OLDSMOBILE Richmond Gear Differential & Rear-End Components

Spool, Mini, Steel, 26-Spline, 10-Bolt, GM 7.5 in., Each

Part Number: RMG-78-7526-1

4.4 out of 5 stars ( 10 )

Estimated Ship Date: Monday 9/29/2025

Spool, Mini, Steel, 28-Spline, 10-Bolt, GM 8.5 in., Each

Part Number: RMG-78-1028-1

4.33 out of 5 stars ( 6 )

Estimated Ship Date: Monday 9/29/2025

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Ring and Pinion Installation Kit, GM, 12-Bolt, 8.875 in. Diameter Ring Gear, 30-Spline Pinion, Kit

Part Number: RMG-831019B

1.5 out of 5 stars ( 2 )

Estimated Ship Date: Monday 9/29/2025

Differential Side Bearing Spacer; Solid Differential Spacer; Fits GM 12 Bolt Car

Part Number: RMG-04-0012-1

Not Yet Reviewed

Estimated Ship Date: Oct 15, 2025 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

Not Yet Reviewed

Estimated Ship Date: Oct 15, 2025 if ordered today

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Carrier Bearings, GM 12 Bolt

Part Number: RMG-29-0005-1

Not Yet Reviewed

Estimated Ship Date: Oct 15, 2025 if ordered today

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Ring and Pinion Installation Kit, Half Kit, GM 7.5 in., GM 7.625 in., Kit

Part Number: RMG-83-1083-B

Not Yet Reviewed

Estimated Ship Date: Oct 17, 2025 if ordered today

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Differential Spool Bearing Kit; Fits GM 8.5 in. 10 Bolt; Incl. Bearings/Bearing Races

Part Number: RMG-29-0013-1

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Oct 15, 2025 if ordered today

• Drop Ship
• Special Order

Ring and Pinion Installation Kit, GM, 8.5 in. O, Kit

Part Number: RMG-83-1088-C

Not Yet Reviewed

Estimated Ship Date: Monday 9/29/2025