BUICK GRAN SPORT Differential & Rear-End Components

Ring and Pinion Installation Kit, GM 8.875 in., "C" Axle, 12-Bolt, 30-Spline Pinion, Kit

Part Number: RMG-8310191

4.05 out of 5 stars ( 20 )

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Ring and Pinion Installation Kit, 12-bolt, 30-spline, Rear, GM 8.875 in. Passenger Car, Kit

Part Number: MGR-R12CRMKT

3.67 out of 5 stars ( 12 )

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Ring and Pinion Installation Kit, Rear, GM 8.875 in., 12-Bolt, GM, Passenger Car, Kit

Part Number: ETN-K-GM12CR

4.0 out of 5 stars ( 3 )

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Ring and Pinion Installation Kit, GM, 8.875 in., Passenger Car, 12-Bolt, Kit

Part Number: RMG-831019M

4.0 out of 5 stars ( 12 )

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Ring and Pinion Installation Kit, Master Kit, GM 8.2 in. BOP, Kit

Part Number: MGR-R85PRMKT

3.6 out of 5 stars ( 5 )

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Ring and Pinion Installation Kit, Super Kit, GM, 8.875 in., Kit

Part Number: MGR-R12CRSK

3.5 out of 5 stars ( 2 )

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Differential Parts Kit; Open Differential Internal Kit; Incl. Side And Pinion Gears/Washers/Pinion Shaft And L

Part Number: MGR-GM12BI

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Ring and Pinion Installation Kit, Master Kit, Buick, 8.2 in., Kit

Part Number: MGR-R8-5PRMK

3.67 out of 5 stars ( 3 )

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Ring and Pinion Installation Kit, 12-bolt, 30-spline, Rear, GM 8.875 in. Passenger Car, Kit

Part Number: MGR-R12CRMK

3.33 out of 5 stars ( 3 )

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Ring and Pinion Installation Kit, Super Kit, GM, 8.875 in., Kit

Part Number: MGR-R12CRSKT

4.5 out of 5 stars ( 14 )

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Ring and Pinion Installation Kit, GM, 8.2 in., Buick or Pontiac Axle, 10-Bolt, 27-Spline Pinion, Kit

Part Number: RMG-8310401

3.67 out of 5 stars ( 3 )

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Differential Carrier Gear Kit

Part Number: RMG-XL-4058

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Estimated Ship Date: Feb 9, 2026 if ordered today

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Spool, Mini, Steel, 30-Spline, 12-Bolt, GM 8.875 in., Each

Part Number: RMG-78-1230-1

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Estimated Ship Date: Feb 9, 2026 if ordered today

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Ring and Pinion Kit

Part Number: RMG-XL-1019-1

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Estimated Ship Date: Feb 9, 2026 if ordered today

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Gear, Ring and Pinion, EXCel, 3.42:1 Ratio, GM, 8.875 in., 12-Bolt Car, Set

Part Number: RMG-12BC342

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Feb 9, 2026 if ordered today

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Ring and Pinion Installation Kit, Basic, GM 8.875 in. 12-Bolt, Rear, Kit

Part Number: MGR-R12CRT

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Estimated Ship Date: Feb 9, 2026 if ordered today

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Ring and Pinion Kit

Part Number: RMG-XL-1040-1

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Estimated Ship Date: Feb 9, 2026 if ordered today

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SPACER

Part Number: PWT-6241066SEG

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Estimated Ship Date: Mar 9, 2026 if ordered today

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Mini Spool, MINI SPOOL GM 12 BOLT CAR

Part Number: RMG-XL-5145

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Estimated Ship Date: Feb 9, 2026 if ordered today

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COUPLER

Part Number: PWT-5201001CJR

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Estimated Ship Date: Mar 9, 2026 if ordered today

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COUPLER ASSEMBLY

Part Number: PWT-5201133CIS

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Estimated Ship Date: Mar 9, 2026 if ordered today

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Gear, Ring and Pinion, 3.55:1 Ratio, GM 8.25 in., Set

Part Number: RNB-697-802

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Estimated Ship Date: Feb 9, 2026 if ordered today

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Gear, Ring and Pinion, 3.73:1 Ratio, GM 8.25 in., Set

Part Number: RNB-697-803

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Estimated Ship Date: Feb 9, 2026 if ordered today

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