Question: How Do I Identify My GM Differential?

How do I know what Chevy differential I have?

The two most common ways to identify your differential are establishing your Chevy truck axle identification through axle tags, or the shape of your differential cover..

How do I know what size rear end I have?

Measure the diameter of the ring gear. This measurement equals the size of your rear end. Count how many bolts are on the inspection cover. If you have 10 bolts, then your Ford has a 7.5-inch or an 8.8-inch rear end.

How much horsepower can a Chevy 10 bolt rear end handle?

about 450 HP7.5” 10 bolt GM rear: It will take up to about 450 HP IF the axle tubes are welded to the housing and either a differential cover with preload bolts is installed or straps are installed over the carrier bearing caps along with longer bolts.

Does VIN number tell gear ratio?

The vehicle identification number (VIN) is a 17-digit code that is used to identify and track every automobile produced. … The codes on that tag will tell you the gear ratio. The VIN will not give you gear ratios in most cases.

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 I have a limited slip differential?

The easiest way to tell if you have an open differential is to jack up the car and spin one of the rear tires. If the other wheel spins in the opposite direction, you have an open differential. If it spins in the same direction, you have a limited slip differential, or LSD.

How do I identify my GM rear 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.

What are GM RPO codes?

A Regular Production Option (RPO) is a General Motors standard coding for vehicle configuration options and began in 1970. These codes are a combination of 3 alphanumeric characters and refer to a specific option or modification to the vehicle including the paint color.

How do I know what Trailer Axle I have?

First, if the trailer was pre-made by a specific company, you may be able to find this information in either the paperwork or on a placard somewhere on the frame. Sometimes, the axle identity is stamped into the axle itself or into the hub if it was purchased as a complete assembly.

How much horsepower can a GM 12 Bolt handle?

500 hp14. A complete 12-bolt rearend with drum brakes weighs around 185 pounds. It uses 2 to 3 percent less power than a 9-inch and even factory pieces are capable of withstanding 500 hp using 30-spline axles.

Is a 10 bolt rear end good?

As long as your tires never completely hook when the power is applied from a dead start, such as at the drag strip, a weaker rear axle like the 8.2-inch 10-bolt will likely survive. That’s the short answer.

How do I find my GM gear ratio?

To find the axle gear ratio of any GM vehicle, locate the RPO sticker (typically located in the glove box) and write down any codes starting with F, G, or H.

How do I identify my differential?

Without an ID tag, differentials are identified by the number of cover bolts, the distinctive shape of the cover, the number of ring gear bolts, and ring gear diameter. They can also be identified by whether the center section is an integral or dropout design.

What type of fluid goes in the rear differential?

Every front or rear axle is filled with a special oil (also called differential fluid, or gear oil) that takes care of this. The differential fluid lubricates the gears, bearings and other internal parts, and provides cooling to these components as well.

What are the different types of differential?

Different typesAn open differential (OD) is the most common type. … A limited slip differential (LSD) overcomes this problem. … A locking differential (locker) is able to lock the two drive wheels on an axle together. … A spool is an open differential in which the axles have been mechanically fastened together.

How much horsepower can a GM 7.5/10 bolt handle?

A stock WS6 puts out 345 ft lbs of torque (And a theoretically under rated 320hp). That’s about all the 10 bolt can *reliably* handle with the stock tires and a stick shift. I’m on my 3rd unit with a mostly stock motor, good suspension, and sticky but street legal road race tires.

What does 9 inch rear end mean?

Ford had other differentials that unbolted from the front, however, the term 9-inch refers to the outside diameter of the ring gear and Ford’s other third-member offerings has a pinion gear that was somewhat smaller. The 9-inch ring and pinion is front-loaded into the rear end housing.