The rear cover’s shape and the number of bolts are identifying features for GM rear differentials. The round 10-bolt cover with a bulge for the ring gear identifies this axle assembly as an 8.5-inch 10-bolt. The two lugs on the lower case at the 5 and 7 o’clock positions are also identifying features.
How can I tell what 10 bolt rear end I have?
The easiest way to identify the 8.2-inch rearend at a glance is by the shape of the housing and the spacing between the lower bolts on the cover. The 8.2-inch 10-bolt has a smooth, round, lower-case area (no cast-in protrusions), with an 11-inch cover that has a diagonal protrusion at the top.
Are 10 bolt and 12 bolt axles the same?
12 bolt axles have 30 splines, 10 bolt have 28, but yet both axles are the same lenth and diameter. That means that if the 10 bolt had a 30 spline carrier the 12 bolt axles would bolt in.
How can I tell what rear end is in my Chevy truck?
All Chevrolet rear ends can be identified by comparing the gasket shape to an identification chart similar to the one found on Drivetrain’s differential identification page (see References). A visual chart of different GM/Chevrolet rear ends is found on Ring & Pinion’s differential types web page (see References).
How do I know if I have a posi rear end?
There is a two- or three-digit axle code or a production date if the car has Positraction. If the rear end has an open differential, the tag is on the left lower cover-mounting bolt. Another way to check for Positraction is by jacking up the rear end, blocking the front wheels, and putting the car in neutral.
What size is the pinion nut on GM 10 Bolt?
8.5″
PYN10 – 10-Bolt 8.5″; Pinion Nut (30 Spline Pinion)
How do I know if my rear end is Positraction?
If you can turn the wheel on your side while the other wheel is held still, the rear differential is not a Positraction unit. If you cannot turn the wheel on your side while the other person is holding their wheel in place, then the axle is a Positraction.
How do I know if my rear end is posi?
If you cannot spin them by hand, it is a positraction differential. ground and rotate one of the tires. If the other tires spins in the opposite direction, it is equipped with an open differential. If it turns the same direction, it is equipped with a positraction.
Is a 12-bolt rear end posi?
While it was originally designed for use in factory-built performance-rated cars, it was installed in both cars and trucks until 1972. While it is a 12-bolt, it is from a truck. The owner stated that it was not a Posi-filled rearend, and came with gears he believed to be around 3.08 or 3.23.
What is the difference between Positraction and limited slip differential?
The limited-slip differential is similar to the positraction differential, but allows the wheel with traction to have only a limited amount of greater power than the wheel that is slipping. A limited-slip differential will prevent the tire with less traction from separately spinning.
What size rear end is in a s10?
According to Chevy High Performance, the 7.5-inch was standard until 1993, when the previously optional 7.625-inch became standard. 1995 and newer S-trucks equipped with the high-output V6 were equipped with the 8.5-inch rear end.
Is posi limited slip?
TOM: Actually, Jeannie, “posi-traction” is just Chevrolet’s name for limited slip differential on passenger cars. But because of the way the differential works, when one wheel starts to slip, ALL of the power is then delivered to THAT wheel. That doesn’t help you much if that wheel is stuck on snow or ice.
How big is the pinion on a 10 bolt rearend?
The pinion diameter is 1.438 inches, and has 25 splines. Like all Chevy 10-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.
What kind of carrier does a GM 10 bolt differential have?
Description: GM 10 Bolt 8.5 Carrier. Avaialble In standard and heavy duty (HD). Heavy duty case features larger carrier bearings a great upgrade for a stock carrier. Description: If you need traction to both wheels on your GM 10 bolt 8.5 inch differential at a low cost, a Lockright Locker is your answer.
What size is a 10 bolt rear end on a Chevy?
Although the 7.5-inch 10-bolt closely resembles the 8.5-inch housing, you can positively identify the Chevy 7.5-inch rearend by measuring it. The oval-shaped cover measures 8 5/16 inches by 10 9/16 inches.
What kind of locker does a GM 10 bolt have?
Description: The GM 10 Bolt 8.5 inch Detroit Locker is a fully automatic differential locker, if you need a dependable diff locker, that only unlocks when you need it to, the Detroit locker is the best option… More Details » Description: Throw your RTV away!
