how do i identify my gm rear end

How do I identify my Chevy rear end. Rear Axle Identification.

Differential Identification Sierra Gear Axle Sierra Gear Axle Online

Identify your GMC or Chevrolet rear end gear ratio by the RPO Codes usually located on the placard labeled Service Parts Identification inside the drivers door panel or glove box.

. You can spot a semi-float 14-bolt axle by counting the lugs if its a six lug wheel its a semi-float or by looking at the wheel surface. If the vehicle was purchased secondhand this tag may not be valid if. GM RPO Codes or General Motors Regular Production Option codes contain lots of valuable information about your GM vehicle.

There are several ways to identify the axle under your vehicle. The axle gears are a part of the differential and are located behind the inspection cover on your axle. To help you find the right part we first need to properly identify the axle you have or need.

Both of these are semi-floating axles. You can typically find your RPO code on driver side door panel or glove box. Shop Our Inventory Today.

However the smaller 10-bolt unfairly gained the reputation as a weak and inadequate rear end for high-performance applications. Shop Now For The Parts You Need and Make Your Dream Come Alive. A visual chart of different GMChevrolet rear ends is found on Ring Pinions differential types web page see.

Please open the attached documents to see pictures of the cover gaskets and differential covers for many popular rear ends. For a 373 ratio there may be 41 teeth on the ring gear and 11 on the pinion for 372. Give us a call at 800-216-1632 to get started.

All Chevrolet rear ends can be identified by comparing the gasket shape to an identification chart similar to the one found on Drivetrains differential identification page see References. The rugged reliable and efficient Chevy 12-bolt has established itself as the preeminent rear differential for GM muscle cars since its debut in 1965. Learn how to quickly identify the three different variations of the GM 14 Bolt differential - the 95 105 and 115 - and the differences in setup for ea.

On a semi-float axle the axle shaft terminates at the wheel mounting surface. The axle ratio is derived from dividing the number of teeth on the ring gear by the number of teeth on the pinion gear. 75 inch 85 inch 105 inch.

Ad Realize Your Vision. Our experts will help you find the correct ring and pinion set for your particular application. General Motors rear end differentials are referred to by the diameter of the ring gear ie.

But there are several models in the 10-bolt line-up. Some semi-float axles have 8. Read the metal tag attached to one of the differential cover bolts.

Raise and support the rear of the vehicle with jack stands. The inspection cover is on the back of the housing seen by looking forward under the license plate at the rear of the vehicle. Dont Let Missing Parts Hold You Back From Your Dream Project.

A Chevy 12 ton pick-up may have a Chevy 10 bolt rear axle or a 12 bolt rear axle. So there will not be a visible axle end. It is a round cover fastened with bolts used to gain access to the differential gears.

Count the number of inspection cover bolts on the rear end housing. This tag which is always present if not removed by a previous owner will indicate the gear ratio that came with the vehicle originally. Having a visual reference is probably the easiest way.

Not all vehicles are set up the same even though they may be the same make and model. Answer ID 3975 Published 01182011 0818 AM Updated 12182018 0129 PM.

History And Identification Of Chevy 10 And 12 Bolt Chevy Differentials