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GM 12 BOLT TRUCK

69-81 Blazer

64-81 C & K 10 Pickups

65-81 C & K 10 Suburban

65-81 G10/G20 Vans

Cover bolts: 12

Ring gear diameter: 8.875”

Carrier Breaks: 2.54-2.73 / 2.76-3.42 / 3.73-up

Pinion shaft diameter/splines: 1.438/10 (63-64), 1.438/30

Axle shaft diameter/splines: 1.28/17 (63-64), 1.28/30

Available ratios: 2.54, 2.73, 2.76, 3.07, 3.08, 3.42, 3.73, 3.90, 4.10, 4.56, 4.88, 5.13, 5.38


 
Part NamePart CategoryConditionPrice
Coming SoonPinion YokesNew$0.00
Coming Soon

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IWE Rear Ends Only
IWE Rear Ends Only
Part NamePart CategoryConditionPrice
GM 12 Bolt Truck Bearing KitBearing KitsNew$175.00
This kit includes OEM Timken bearings and races along with high quality seals and small parts. Included in this kit are carrier bearings and races, pinion bearings and races, pinion seal, complete master shim kit, ring gear bolts, pinion nut, crush sleave, thread locking compound, marking compound with brush. These

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IWE Rear Ends Only
IWE Rear Ends Only
Part NamePart CategoryConditionPrice
ARB Air Locker GM 12 Bolt Truck 3.73-up RatiosARB Air Lockers And CompressorsNew$1050.00
The ARB Air Locker is a unique air operated unit, for which the locking action is controlled by the driver with a push of a button inside the cab. A 12-volt air compressor engages the unit in approximately 1 second and can be engaged at any vehicle speed. 100% drive

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IWE Rear Ends Only
IWE Rear Ends Only
Part NamePart CategoryConditionPrice
Eaton Posi-Trac 12 Bolt Truck 3.73-up RatiosPosi-tracs / Limited SlipsNew$650.00
Eaton is your traction control solution. With an Eaton you get bullet proof performance, Advanced clutch technology, high impact precision-forged gears, race-bred carbon fiber friction discs, high strength nodular iron case and a 1 year manufactures warranty. This unit is rebuildable. This eaton posi fits a GM 12 bolt truck

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IWE Rear Ends Only
IWE Rear Ends Only
Part NamePart CategoryConditionPrice
Eaton Posi-Trac 12 Bolt Truck 2.76-3.42 RatiosPosi-tracs / Limited SlipsNew$725.00
Eaton is your traction control solution. With an Eaton you get bullet proof performance, Advanced clutch technology, high impact precision-forged gears, race-bred carbon fiber friction discs, high strength nodular iron case and a 1 year manufactures warranty. This unit is rebuildable. This eaton posi fits a GM 12 bolt truck

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IWE Rear Ends Only
IWE Rear Ends Only
Part NamePart CategoryConditionPrice
Detroit Locker GM 12 Bolt Truck 30 Spline 3.73-up RatiosLockersNew$950.00
The Detroit Locker maximizes traction by delivering 100% of the torque to both drive wheels. It is engineered to keep both wheels in a constant drive mode, and has the ability to automatically allow wheel speed differention when required. Applications are also available for C-Clip style axles. No other performance

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IWE Rear Ends Only
IWE Rear Ends Only
Part NamePart CategoryConditionPrice
Detroit Truetrac GM 12 Bolt Truck 30 spline 3.73-up RatiosPosi-tracs / Limited SlipsNew$695.00
Eaton's Detroit Truetrac was the first heilcal gear differential ever introduced into the automotive aftermarket. It remains the leading helical gear-type limited slip differential in the industry. Its helical gear design eliminates the need for wearable parts, resulting in maintenance free traction. Recongnized not only for its durability but also

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IWE Rear Ends Only
IWE Rear Ends Only
Part NamePart CategoryConditionPrice
USA Standard GM 12 Bolt Truck Ring and Pinion 3.08:1 RatioRing and PinionsNew$275.00
This USA Standard gear is for a GM 12 Bolt Truck rear differential 3.08:1 ratio. USA Standard gear offers a lower cost alternative to other manufacturers when price must be kept low. Some slight noise may be detected under light load. This is considered normal, and is no way detrimental

