BUICK ROADMASTER Differential & Rear-End Components

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

Part Number: RMG-81-1028-1

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Mar 17, 2026 if ordered today

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

Part Number: MGR-R10RSK

3.0 out of 5 stars ( 1 )

Estimated Ship Date: Mar 17, 2026 if ordered today

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Mini Spool, MINI SPOOL GM 10 BOLT 8.5"

Part Number: RMG-XL-5140

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Estimated Ship Date: Mar 17, 2026 if ordered today

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Axle Shaft, Rear, Direct Replacement, GM 8.5/8.6 in., Buick, Chevy, Each

Part Number: RNB-630-117

5.0 out of 5 stars ( 3 )

Estimated Ship Date: Mar 16, 2026 if ordered today

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Gear, Ring and Pinion, 3.42:1 Ratio, GM 7.5/7.625 in., Set

Part Number: RNB-697-302

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Estimated Ship Date: Mar 16, 2026 if ordered today

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R-P Mstr Brng Kit

Part Number: RNB-797-102

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Estimated Ship Date: Mar 16, 2026 if ordered today

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Ring and Pinion Gear Installation Kit, 10-Bolt, 30 Pinion Spline Count, Gear Rotation Standard, Chevy, GMC, Buick, Pontiac, Oldsmobile, Cadillac, Kit

Part Number: ALY-352021

4.0 out of 5 stars ( 1 )

Estimated Ship Date: Mar 17, 2026 if ordered today

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Ring and Pinion Installation Kit, Basic, GM 8.5 in., Front/Rear, Kit

Part Number: MGR-R10RET

2.0 out of 5 stars ( 1 )

Estimated Ship Date: Mar 16, 2026 if ordered today

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COUPLER

Part Number: PWT-1921504CAK

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Estimated Ship Date: Apr 14, 2026 if ordered today

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COUPLER

Part Number: PWT-1931504CAU

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Estimated Ship Date: Apr 14, 2026 if ordered today

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SLOTTED DRIVER

Part Number: PWT-424003DGE2

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Estimated Ship Date: Apr 14, 2026 if ordered today

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Differential Carrier Gear Kit

Part Number: RMG-XL-4050

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Estimated Ship Date: Mar 16, 2026 if ordered today

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Differential Carrier

Part Number: RMG-XL-5036

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Estimated Ship Date: Mar 16, 2026 if ordered today

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Mini Spool, MINI SPOOL GM 7.5" 26 SPL

Part Number: RMG-XL-5130

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Estimated Ship Date: Mar 16, 2026 if ordered today

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Axle Shaft, Light-Duty, Rear, C-clip, 30-spline Inner, 30.375 in. Length, GM 8.5 in., Buick, Cadillac, Chevy

Part Number: MGR-26018080

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Estimated Ship Date: Mar 16, 2026 if ordered today

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