1978 PONTIAC FIREBIRD Differential & Rear-End Components Transmission & Drivetrain - In Stock Filter Options - Vendor In Stock Filter Options

Yukon Gear & Axle Dura Grip Positraction Carriers GM 8.6 Inch YDGGM8.5-3-30-1

Dura Grip Positraction Carrier, Traction-Loc, GM 8.5/8.6 in., 30 Spline, 2.73 Up Ratio, Each

Part Number: YGA-26016

4.16 out of 5 stars ( 32 )

Estimated Ship Date: Monday 10/20/2025

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Estimated Ship Date: Monday 10/20/2025

Summit Racing™ Street-Strip Performance Clutch Kits SUM-700928

Clutch Kit, Street-Strip Performance, 1-1/8 in. Shaft, 10-Spline, 10.5 in. Organic/Ceramic Disc, GM, Kit

Part Number: SUM-700928

Not Yet Reviewed

Estimated Ship Date: Monday 10/20/2025

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Estimated Ship Date: Monday 10/20/2025

Yukon Gear & Axle Dura Grip Positraction Carriers GM 8.5 Inch YDGGM8.5-3-28-1

Dura Grip Positraction Carrier, Traction-Loc, GM 8.5 in., 28 Spline, 2.73 Up Ratio, Each

Part Number: YGA-26015

4.64 out of 5 stars ( 11 )

Estimated Ship Date: Monday 10/20/2025

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Estimated Ship Date: Monday 10/20/2025

Yukon Gear & Axle Ring and Pinion Sets YG GM8.5-373 GM 8.5/8.6 in. 3.73 Gears

Gear, Ring and Pinion, 3.73:1 Ratio, 1.625 in. Pinion, 30-Spline, GM 8.5/8.6 in., Set

Part Number: YGA-24158

4.1 out of 5 stars ( 10 )

Estimated Ship Date: Monday 10/20/2025

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Estimated Ship Date: Monday 10/20/2025

Richmond Gear EXCel Ring and Pinion Sets GM85410 GM 8.5/8.6 in. 4.10 Gears

Ring and Pinion Gears, EXCel, 4.10:1 Ratio, 30-spline, Standard Rotation, GM 8.5 in., GM 8.6 in., Set

Part Number: RMG-GM85410

4.0 out of 5 stars ( 8 )

Estimated Ship Date: Monday 10/20/2025

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Estimated Ship Date: Monday 10/20/2025

Motive Gear Performance Ring and Pinion Sets G885410 GM 8.5/8.6 in. 4.10 Gears

Gear, Ring and Pinion, 4.10:1 Ratio, GM, 8.5/8.6 in., Set

Part Number: MGR-G885410

4.89 out of 5 stars ( 9 )

Estimated Ship Date: Monday 10/20/2025

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Estimated Ship Date: Monday 10/20/2025

Richmond Gear Ring and Pinion Sets 49-0041-1 GM 8.5/8.6 in. 3.73 Gears

Gear, Ring and Pinion, 3.73:1 Ratio, GM, 8.5/8.6 in., 10-Bolt, 3 Series, Set

Part Number: RMG-4900411

4.47 out of 5 stars ( 19 )

Estimated Ship Date: Monday 10/20/2025

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Estimated Ship Date: Monday 10/20/2025

Yukon Gear & Axle Master Overhaul Kits YK GM8.5-HD

Ring and Pinion Gear Installation Kit, Master Overhaul, 30 Spline, GM 8.5 in., Kit

Part Number: YGA-14088

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 10/20/2025

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Estimated Ship Date: Monday 10/20/2025

Richmond Gear Ring and Pinion Sets 49-0278-1 GM 8.5/8.6 in. 3.42 Gears

Gear, Ring and Pinion, 3.42:1 Ratio, GM, 8.5/8.6 in., 10-Bolt, 3 Series, Set

Part Number: RMG-4902781

5.0 out of 5 stars ( 9 )

Estimated Ship Date: Monday 10/20/2025

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Estimated Ship Date: Monday 10/20/2025

Richmond Gear Ring and Pinion Sets 69-0165-1 GM 8.5/8.6 in. 4.10 Gears

Gear, Ring and Pinion, 4.10:1 Ratio, GM, 8.5/8.6 in., 10-Bolt, 3 Series, Set

Part Number: RMG-6901651

4.6 out of 5 stars ( 10 )

Estimated Ship Date: Monday 10/20/2025

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Estimated Ship Date: Monday 10/20/2025

Yukon Gear & Axle Ring and Pinion Sets YG GM8.5-342 GM 8.5/8.6 in. 3.42 Gears

Gear, Ring and Pinion, 3.42:1 Ratio, 1.625 in. Pinion, 30 Spline, 8.500 in. Ring Gear, GM 8.5/8.6 in., Set

Part Number: YGA-24157

5.0 out of 5 stars ( 3 )

Estimated Ship Date: Monday 10/20/2025

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Estimated Ship Date: Monday 10/20/2025

Yukon Gear & Axle Ring and Pinion Sets YG GM8.5-411 GM 8.5/8.6 in. 4.11 Gears

Gear, Ring and Pinion, 4.11:1 Ratio, 1.625 in. Pinion, 30 Spline, 8.500 in. Ring Gear, GM 8.5/8.6 in., Set

