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GM 8.5 REAR

71-up Impala, Caprice & mixed fullsized

70-81 Camaro (mixed apps w/12 bolts into 72)

70-77 Monte Carlo

70-79 Nova

72-up Roadmaster Wagon

73-77 Apollo

73-77 Century

84-87 Grand National

73-77 Regal

73-78 Electra

73-84 Gran Sport

73-84 Le Sabre

71-74 Roadmaster

71-89 Misc fullsized rear drive

85-88 Hurst Olds

73-79 Omega

70-81 Firebird TA

71-77 Grand Prix

71-77 LeMans

71-77 Ventura

77-00 C10, C1500 Pickups (five lug, mixed apps with 12 bolt, 77-81 depends on GVW)

77-98 G1500 Van (5 lug)

81-98 K10, K1500 pickups

81-00 Suburban 1500 (five lug)

81-00 K5 Blazer & Jimmy

92-00 Tahoe/Envoy

92/94 GMC Typhoon

91-92 GMC Syclone

94-98 Blazer S10 ZR2 (30 spline)

Cover Bolts: 10

Ring gear diameter: 8.5”

Carrier breaks: 2.56-down or 2.73-up

Pinion shaft diameter/splines: 1.625/30

Axle shaft diameter/splines: 1.20/28 (77-87) or 1.28/30 (88-up)

Available ratios: 2.73, 2.76, 2.93, 3.08, 3.23, 3.42, 3.73, 3.90, 4.11, 4.56, 4.88, 5.13, 5.38, 5.57


 
Part NamePart CategoryConditionPriceShipping
GM 8.5 Rear Bearing KitBearing KitsNew$165.00$16.99
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 CategoryConditionPriceShipping
GM 8.5 HD Bearing Kit * Eaton Posi *Bearing KitsNew$165.00$15.99
GM 8.5HD bearing kit, you must use the HD bearing kit if you have an Eaton Posi-trac. 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

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IWE Rear Ends Only
IWE Rear Ends Only
Part NamePart CategoryConditionPriceShipping
ARB Air Locker GM 8.5 Rear 30 Spline 2.73-up RatiosARB Air Lockers And CompressorsNew$1050.00$35.99
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 CategoryConditionPriceShipping
Eaton Posi-Trac GM 8.5 Rear 28 Spline 72-89Posi-tracs / Limited SlipsNew$695.00$29.99
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 8.5 rear differential

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IWE Rear Ends Only
IWE Rear Ends Only
Part NamePart CategoryConditionPriceShipping
Eaton Posi-Trac GM 8.5 Rear 30 Spline Posi-tracs / Limited SlipsNew$595.00$29.99
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 8.5 rear differential

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IWE Rear Ends Only
IWE Rear Ends Only
Part NamePart CategoryConditionPriceShipping
Eaton ELocker GM 8.5 Rear 30 SplineElectric LockersNew$950.00$35.99
The Elockers electromagnetic locking mechanism is the next generation of aftermarket differential technology. Performs as an open differential until you decide that you need more traction. Eaton Elocker is your push buttom solution to almost any traction problem. when locked the Elocker performs as a full locker,

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IWE Rear Ends Only
IWE Rear Ends Only
Part NamePart CategoryConditionPriceShipping
Yukon Duragrip GM 8.5 Rear 28 Spline 3.23-up RatiosPosi-tracs / Limited SlipsNew$595.00$35.99
Yukon Duragrip positraction for a GM 8.5 rear with 28 spline axles will fit 3.23-up ratios. THE YUKON DURAGRIP USES A NODULAR IRON CASE AND FORGED 4130 INTERNALS FOR ADDED STRENGTH ALONG WITH COMPOSITE CLUTCHES FOR HIGH PERFORMANCE AND LONG LIFE. ALL UNITS ARE REBUILDABLE AND MANY OFFER UPGRADES TO

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IWE Rear Ends Only
IWE Rear Ends Only
Part NamePart CategoryConditionPriceShipping
Yukon Duragrip GM 8.5 Rear 30 Spline 3.23-up RatiosPosi-tracs / Limited SlipsNew$595.00$35.99
Yukon Duragrip positraction for a GM 8.5 rear with 30 spline axles will fit 3.23-up ratios. THE YUKON DURAGRIP USES A NODULAR IRON CASE AND FORGED 4130 INTERNALS FOR ADDED STRENGTH ALONG WITH COMPOSITE CLUTCHES FOR HIGH PERFORMANCE AND LONG LIFE. ALL UNITS ARE REBUILDABLE AND MANY OFFER UPGRADES TO

