1980 PONTIAC FIREBIRD Differential & Rear-End Components

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

Part Number: MGR-FS10-28

4.67 out of 5 stars ( 3 )

Estimated Ship Date: Today

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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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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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Ring Gear Bolt, Hex Head, 7/16-20 in. Thread Size, Steel, Black, Each

Part Number: YGA-33049

5.0 out of 5 stars ( 2 )

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Carrier Shims, Super, Steel, Kit

Part Number: YGA-55001

4.87 out of 5 stars ( 15 )

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Differential Cover, 10-bolt, Aluminum, Natural, GM 8.2 in., GM 8.5 in., GM 8.6 in., Each

Part Number: BMM-70502

4.76 out of 5 stars ( 33 )

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Gear, Ring and Pinion, 3.73:1 Ratio, GM, 8.5/8.6 in., Set

Part Number: MGR-G885373

4.8 out of 5 stars ( 5 )

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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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Gear, Ring and Pinion, 3.42:1 Ratio, GM, 7.5 in./7.625 in., 10-Bolt, 3 Series, Set

Part Number: RMG-4900451

4.0 out of 5 stars ( 5 )

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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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Axle, C-Clip, Rear, 1541H Alloy Steel, 28-spline, Chevy, Pontiac, 8.5 in., Each

Part Number: MSR-A102803-1

5.0 out of 5 stars ( 4 )

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Gear, Ring and Pinion, 3.90:1 Ratio, GM, 8.5/8.6 in., 10-Bolt, 3 Series, Set

Part Number: RMG-4900341

4.67 out of 5 stars ( 9 )

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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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Axle Shaft, Rear, C-clip Type, 28-spline Inner, Steel, 30.000 in. Length, GM 8.5 in., Chevy, Pontiac, Each

Part Number: RNB-630-141

1.0 out of 5 stars ( 1 )

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Performance Mini Spool (GM 8.5 - 30 Spline)

Part Number: SDH-10015388

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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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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, EXCel, 4.56:1 Ratio, GM, 7.5/7.625 in., 10-Bolt, Set

Part Number: RMG-GM75456

5.0 out of 5 stars ( 2 )

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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, Grip Pro Traction System, 28-Spline, GM 8.5 in., Each

Part Number: PWT-GT201028

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Estimated Ship Date: Dec 15, 2025 if ordered today

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• Mfr. Rebate

$40.00 Mail-In Rebate

Price after Manufacturer Rebate: $682.66

Rebate Expires: 12/31/2025

Get $40 back after rebate on this Powertrax Product! Go to https://www.richmondgear.com/rebate.pdf for details. ...Read More

Get UP TO $55 back after rebate on select Powertrax Products! Go to https://www.richmondgear.com/rebate.pdf for details. Valid on purchases made between 11/1/25 and 12/31/25. Claims must be submitted within 30 days of purchase. Allow 6-8 weeks for processing. Valid in USA and Canada. Limit two qualifying purchases per household or address. This offer cannot be combined with other discounts or offers. Rebate intended for end consumer only. Show Less

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Differential Shims, Pinion Shim Type, Steel, Set

Part Number: MGR-1100

3.86 out of 5 stars ( 7 )

Estimated Ship Date: Today

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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Ring and Pinion Installation Kit, GM, 10-Bolt, 8.5 in. Diameter Ring Gear, 30-Spline Pinion, Kit

Part Number: RMG-831021B

2.67 out of 5 stars ( 3 )

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Pinion Nut, Steel, Each

Part Number: YGA-33152

5.0 out of 5 stars ( 2 )

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Ring and Pinion Gears and Installation Kit, 8.5" GM 3.42 REAR R&P GEAR/ INSTALL KIT PACKAGE with AK 1563 AXLE BRGS (2.25" OD)

Part Number: YGA-12621

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Estimated Ship Date: Dec 26, 2025 if ordered today

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