Part Number: YGA-24160

4.75 out of 5 stars ( 4 )

Estimated Ship Date: Monday 10/20/2025

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Estimated Ship Date: Monday 10/20/2025

Richmond Gear Ring and Pinion Sets 49-0019-1 GM 8.5/8.6 in. 3.23 Gears

Gear, Ring and Pinion, 3.23:1 Ratio, GM, 8.5/8.6 in., 10-Bolt, 3 Series, Set

Part Number: RMG-4900191

4.25 out of 5 stars ( 8 )

Estimated Ship Date: Monday 10/20/2025

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Estimated Ship Date: Monday 10/20/2025

USA Standard Gear Ring and Pinion Sets ZG GM8.5-373 GM 8.5/8.6 in. 3.73 Gears

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 )

Estimated Ship Date: Monday 10/20/2025

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Estimated Ship Date: Monday 10/20/2025

Motive Gear Ten Factory Axle Shafts MG22101

Axle Shafts, Direct Fit, Rear, 1541H Manganese, Chevy, GMC, Pontiac, 28-Spline, 30.12 Length, Kit

Part Number: MGR-MG22101

4.9 out of 5 stars ( 20 )

Estimated Ship Date: Monday 10/20/2025

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Estimated Ship Date: Monday 10/20/2025

Moser Engineering Replacement C-Clip Axles A102803

Axles, Direct Fit, C-Clip, Rear, 1541H Steel, 28-Spline, Chevy, 8.5 in.,Pair

Part Number: MSR-A102803

4.77 out of 5 stars ( 22 )

Estimated Ship Date: Monday 10/20/2025

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Estimated Ship Date: Monday 10/20/2025

Richmond Gear EXCel Ring and Pinion Sets GM75390 GM 7.5/7.625 in. 3.90 Gears

Ring and Pinion Gears, EXCel, GM 7.5/7.625 in., 3.90:1 Ratio, 27-spline, Standard, for 3.23 or Numerically Higher Ratio Carrier, Chevy, GMC, Olds, Set

Part Number: RMG-GM75390

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Monday 10/20/2025

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Estimated Ship Date: Monday 10/20/2025

B&M 10 Bolt GM 8.2/8.5/8.6 Inch Differential Cover 71502

Differential Cover, Rear, 10-bolt, Aluminum, Black Anodized, GM 8.2/8.5/8.6 in., Each

Part Number: BMM-71502

4.52 out of 5 stars ( 21 )

Estimated Ship Date: Monday 10/20/2025

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Estimated Ship Date: Monday 10/20/2025

Richmond Gear Ring and Pinion Sets 49-0034-1 GM 8.5/8.6 in. 3.90 Gears

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 )

Estimated Ship Date: Monday 10/20/2025

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Estimated Ship Date: Monday 10/20/2025

Powertrax Lock-Right Lockers GM 8.5 Inch 1920-LR

Differential, Lock-Right, Locker, 28-Spline, GM, 8.5 in., Each

Part Number: PWT-1920-LR

4.71 out of 5 stars ( 14 )

Estimated Ship Date: Monday 10/20/2025

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Estimated Ship Date: Monday 10/20/2025

Motive Gear Performance Ring and Pinion Sets G885373 GM 8.5/8.6 in. 3.73 Gears

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 )

Estimated Ship Date: Monday 10/20/2025

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Estimated Ship Date: Monday 10/20/2025

USA Standard Gear Ring and Pinion Sets ZG GM8.5-411 GM 8.5/8.6 in. 4.11 Gears

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

Part Number: SPZ-36216

Not Yet Reviewed

Estimated Ship Date: Monday 10/20/2025

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Estimated Ship Date: Monday 10/20/2025

Yukon Gear & Axle Ring and Pinion Sets YG GM8.5-456 GM 8.5/8.6 in. 4.56 Gears

Ring & Pinion Gear, 4.56 Ratio, GM, 8.5 in./8.6 in., Set

Part Number: YGA-24161

5.0 out of 5 stars ( 3 )

Estimated Ship Date: Monday 10/20/2025

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Estimated Ship Date: Monday 10/20/2025

Motive Gear Performance Ring and Pinion Sets G885342 GM 8.5/8.6 in. 3.42 Gears

Gear, Ring and Pinion, 3.42:1 Ratio, GM, 8.5/8.6 in., Set

Part Number: MGR-G885342

5.0 out of 5 stars ( 6 )

Estimated Ship Date: Monday 10/20/2025

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Estimated Ship Date: Monday 10/20/2025

Motive Gear Ring and Pinion Sets GM7.5-373 GM 7.5/7.625 in. 3.73 Gears

Gear, Ring and Pinion, 3.73:1 Ratio, GM, 7.5 in., Set

Part Number: MGR-GM75-373

Not Yet Reviewed

Estimated Ship Date: Monday 10/20/2025

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Estimated Ship Date: Monday 10/20/2025

Motive Gear Ring and Pinion Sets GM10-411 GM 8.5/8.6 in. 4.11 Gears

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 )

Estimated Ship Date: Monday 10/20/2025

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Estimated Ship Date: Monday 10/20/2025