Chevy 10 Bolt Rear End Gear Ratio Chart

Chevy 10 bolt rear end gear ratio chart Randys carries gm differentials from the small 6 5 as found in the chevy vega up to the larger gm 11 5 common under 3 4 and 1 ton trucks from chevrolet and gmc. 1958 1970 chevy rear differential code identification using the charts below you will be able to learn alot about the rear differential in your classic full size chevy.

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7 2 and 8 5 inch.

Multiplying the 2 48 first gear by the 4 10 rear axle results in a final drive ratio of 10 16 1 2 48 x 4 10 10 16. Chevy 10 and 12 bolt axle assemblies have been standard equipment on gm passenger cars muscle cars and trucks for decades. However the smaller 10 bolt unfairly gained the reputation as a weak.

Like all chevy 10 bolts the axles are retained by c clips on the inner end of the axle shaft inside the carrier. If your looking for more power or performance you would switch to a lower ratio. 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.

After that gm instituted the corporate rear end a 10 bolt rear end that integrated feartures of both the 10 and 12 bolt rear ends. Inside the 8 2 inch 10 bolt the ring gear bolts have 9 16 inch socket heads with 3 8 24 left hand threads. Gm did make another 10 bolt axle for earlier cars that has a similar size and shape cover but this axle has only an 8 2 inch.

For most street performance applications a 10 1 final first gear ratio is. The pinion diameter is 1 438 inches and has 25 splines. Gm differential identification specs.

The 10 bolt differential cover is located on the rear of the axle and is an 11 inch x 10 25 inch oval. It s just backwards from the way we think if you have a 4 10 ratio and need better fuel mileage you would switch to a 3 42 or 3 73 gear ratio. Rear ends with measurement designations are named after the diameter of the ring gear i e.

The gear ratio codes are located on the front passenger side of the differential as shown in the illustration below. If you have a 3 42 rear end ratio and need more towing power you would switch to a 4 10 ratio. Rear axle gt8 4 10 gt7 rear axle 3 33 gt8 rear axle gt5 4 10 gu1 rear axle 2 41 gu2 rear axle 2 73 gu3 rear axle 2 93 gu4 rear axle 3 08 gu5 rear axle 3 23 gu6 rear axle 3 42 gu7 rear axle 2 77 gu8 rear axle 3 90 gu9 rear axle 3 91 gv0 rear axle 3 55 gv1 rear axle 2 73 gv2 rear axle 5 83 gv3 rear axle 3 08 gv4.

According to nasty z28 the gm chevrolet 12 bolt rear end was manufactured from 1965 through 1971. Gm rpo codes or general motors regular production option codes contain lots of valuable information about your gm vehicle. Gm differentials come in a wide range of sizes.

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.


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