CHEVROLET Chevy big block Mark IV Differential & Rear-End Components

Differential Carrier Rebuild Kits and Spider Gears, Spider Gear Sets, GM 8.875 in. (12-bolt), Car/Truck, 30-spline, Buick, Chevy, GMC, Pontiac, Kit

Part Number: SPZ-39021

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Differential Carrier Rebuild Kits and Spider Gears, GM 8.5 in., Side Gears, 28-spline, 10-bolt, Buick, Chevrolet, GMC, Oldsmobile, Pontiac, Kit

Part Number: SPZ-39026

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Ring and Pinion Kit

Part Number: RMG-GM75308

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Estimated Ship Date: Dec 29, 2025 if ordered today

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Axle Shaft, Dana 44, 30 Inner Spline, 36.130 in. Length, Front Driver Side, GM, Each

Part Number: SDH-27902-2X

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Axle Shaft, 30-Spline, 6 x 5.50 in. Bolt Circle, 30.75 in. Length, Chevy, GMC, Rear, Each

Part Number: YGA-21284

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Axle Shaft, OEM Replacement, 30-Spline, 31.813 in. Length, Chevy, GMC, 8.6 in., Rear, Each

Part Number: RMG-92-25130

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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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Differential Carrier, Open, Dana 44, 30-Spline, 3.92 and numerically higher ratio, Each

Part Number: SDH-706025X

3.4 out of 5 stars ( 5 )

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Axle Shaft, Front Right Inner, Dana 44, 18.500 in. Length, 30 Spline, Steel, Chevy, GMC, Each

Part Number: SDH-27902-1X

3.0 out of 5 stars ( 2 )

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Differential Cover, 12-bolt, Aluminum, Polished, GM 8.875 in. Truck, Chevy, GMC, Each

Part Number: YGA-32027

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Estimated Ship Date: Jan 9, 2026 if ordered today

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Gear, Ring and Pinion, EXCel, 3.08:1 Ratio, GM, 8.875 in., 12-Bolt Truck, Set

Part Number: RMG-12BT308

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Differential Parts Kit, Open Differential, Includes 30-spline Side and Pinion Gears/Washers/Pinion Shaft/Bolt

Part Number: MGR-GM-10BI-30

4.9 out of 5 stars ( 10 )

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Ring and Pinion Gears, 3.42:1 Ratio, 30-spline, Standard Ring Gear Rotation, GM 8.5/8.6 in., Set

Part Number: SPZ-36213

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Estimated Ship Date: Dec 29, 2025 if ordered today

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Ring and Pinion Gears, GM 8.5/8.6 in., 4.88:1 Ratio, 30-spline, Standard, Must Use 2.73:1 or Numerically Higher Ratio Carrier, GM 8.5/8.6 in., Set

Part Number: SVL-2023704

5.0 out of 5 stars ( 1 )

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Axle Shaft, Rear, C-Clip, 1541H Alloy, 28 Spline, 31.375 in. Length, GM 8.2/8.5 in., Chevy, Each

Part Number: YGA-21248

3.0 out of 5 stars ( 4 )

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Gear, Ring and Pinion, 4.56:1 Ratio, GM, 9.5 in., 14-Bolt, Truck, Set

Part Number: MGR-GM9-5-456

4.5 out of 5 stars ( 2 )

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Axle Shaft, OEM Replacement, 28-Spline, 30.125 in. Length, Chevy, GMC, Pontiac, 8.2 in., Rear, Each

Part Number: RMG-92-25114

4.86 out of 5 stars ( 7 )

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Ring and Pinion-GM 8.875

Part Number: MGR-GM12-373A

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Estimated Ship Date: Dec 29, 2025 if ordered today

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Axle, Direct Fit, OEM Replacement, Rear, 1541H Steel, 28-Spline, Chevy, 8.2 in., Each

Part Number: ALY-17121

5.0 out of 5 stars ( 1 )

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Differential Carrier Rebuild Kit, Open Differential, 30 Spline Axles, Dana 44, Kit

Part Number: MGR-706027XR

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Gear, Ring and Pinion, EXCel, 4.10:1 Ratio, GM, 7.5/7.625 in., 10-Bolt, Set

Part Number: RMG-GM75410OE

1.0 out of 5 stars ( 1 )

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Spider Gear Kit, Open Differential, GM 8.875 in., 30 Spline, Kit

Part Number: YGA-16043

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Axle Shaft, OEM Replacement, C-clip, 1541H Alloy Steel, 28-spline Inner, 30.125 in. Length, Each

Part Number: MGR-MG1015

2.5 out of 5 stars ( 2 )

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Axle Shaft, 28-Spline, 31.313 in. Length, Rear, Chevy, GMC, Each

Part Number: SPZ-35172

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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: Today

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