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How do I identify a GM 10 bolt posi?

How do I identify a GM 10 bolt posi?

Hear this out loudPauseThe 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.

How big is the rear end of a Chevy 10 bolt?

Nothing could be further from the truth. The 10-bolt can handle just about anything you throw at it, as long as you use the right axle, either the 8.5- or 8.6-inch. That is the great caveat; there are four sizes of 10-bolt GM rear ends: 7.5/7.625-, 8.2-, 8.5-, and 8.6-inch.

What kind of differential does a 1982 Camaro have?

The most common GM unit for the 1982 to 1992 Camaro is the Saginaw style 10 bolt Chevy differential. The “Third Generation Camaros” were available with both rear drum brakes and rear disk brakes. The hand brake is slightly different for each. The throw (distance of pull) is greater for the disk brake.

Where are the code stamps on a 10 bolt Chevy?

While the 10-bolt rearend’s lineage can be identified by the code stamps, which are usually on the passenger’s side axle tube, there are literally hundreds of potential codes for the three different 10-bolt rearend housings. Since listing them all within this article is impossible, we’ll be focusing only on visual identification.

How big is the pinion nut on a 10 bolt Chevy?

The covers on the 8.5-inch rearends are often 11 inches round with a bulge on the driver’s side to accommodate the ring gear. The distance between the lower center bolt on the cover and either adjacent bolt is 3 3/4 inches. The OEM pinion nut is 1 1/4 inches.

What’s the casting number on a Camaro 10 bolt?

The 8.2 Camaro 10 bolt should have casting number 3894859NF See this ink for how to tell difference of 8.2 versus 8.5 – check size of the pinion nut. For a First Generation Camaro the measurement of backing plate to backing plate should be about 53.25 inches.

How to identify a 10 bolt, 8.5 inch posi rear end?

Most of the 10-inch units you’re looking for will have this. Place your 1.25-inch socket over the pinion nut. If it fits, it’s the 10-bolt, 8.5-inch unit. Inspect the entire gear case and center section thoroughly to make sure there are no cracks or other damage that might compromise the unit’s integrity.

How big is the rear end of a GM 10 bolt?

When it comes to getting power to the pavement, GM’s 10-bolt, 8.5-inch rear end with Positraction is a hero. Like Superman in street clothes, however, it can be hard to identify this beefy unit among its weaker cousins, the 10-bolt, 8.2-inch with open differential.

How big is the pinion on a Chevy 10 bolt?

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.

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Ruth Doyle