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IWE Rear Ends Only
IWE Rear Ends Only
Part NamePart CategoryConditionPriceShipping
Detroit Locker GM 8.5 Rear 30 Spline LockersNew$950.00$35.99
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 CategoryConditionPriceShipping
Detroit Locker GM 8.5 Rear 28 Spline LockersNew$950.00$35.99
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 CategoryConditionPriceShipping
Detroit Truetrac GM 8.5 Rear 28 spline Posi-tracs / Limited SlipsNew$625.00$35.99
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 CategoryConditionPriceShipping
Detroit Truetrac GM 8.5 30 SplinePosi-tracs / Limited SlipsNew$650.00$29.99
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 CategoryConditionPriceShipping
USA Standard GM 8.5 Ring and Pinion 3.08:1Ring and PinionsNew$250.00$23.99
This USA Standard gear is a GM 8.5 rear differential 3.08:1 ratio. This ring and pinion will also fit a GM 8.6 rear diff and a GM 10 bolt corp 8.5 front diff. USA Standard gear offers a lower cost alternative to other manufacturers when price must be kept low.

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IWE Rear Ends Only
IWE Rear Ends Only
Part NamePart CategoryConditionPriceShipping
USA Standard GM 8.5 Ring and Pinion 3.42:1Ring and PinionsNew$250.00$23.99
This USA Standard gear is a GM 8.5 rear differential 3.42:1 ratio. This ring and pinion will also fit a GM 8.6 rear diff and a GM 10 bolt corp 8.5 front diff. USA Standard gear offers a lower cost alternative to other manufacturers when price must be kept low.

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IWE Rear Ends Only
IWE Rear Ends Only
Part NamePart CategoryConditionPriceShipping
USA Standard GM 8.5 Ring and Pinion 3.73:1Ring and PinionsNew$250.00$23.99
This USA Standard gear is a GM 8.5 rear differential 3.73:1 ratio. This ring and pinion will also fit a GM 8.6 rear diff and a GM 10 bolt corp 8.5 front diff. USA Standard gear offers a lower cost alternative to other manufacturers when price must be kept low.

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IWE Rear Ends Only
IWE Rear Ends Only
Part NamePart CategoryConditionPriceShipping
USA Standard GM 8.5 Ring and Pinion 4.11:1Ring and PinionsNew$250.00$23.99
This USA Standard gear is a GM 8.5 rear differential 4.11:1 ratio. This ring and pinion will also fit a GM 8.6 rear diff and a GM 10 bolt corp 8.5 front diff. USA Standard gear offers a lower cost alternative to other manufacturers when price must be kept low.

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IWE Rear Ends Only
IWE Rear Ends Only
Part NamePart CategoryConditionPriceShipping
USA Standard GM 8.5 Ring and Pinion 4.56:1Ring and PinionsNew$250.00$23.99
This USA Standard gear is a GM 8.5 rear differential 4.56:1 ratio. This ring and pinion will also fit a GM 8.6 rear diff and a GM 10 bolt corp 8.5 front diff. USA Standard gear offers a lower cost alternative to other manufacturers when price must be kept low.

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IWE Rear Ends Only
IWE Rear Ends Only
Part NamePart CategoryConditionPriceShipping
USA Standard GM 8.5 Ring and Pinion 4.88:1Ring and PinionsNew$275.00$23.99
This USA Standard gear is a GM 8.5 rear differential 4.88:1 ratio. This ring and pinion will also fit a GM 8.6 rear diff and a GM 10 bolt corp 8.5 front diff. USA Standard gear offers a lower cost alternative to other manufacturers when price must be kept low.

Read More ...
IWE Rear Ends Only
IWE Rear Ends Only
Part NamePart CategoryConditionPriceShipping
USA Standard GM 8.5 Ring and Pinion 5.13:1Ring and PinionsNew$275.00$23.99
This USA Standard gear is a GM 8.5 rear differential 5.13:1 ratio. This ring and pinion will also fit a GM 8.6 rear diff and a GM 10 bolt corp 8.5 front diff. USA Standard gear offers a lower cost alternative to other manufacturers when price must be kept low.

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IWE Rear Ends Only
IWE Rear Ends Only