1981 CHEVROLET K20 Differential & Rear-End Components

Gear, Ring and Pinion, 4.56:1 Ratio, GM, 8.5/8.6 in., 10-Bolt, Set

Part Number: MGR-GM10-456

4.5 out of 5 stars ( 4 )

Estimated Ship Date: Monday 2/23/2026 if shipped by air

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Gear, Ring and Pinion, 4.56:1 Ratio, GM, 12-Bolt, Truck, Set

Part Number: MGR-GM12-456

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 2/23/2026 if shipped by air

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Ring and Pinion Gear, 4.11:1 Ratio, GM, 8.5 in./8.6 in., Rear, Set

Part Number: SPZ-36216

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Estimated Ship Date: Monday 2/23/2026 if shipped by air

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Ring and Pinion Installation Kit, Master Kit, GM, 8.875 in., 30-Spline Pinion, Truck, Kit

Part Number: MGR-R12RMKT

4.5 out of 5 stars ( 10 )

Estimated Ship Date: Monday 2/23/2026 if shipped by air

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Axle Shaft, Front, Dana 44, Each

Part Number: SDH-41677

5.0 out of 5 stars ( 3 )

Estimated Ship Date: Monday 2/23/2026 if shipped by air

Gear, Ring and Pinion, 4.88:1 Ratio, GM, 8.5/8.6 in., 10-Bolt, 3 Series, Set

Part Number: RMG-6901691

4.6 out of 5 stars ( 5 )

Estimated Ship Date: Monday 2/23/2026 if shipped by air

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Spool, Mini, Steel, 30-spline, 10-bolt, GM 8.5 in., Each

Part Number: YGA-32233

4.67 out of 5 stars ( 12 )

Estimated Ship Date: Monday 2/23/2026 if shipped by air

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Gear, Ring and Pinion, 4.30:1 Ratio, GM, 8.5/8.6 in., 10-Bolt, Set

Part Number: MGR-GM10-430

1.0 out of 5 stars ( 1 )

Estimated Ship Date: Mar 13, 2026 if ordered today

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Axles, Replacement, Driver Side, Passenger Side, Rear, Chevy, GMC, 8.5 in., Pair

Part Number: MSR-A30-88GMTK

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Estimated Ship Date: Monday 2/23/2026 if shipped by air

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

Part Number: MGR-R10REMK

4.0 out of 5 stars ( 2 )

Estimated Ship Date: Monday 2/23/2026 if shipped by air

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Gear, Ring and Pinion, 3.73:1 Ratio, GM, 9.5 in., 14-Bolt, Truck, Set

Part Number: MGR-GM9-5-373

4.25 out of 5 stars ( 4 )

Estimated Ship Date: Monday 2/23/2026 if shipped by air

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Gear, Ring and Pinion, 4.11:1 Ratio, GM, 12-Bolt Truck, 3 Series, Set

Part Number: RMG-6903501

Not Yet Reviewed

Estimated Ship Date: Monday 2/23/2026 if shipped by air

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Differential Shims, Carrier, Steel, Kit

Part Number: MGR-SS10

4.89 out of 5 stars ( 9 )

Estimated Ship Date: Monday 2/23/2026 if shipped by air

Differential, Eaton Detroit Locker, 28-Spline, GM, 8.5 in., 3-Series, Each

Part Number: ETN-187C149A

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Estimated Ship Date: Mar 18, 2026 if ordered today

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Gear, Ring and Pinion, 3.42:1 Ratio, GM, 8.875 in. Truck, Set

Part Number: MGR-GM12-342

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Estimated Ship Date: Monday 2/23/2026 if shipped by air

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Gear, Ring and Pinion, EXCel, 4.10:1 Ratio, GM, 8.875 in., 12-Bolt Truck, Set

Part Number: RMG-12BT410T

4.5 out of 5 stars ( 2 )

Estimated Ship Date: Monday 2/23/2026 if shipped by air

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Ring and Pinion Gears, 5.38:1 Ratio, 30-spline, Standard Ring Gear Rotation, GM 10.5 in. (14-bolt), Set

Part Number: YGA-24140

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Estimated Ship Date: Monday 2/23/2026 if shipped by air

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Ring and Pinion Gears, EXCel, 3.73:1 Ratio, 30-spline, Standard Rotation, GM 10.5 in., Chevy, GMC, Rear, Set

Part Number: RMG-GM105373

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Estimated Ship Date: Mar 13, 2026 if ordered today

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Ring and Pinion Gears, 3.23:1 Ratio, GM 8.5 in., Set

Part Number: SVL-2023698

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Estimated Ship Date: Monday 2/23/2026 if shipped by air

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Pinion Bearing, 1.437 in. i.d., BMW, Buick, Cadillac, Chevy, GMC, Chrysler, Dodge, Mercedes-Benz, Volvo, Each

Part Number: TMK-HM89449

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 2/23/2026 if shipped by air

Ring and Pinion Kit

Part Number: RMG-GM105410

Not Yet Reviewed

Estimated Ship Date: Mar 13, 2026 if ordered today

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Differential Ring and Pinion; GM 8.5 10 Bolt - 3.73 Ratio

Part Number: SVL-2023695

2.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 2/23/2026 if shipped by air

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Locking Hubs, Manual, 19-spline, 6 Bolts, Chrome Steel Housing, Dana 44, Chevy, Dodge, Ford, GMC, Jeep, Set

Part Number: CWA-400518

Not Yet Reviewed

Estimated Ship Date: Monday 2/23/2026 if shipped by air

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Differential, No-Slip Traction System, 30-Spline, GM 10.5 in., Each

Part Number: PWT-92-0705-3000

4.67 out of 5 stars ( 3 )

Estimated Ship Date: Monday 2/23/2026 if shipped by air

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Axles, Replacement, Driver Side, Passenger Side, Rear, Chevy, GMC, 8.875 in., Pair

Part Number: MSR-A30-70GMT4

4.25 out of 5 stars ( 4 )

Estimated Ship Date: Monday 2/23/2026 if shipped by air

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