how do i identify my gm rear end
GM RPO Codes or General Motors Regular Production Option codes contain lots of valuable information about your GM vehicle. VISUAL AXLE DIFFERENTIAL IDENTIFICATION.
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GMC CHEVY REAR AXLES.
. 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. Find your GMCChevy vehicle in the chart below and click on the illustration for a larger view. General Motors rear end differentials are referred to by the diameter of the ring gear ie.
For a 373 ratio there may be 41 teeth on the ring gear and 11 on the pinion for 372. The oval-shaped cover measures 8 516 inches by 10 916 inches. The axle ratio is derived from dividing the number of teeth on the ring gear by the number of teeth on the pinion gear.
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. 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 Identification tag in the glovebox. Fortunately you can tell a lot about a rear axle by its shape and number of bolts on the differential housing.
However road debris dirt grime and general age can obscure these numbers. Accurate Differential Identification is the first and most important step in your differential repair upgrade or overhaul project. 11 rows The best way to be sure of which axle you have is by the Bill of Material Number stamped on the right hand axle tube.
The following is a complete list of GM RPO axle codes for Chevy and GMC vehicles starting with the letter F. The inspection cover is on the back of the housing seen by looking. See the Spicer Axle Identification information.
Dana Spicer and Ford Differentials can be identified most accurately by the tag number or axle tube stamp. Compare the gasket shape with the chart found on the Drivetrain site see References section. The nomenclature actually refers to the number of ring gear bolts.
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 identification and most other makes of truck. If on the other hand the rear-end measures only 42 716-inches then we. How to Identify a Chevy Rear End.
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. In the absence of an ID tag axle differential types can be identified using the shape of the cover the number of cover bolts the number of ring gear bolts and the ring gear diameter. If in doubt consult one of our differential experts at 800510-0950.
Count the bolts on the rear-end housing and visually identify the rear-end gasket shape. Ford 75s and 88s have 10 bolts the 1025 has 12 and all Dana units have 10 bolts but each has a different gasket shape. Although the 75-inch 10-bolt closely resembles the 85-inch housing you can positively identify the Chevy 75-inch rearend by measuring it.
Looking up the GT4 code via Google or any GM reference literature the code shows your truck has a 373 gear ratio. Our experts will help you find the correct ring and pinion set for your particular application. The axle gears are a part of the differential and are located behind the inspection cover on your axle.
Give us a call at 800-216-1632 to get started. Identifying the 10-bolt axle is easy. 75 inch 85 inch 105 inch.
If the housing measures 45 38-inch between the centerlines of the leaf spring perches then this is a GM corporate 85-inch 10-bolt for a second generation Camaro. Professional technical support is available. The distance between the bottom center bolt in the cover and its adjacent bolts is 3 14 inches.
Therefore you need be able to choose the more desirable 85- or 86-inch and avoid the smaller 757625- and 82-inch units. Count the number of inspection cover bolts on the rear end housing. Use the images and information listed below to help identify which differential your vehicle has before ordering parts.
The following information is provided to help you identify the differential you are working on. You can typically find your RPO code on driver side door panel or glove box. You need to be able to accurately identify the GM 10-bolt.
Accurate identification using the GM RPO code assumes that the rear end. 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.
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