Quick Answer

Quick Answer: 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.

How do I identify a GM 10-Bolt gear ratio?

Rearends with open differentials usually have a tag located on the left lower cover-mounting bolt. Inside the differential cover, the ring gear will be marked with tooth counts such as 10,41 for 4.10:1, and so on. The 10-bolt differential cover is located on the rear of the axle and is an 11-inch x 10.25-inch oval.

How do I identify a GM 10-Bolt differential?

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 do I identify my GM rear differential?

If the ID tag or stamp is missing or unreadable, differentials can be identified by the number of cover bolts, the distinctive shape of the cover, the number of ring gear bolts, and ring gear diameter.

How do you tell if you have a 10-bolt or 12 bolt rear end?

Just like a 10-bolt rearend, there should be stamped numbers on the axle tube – on the passenger’s side. The numbers should let you know what gear-ratio came from the factory, the date of production, where the unit was assembled, and whether the carrier is Positraction or not (see charts).

How can I tell what rear end is in my Chevy truck?

You can typically find your RPO code on driver side door panel or glove box. General Motors rear end differentials are referred to by the diameter of the ring gear, i.e. 7.5 inch, 8.5 inch, 10.5 inch.

What size is the pinion nut on GM 10-Bolt?

PYN10 – 10-Bolt 8.5″
Pinion Nut (30 Spline Pinion)

How do you find the gear ratio on a GM rear end?

Count the teeth on the small gear in the forward part of the axle housing, called the pinion gear. Count the number of the teeth in the big ring gear attached to the differential. Divide the number of teeth on the pinion into the number of teeth on the ring gear. This is the gear ratio.

How do I know if my 10-bolt is posi?

Locate two lugs, or ears, extending out from the bottom of the gear casing approximately in the 4 o’clock and 8 o’clock position. This will firmly identify the unit as having come with Positraction from the factory.

What rear end do I have by VIN?

Identify the VDS section, the fourth through eighth digits of the VIN. This section typically includes information such as the vehicle model, engine size and body type. While not every vehicle manufacturer includes gearbox ratio information in the VDS, this will be where the information is found if it was included.

How do I know what size rear end I have?

How to Identify Your Differential &amp
Axle Type | Differential Tech Tips

How can you tell if a bolt is 8.5 10?

GM 8.2 10 Bolt vs 8.5 how to tell the difference

How do I know if my Chevy posi is rear end?

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 &amp
Pinion’s differential types web page (see References).

Are 3.73 or 4.10 gears better?

4.10 is the typical gear ratio for a high-performance vehicle like a sports car or SUV because it provides better acceleration than 3.73 because of the faster second and third gears, which provide more torque at lower speeds to accelerate from a stop.

What size is a GM pinion nut?

1 1/8″ Socket, 7/8″ X 16 Thread.

What size is pinion nut Silverado?

Yukon Gear – Pinion Nut (Part No.

1 1/4″ socket, 7/8″ x 14 thread.

What size is the pinion nut on a 14 bolt?

10.5″ GM 14 bolt truck pinion nut. 1 1/2″ socket, 15/16″ x 16 thread.

How do I find my Chevy axle ratio by VIN?

The gear ratio is usually listed in the VIN code located on driver’s door, the glove box, or the ID plate on the dashboard. Count the times a rear wheel goes around for one driveshaft turn: if its 3 1/2 it’s a 3.50:1. Divide the number of teeth on the ring gear by the number of teeth on the pinion gear.

What gear ratio do I have by VIN?

The Vehicle Descriptor Section (VDS) of the VIN will carry information for the gearbox ratio if the specific manufacturer includes it. If not, you might need to take help from a trusted VIN decoder website or find out manually.

What gear ratio is a GT4?

In stock configuration, the GT4’s 3rd gear is a somewhat lofty 1.41:1, while the Sharkafied car receives a 1.65:1 ratio.

Is Posi the same as limited slip?

Registered. Posi and limited slip are both the same thing. Standard rear end “Peg leg”, both back wheels always propel the car but the power goes to the wheel that spins the fastest. So if one side spins out, all the power goes to that wheel..

What the difference between a posi and a locker?

With a locker both wheels will spin at the same speed. With a posi it allows the wheels to turn at differenthe speeds. When turning the inside wheel needs to turn slower than the outside .