1973 PONTIAC FIREBIRD Differential & Rear-End Components

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

Part Number: SPZ-36214

4.5 out of 5 stars ( 6 )

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Ring Gear Bolt

Part Number: MGR-14066913

4.75 out of 5 stars ( 4 )

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

Part Number: MGR-GM10MSK

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Differential Carrier, Spartan Locker, Steel, 30-spline, Rear, GM 8.5 in., Each

Part Number: SPZ-17041

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Estimated Ship Date: Dec 29, 2025 if ordered today

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Carrier Shims, Super, Steel, Kit

Part Number: YGA-55001

4.87 out of 5 stars ( 15 )

Estimated Ship Date: Today

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 )

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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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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 )

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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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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 and Differential Combo, GM 8.5 in., 3.42:1 Ratio, 28-Spline, Buick, Chevy, Oldsmobile, Pontiac, Kit

Part Number: YGA-12627

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Pinion Shims, Steel, Kit

Part Number: YGA-55008

5.0 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 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 depth shim kit for Toyota8", GM 7.5", 8.2" & 12 bolt truck

Part Number: YGA-55064

5.0 out of 5 stars ( 2 )

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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 )

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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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Crate Axle, 70-81 GM Camaro/F-Body Centurion 9-Inch, Black PC, 31-Spline, 4.11 Ratio, Helical Limited Slip, Wilwood 11" Dynapro Black Calipers

Part Number: CUR-CR-GF341TWAB

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Cross Pin, GM, 10-Bolt, 8.5 in. Each

Part Number: MGR-14006401

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Pinion Nut, Steel, Each

Part Number: YGA-33152

5.0 out of 5 stars ( 2 )

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Differential Cross Shaft, Steel, 0.795 in. Diameter, Each

Part Number: YGA-33401

5.0 out of 5 stars ( 1 )

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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: Jan 8, 2026 if ordered today

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Differential Carrier Bearing, Races Included, Koyo Bearing, Steel, Set

Part Number: MGR-706016XR

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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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