how do i identify my gm rear end

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. Information about Differentials in GM vehicles can usually be obtained by looking at the RPO or Regular Production Option codes contained in the Service Parts.

Rearend Identification

General Motors has a wide range of front and rear ends.

. The last three numbers are the gear ratios. The inspection cover is on the back of the housing seen by looking forward under the license plate at the rear of the vehicle. General Motors rear end differentials are referred to by the diameter of the ring gear ie.

Raise and support the rear of the vehicle with jack stands. Identify your GMC or Chevrolet rear end gear ratio by the. We make it easy to verify your exact rear end by.

Count the number of inspection cover bolts on the rear end housing. The axle ratio is derived from dividing the number of teeth on the ring gear by the number of teeth on the pinion gear. 22 hours agoChevy Truck 12 Bolt Rear end Identification.

This tag which is always present if not removed by a. Read the metal tag attached to one of the differential cover bolts. The following is a complete list of GM RPO axle codes for Chevy and GMC vehicles starting with the letter F.

Not all vehicles are set up the same even though they may. For a 373 ratio there may be 41 teeth on the ring gear and. There are several ways to identify the axle under your vehicle.

Still the 14-bolt semi. Shop by your differential. To help you find the right part we first need to properly identify the axle you have or need.

GM RPO Codes or General Motors Regular Production Option codes contain lots of valuable information about your GM vehicle. For example Mark Williams offers new 12 bolt housings. Its worth noting that rear axles can sometimes be positively identified by a casting number and date stamped on the differential cover or axle tube.

Compared to the 14-bolt full-float axle the 14 bolt semi-float has a smaller ring gear 95 and the axle shaft can not be removed without also removing the wheels. You can typically find your RPO code on driver side door panel or glove box. It is a round cover fastened with bolts used to gain access to the differential gears.

75 inch 85 inch 105 inch. GM Vehicles come with RPO codes which are 3-character codes that designate various features options on your vehicle. GM Chevy - Differential Identification.

Rear Axle Identification. 152 rows Identify your GMC or Chevrolet rear end gear ratio by the RPO Codes usually. The 12-bolt was used in many vehicles.

Although the 75-inch 10-bolt closely resembles the 85-inch housing you can positively identify the Chevy 75-inch rearend by measuring it. 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. RPO codes can be found by referencing the Service.

Please select a rear end that matches your vehicle below. We carry everything from the 725 IFS front end parts to the large 115 rear end parts for 1-ton trucks. Just like a 10-bolt rearend there should be stamped numbers on the axle tube on the passengers side.

GM differential identification is easy the diff can be accurately identified by the bottom line of the tag number or axle tube stamp this also applies to Dodge rear end. However road debris dirt. Please open the attached documents to see pictures of.

Having a visual reference is probably the easiest way.

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