1978 PONTIAC FIREBIRD Differential & Rear-End Components

Gear, Ring and Pinion, EXCel, 3.73:1 Ratio, GM, 7.5/7.625 in., 10-Bolt, Set

Part Number: RMG-GM75373TK

3.0 out of 5 stars ( 2 )

Estimated Ship Date: Nov 26, 2025 if ordered today

• Drop Ship
• Free Shipping
• Special Order

Crosspin Bolt, 5/16 in. Hex Head, Each

Part Number: YGA-33067

5.0 out of 5 stars ( 4 )

Estimated Ship Date: Today

Ring and Pinion Gears and Differential Combo, GM 8.5 in., 3.73:1, 30-spline Pinion, 28-spline Axle, Rear, Buick, Chevy, Oldsmobile, Pontiac, Kit

Part Number: YGA-12628

Not Yet Reviewed

Estimated Ship Date: Today

• Free Shipping

Differential Carrier Bearings, Steel, GM 8.5 in., Kit

Part Number: YGA-57009

4.0 out of 5 stars ( 5 )

Estimated Ship Date: Today

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: Today

• Free Shipping

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

Part Number: MGR-R7-5GRBMK

1.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

Pinion Shims, Steel, Kit

Part Number: YGA-55009

5.0 out of 5 stars ( 5 )

Estimated Ship Date: Today

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 )

Estimated Ship Date: Today

Ring and Pinion Gear Installation Assembly, Super Bearing Set - Timken, Rear, 2.25 in. O.D. Axle Bearing, GM, 8.5 in., 10-Bolt, Kit

Part Number: MGR-R10RSKT

4.0 out of 5 stars ( 4 )

Estimated Ship Date: Today

• Free Shipping

Gear, Ring and Pinion, 3.23:1 Ratio, GM, 7.5 in./7.625 in., 3 Series, Set

Part Number: MGR-G875323

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

• Free Shipping

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

• Free Shipping

Differential Cover Bolts, Steel, Black, Hex, Each

Part Number: SDH-34279

Not Yet Reviewed

Estimated Ship Date: Today

USA Standard Master Overhaul kit GM 8.5 in., Rear, Kit

Part Number: SPZ-37057

4.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

• Free Shipping

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

Part Number: YGA-32332

4.86 out of 5 stars ( 7 )

Estimated Ship Date: Today

Ring and Pinion Installation Kit, Super Kit, GM, 7.5 in., Kit

Part Number: MGR-R7-5GRBSKT

4.5 out of 5 stars ( 2 )

Estimated Ship Date: Today

• Free Shipping

Ring and Pinion-GM 8.5/8.625

Part Number: MGR-GM10-373A

Not Yet Reviewed

Estimated Ship Date: Nov 24, 2025 if ordered today

• Drop Ship
• Free Shipping
• Special Order

Axle C-Clips, One kit Per Axle, Steel, GM, Assortment 1 Thick,1 thin, Kit

Part Number: RNB-81050

4.57 out of 5 stars ( 7 )

Estimated Ship Date: Today

Spider Gears, Open, Front or Rear, Internal Kit, Side Gears, Cross Pin and Bolt, GM, 8.5 in., 28 Spline, Kit

Part Number: YGA-16054

4.0 out of 5 stars ( 4 )

Estimated Ship Date: Today

• Free Shipping

Differential Side Bearing Spacer; Differential Carrier Shims; For Ford 7.5 in./GM 7.5 in./GM 8.5 in./GM 8.2 in

Part Number: RMG-3800061

4.53 out of 5 stars ( 15 )

Estimated Ship Date: Today

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 )

Estimated Ship Date: Today

• Free Shipping

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

Part Number: MGR-GM10MSK

Not Yet Reviewed

Estimated Ship Date: Today

Gear, Ring and Pinion, 2.73:1 Ratio, GM 7.5/7.625 in., Set

Part Number: RNB-697-713

Not Yet Reviewed

Estimated Ship Date: Today

• Free Shipping

Replacement Springs, Powertrax Lock-Right, Kit

Part Number: PWT-1025350KAP

4.73 out of 5 stars ( 15 )

Estimated Ship Date: Today

Gear, Ring and Pinion, 3.73:1 Ratio, GM, 7.5 in./7.625 in., 10-Bolt, 3 Series, Set

Part Number: RMG-4900461

4.86 out of 5 stars ( 7 )

Estimated Ship Date: Today

• Free Shipping

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 )

Estimated Ship Date: Today