The General Motors Corporate 10 bolt axle has been used GMC and Chevrolet pickups since 1977. The "Corporate" 10 Bolt is significantly stronger the standard 10 Bolt axle used in cars; the Corporate model has a larger ring gear and pinion shaft diameter. Most people refer to the Corporate 10 Bolt as simply the "10 Bolt", as we will from here on. GM developed their own axle as a replacement for the Dana 44 in both front and rear configurations. It is very common, especially front ends, in GM pickups and thus they are easy to come across. A weak link is the fact that the axles are secured by c clips, which are prone to failure. Fortunately, the aftermarket has responded with C clip eliminator kits, which makes the axle a much more desirable package on the trail. In 1999, the 10 Bolt's ring gear was increased from 8.5" to 8.625"
GM 10 Bolt Specs
Common Applications: |
Front: 1977 - 1987 K10/K15/K20/K25, 1979 - present Blazer |
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Rear: 1982 - present K10/K15, 1978 - present C10/C15 |
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Full/Semi Float: |
Semi floating, front and rear |
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Ring Gear: |
8.50" (1977 - 1999), 8.625" (1999 - present) |
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Axle Spline Count: |
28 spline outer, 30 spline inner axle shafts |
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Axle Tube Diameter: |
3.0" |
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Pinion Diameter: |
1.625" |
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Pinion Spline: |
30 spline |
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Ratios: |
2.56 - 4.56 |
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Carrier Break: |
2.56 | 2.73 |
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Identification: |
10 Bolt Front Axle Housing |
10 Bolt Rear Axle Housing |
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