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IWE Rear Ends Only
IWE Rear Ends Only
Part NamePart CategoryConditionPrice
USA Standard GM 12 Bolt Truck Ring and Pinion 3.42:1 RatioRing and PinionsNew$250.00
This USA Standard gear is for a GM 12 Bolt Truck rear differential 3.42:1 ratio. USA Standard gear offers a lower cost alternative to other manufacturers when price must be kept low. Some slight noise may be detected under light load. This is considered normal, and is no way detrimental

Read More ...
IWE Rear Ends Only
IWE Rear Ends Only
Part NamePart CategoryConditionPrice
USA Standard GM 12 Bolt Truck Ring and Pinion 3.73:1 RatioRing and PinionsNew$250.00
This USA Standard gear is for a GM 12 Bolt Truck rear differential 3.73:1 ratio. USA Standard gear offers a lower cost alternative to other manufacturers when price must be kept low. Some slight noise may be detected under light load. This is considered normal, and is no way detrimental

Read More ...
IWE Rear Ends Only
IWE Rear Ends Only
Part NamePart CategoryConditionPrice
USA Standard GM 12 Bolt Truck Ring and Pinion 3.73:1 Ratio THICKRing and PinionsNew$250.00
This USA Standard gear is for a GM 12 Bolt Truck rear differential 3.73:1 ratio THICK GEAR for a 3.42-down carrier. USA Standard gear offers a lower cost alternative to other manufacturers when price must be kept low. Some slight noise may be detected under light load. This is considered

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IWE Rear Ends Only
IWE Rear Ends Only
Part NamePart CategoryConditionPrice
USA Standard GM 12 Bolt Truck Ring and Pinion 4.11:1 Ratio Ring and PinionsNew$250.00
This USA Standard gear is for a GM 12 Bolt Truck rear differential 4.11:1 ratio. USA Standard gear offers a lower cost alternative to other manufacturers when price must be kept low. Some slight noise may be detected under light load. This is considered normal, and is no way detrimental

Read More ...
IWE Rear Ends Only
IWE Rear Ends Only
Part NamePart CategoryConditionPrice
USA Standard GM 12 Bolt Truck Ring and Pinion 4.11:1 Ratio THICKRing and PinionsNew$250.00
This USA Standard gear is for a GM 12 Bolt Truck rear differential 4.11:1 ratio THICK GEAR this will fit on a 342-down carrier. USA Standard gear offers a lower cost alternative to other manufacturers when price must be kept low. Some slight noise may be detected under light load.

Read More ...
IWE Rear Ends Only
IWE Rear Ends Only
Part NamePart CategoryConditionPrice
USA Standard GM 12 Bolt Truck Ring and Pinion 4.56:1 RatioRing and PinionsNew$250.00
This USA Standard gear is for a GM 12 Bolt Truck rear differential 4.56:1 ratio. USA Standard gear offers a lower cost alternative to other manufacturers when price must be kept low. Some slight noise may be detected under light load. This is considered normal, and is no way detrimental

Read More ...
IWE Rear Ends Only
IWE Rear Ends Only
Part NamePart CategoryConditionPrice
USA Standard GM 12 Bolt Truck Ring and Pinion 4.56:1 Ratio THICKRing and PinionsNew$250.00
This USA Standard gear is for a GM 12 Bolt Truck rear differential 4.56:1 ratio THICK GEAR this will work on a 342-down carrier. USA Standard gear offers a lower cost alternative to other manufacturers when price must be kept low. Some slight noise may be detected under light load.

Read More ...
IWE Rear Ends Only
IWE Rear Ends Only
Part NamePart CategoryConditionPrice
USA Standard GM 12 Bolt Truck Ring and Pinion 4.88:1 RatioRing and PinionsNew$265.00
This USA Standard gear is for a GM 12 Bolt Truck rear differential 4.88:1 ratio. USA Standard gear offers a lower cost alternative to other manufacturers when price must be kept low. Some slight noise may be detected under light load. This is considered normal, and is no way detrimental

Read More ...
IWE Rear Ends Only
IWE Rear Ends Only