. However, when you have new gears, a new posi unit, and other variables like mixing housings with differentials you might have to try multiple shims to get a good pattern. Now that we know our pinion depth shim is correct we can do the final assembly.

One thing often overlooked is the RTV sealant that needs to be applied to the splines otherwise rear end grease can leak past the splinesand locktite on the new pinion nut. I also like to put some oil on the seal surface of the yoke to avoid tearing the new pinion seal.

When compressing the crush sleeve, many guys use an impact wrench and end up crushing it too far, ruining the sleeve. The correct way to do this is to use the yoke lock part of the setup tool kit we bought and use a breaker bar with a cheater pipe. I like to slowly tighten the new pinion nut until I take up all of the front to back free play. From there I make very minute changes, checking the pre load with the inch lb torque wrench several times.

This is very important, because if you go too far the crush sleeve will be ruined.If transmissions are shrouded in mystery, then the rear differential follows on its coattails. Unlike transmission building, rebuilding a rear end is basic nuts and bolts stuff, but that comes a caveat- the set up is the tricky part. Backlash, pinion depth and wear patterns are science and art mixed together, and there are a few specialized tools required.

Being the single most use rear differential on the planet, we show you want goes into saving an aging GM 8. Gear oil is nasty stuff, mostly in smell.

The rear end is full of it. It has to be drained to get a peak inside. While this article focuses specifically on the GM 8. Built from the s through today the 8. The most typical breakdowns of the rear end is the wheel bearings.

GM 10 Bolt Rear Gear Install & Setup

These do not require a complete rebuild, but they do require complete disassembly for cleaning. A bad wheel bearing will send a lot of metal shavings through the gear oil. A bad wheel bearing will make a loud howling sound when the vehicle is driven.

The howl is constant, it does not change with acceleration or stopping. A tell-tale sign of a bad bearing is a leak of gear oil on the inside of the tire. If not repaired, a bad bearing can seize, causing an unsafe driving condition.

The differential carrier holds the ring gear and connects the pinion gear to the rear axles. This unit shown is an open-type, no posi. When things get more serious, the rebuilds get more intense. The bearings on the pinion gear and differential itself can go out, which cause a similar howl to wheel bearings, only the sound will change if you accelerate or brake. Usually, a bad pinion bearing howls when you are not accelerating.


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