1979 PONTIAC FIREBIRD Differential & Rear-End Components

Crush Sleeve, Steel, GM 8.25 in. IFS, GM 8.5 in., Each

Part Number: MGR-1234726

5.0 out of 5 stars ( 3 )

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Carrier Shims, Super, Steel, Kit

Part Number: YGA-55001

4.87 out of 5 stars ( 15 )

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

Part Number: MGR-R10RPK

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Differential Clutch, Steel Pack, Rear, Posi, GM, 8.875 in., Set

Part Number: YGA-16041

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Estimated Ship Date: Oct 8, 2025 if ordered today

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Ring and Pinion Gears, 3.90:1 Ratio, 30-spline, Standard Ring Gear Rotation, GM 8.5 in., GM 8.6 in., Set

Part Number: YGA-24159

5.0 out of 5 stars ( 3 )

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Ring and Pinion Gears, 3.42:1 Ratio, 27-spline, Standard Ring Gear Rotation, GM 7.5 in., GM 7.625 in., Set

Part Number: SPZ-36195

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Estimated Ship Date: Sep 23, 2025 if ordered today

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Gear, Ring and Pinion, 3.90:1 Ratio, GM, 7.5 in./7.625 in., Standard Rotation, Set

Part Number: MGR-G875390

4.0 out of 5 stars ( 3 )

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Ring and Pinion Installation Kit, GM, 7.5 in./7.625 in., 10-Bolt, 1977-1981, 27-Spline Pinion, Kit

Part Number: RMG-8310161

2.0 out of 5 stars ( 1 )

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Differential Shims, Carrier, Steel, GM, 8.5 in., 8.625 in., Kit

Part Number: MGR-GM10MSK

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Performance Mini Spool (GM 8.5 - 30 Spline)

Part Number: SDH-10015388

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

Part Number: SPZ-36218

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Pinion Nut, Steel, Each

Part Number: YGA-33152

5.0 out of 5 stars ( 2 )

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Differential Shims, Pinion Shim Type, Steel, Set

Part Number: MGR-1100

3.86 out of 5 stars ( 7 )

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Gear, Ring and Pinion, 3.90:1 Ratio, GM, 8.5/8.6 in., 10-Bolt, Set

Part Number: MGR-GM10-390

3.0 out of 5 stars ( 2 )

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Axle C-Clip, Steel, Natural, GM 7.5 in., GM 7.6 in., GM 8.0 in., Each

Part Number: YGA-33082

5.0 out of 5 stars ( 6 )

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Gear, Ring and Pinion, 3.08:1 Ratio, GM, 8.5/8.6 in., 10-Bolt, 3 Series, Set

Part Number: RMG-4900171

4.67 out of 5 stars ( 3 )

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Differential Cover Bolt, Hex-flange Head, Steel, Black, GM, 8mm x 1.25 in., Each

Part Number: YGA-33572

5.0 out of 5 stars ( 1 )

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Differential Cover, Aluminum Girdle Cover, Natural, 10-bolt, GM 7.5 in., GM 7.625 in., Each

Part Number: YGA-32118

5.0 out of 5 stars ( 1 )

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Ring and Pinion Installation Kit, Master, GM 7.5 in., Rear, Kit

Part Number: MGR-R7-5GRBMK

1.0 out of 5 stars ( 1 )

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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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Ring and Pinion

Part Number: MGR-GM75-323

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Differential Cover, 10-bolt, Steel, Chrome, GM 7.5 in., GM 7.625 in., Each

Part Number: YGA-32014

5.0 out of 5 stars ( 1 )

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Gear, Ring and Pinion, 3.08:1 Ratio, GM, 8.5 in/8.6 in., Set

Part Number: MGR-GM10-308

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Gear, Ring and Pinion, 4.11:1 Ratio, GM, 8.5/8.6 in., 10-Bolt, Set

Part Number: MGR-GM10-411

5.0 out of 5 stars ( 9 )

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Differential Carrier Bearings, Standard Replacement, Includes Cup, 1.625 in. Bore, AMC, GM, Mopar, Jeep, International, Studebaker, Hummer, Each

Part Number: TMK-SET69

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Today