1978 Differential & Rear-End Components Transmission & Drivetrain - In Stock Filter Options - Vendor In Stock Filter Options - Free Shipping on Orders Over $109 at Summit Racing

Motive Gear Performance Ring and Pinion Sets F890430 Ford 9 in. 4.30 Gears

Gear, Ring and Pinion, 4.30:1 Ratio, Ford, 9 in., Set

Part Number: MGR-F890430

5.0 out of 5 stars ( 3 )

Estimated Ship Date: Monday 1/5/2026

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Estimated Ship Date: Monday 1/5/2026

Richmond Gear EXCel Ring and Pinion Sets 12BT342 GM 8.875 in. (12-bolt) truck 3.42 Gears

Gear, Ring and Pinion, EXCel, 3.42:1 Ratio, GM, 8.875 in., 12-Bolt Truck, Set

Part Number: RMG-12BT342

4.63 out of 5 stars ( 8 )

Estimated Ship Date: Monday 1/5/2026

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Richmond Gear EXCel Ring and Pinion Sets GM75342OE GM 7.5/7.625 in. 3.42 Gears

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

Part Number: RMG-GM75342OE

5.0 out of 5 stars ( 7 )

Estimated Ship Date: Monday 1/5/2026

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Summit Racing™ Positraction 28 Spline Differential Carriers Ford 8.8 Inch SUM-730942

Differential Carrier, Positraction, Nodular Iron, Ford 8.8 in., 28 Spline, Each

Part Number: SUM-730942

Not Yet Reviewed

Estimated Ship Date: Monday 1/5/2026

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Eaton Detroit Truetrac 30 Spline Differential Dana 44/44 IFS 913A592

Differential, Eaton Detroit Truetrac, Limited Slip, 30-Spline, Dana 44, Each

Part Number: ETN-913A592

Not Yet Reviewed

Estimated Ship Date: Monday 1/5/2026

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Hurst Limited-Slip 30 Spline Differential GM 8.875 Inch (12-bolt), truck 02-125

Differential, Posi Performance, Limited Slip, 30-Spline, 3.73 Gear Ratios, GM, 12-Bolt, Each

Part Number: HUU-02-125

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 1/5/2026

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Timken Differential Bearings SET45

Bearing, Differential Carrier, Kit

Part Number: TMK-SET45

4.44 out of 5 stars ( 9 )

Estimated Ship Date: Monday 1/5/2026

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Richmond Gear Pro Gear Ring and Pinion Sets 79-0003-1 Ford 9 in. 3.60 Gears

Gear, Pro Ring and Pinion, 3.60:1 Ratio, Ford, 9 in., Set

Part Number: RMG-7900031

Not Yet Reviewed

Estimated Ship Date: Monday 1/5/2026

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Motive Gear Ten Factory Axle Shafts for 1976-1982 CJ5, CJ7, 1981-1982 SCRAMBLER - MG22125

Axle Shafts, Direct Fit, 4140 Chromoly, 29-Spline, 26.250 in./23.250 in. Length, Jeep, Kit

Part Number: MGR-MG22125

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 1/5/2026

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Yukon Gear & Axle Ring and Pinion Gears YGK2335

Ring and Pinion Gears and Installation Kit, 8.5" GM 3.08 REAR R&P GEAR/ INSTALL KIT PACKAGE with 28spl POSI & AK 1563 AXLE BRGS (2.25" OD)

Part Number: YGA-12626

Not Yet Reviewed

Estimated Ship Date: Monday 1/5/2026

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Summit Racing™ 9 in. Ford Grand National Rear-End Assemblies for 1978-1987 REGAL, MONTE CARLO, 1980-1981 CUTLASS - SUM-CSUMCT006

Rear End Assembly, Grand National, Ford 9 in., 31-Spline Axles, 5 x 4.75 in. Pattern, G-Body Mounts, Kit

Part Number: SUM-CSUMCT006

Not Yet Reviewed

Estimated Ship Date: Monday 1/5/2026

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Yukon Gear & Axle 10 Bolt GM 8.5 Inch Differential Cover YHCC-GM8.5-S

Differential Cover, GM 8.5 in., 10-bolt, Nodular Iron, Black Powdercoated, Cadillac, Chevrolet, GMC, Each

Part Number: YGA-29113

Not Yet Reviewed

Estimated Ship Date: Monday 1/5/2026

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Motive Gear Performance Ring and Pinion Sets F890300 Ford 9 in. 3.00 Gears

Gear, Ring and Pinion, 3.00:1 Ratio, Ford, 9 in., Set

Part Number: MGR-F890300

4.75 out of 5 stars ( 4 )

Estimated Ship Date: Monday 1/5/2026

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Estimated Ship Date: Monday 1/5/2026

Yukon Gear & Axle Cut-to-Fit Axle Shafts YA F8-28-27.18

Axle Shaft, Cut-To-Fit, Bolt-in, 28-spline Inner, 1541H Alloy Steel, Rear, Ford 8 in., Ford, Mercury, Each

Part Number: YGA-21188

5.0 out of 5 stars ( 3 )

Estimated Ship Date: Monday 1/5/2026

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Yukon Gear & Axle Ring and Pinion Sets YG GM8.5-390 GM 8.5/8.6 in. 3.90 Gears

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 )

Estimated Ship Date: Monday 1/5/2026

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Richmond Gear Complete Ring and Pinion Installation Kits 83-1034-1

Ring and Pinion Installation Kit, Dana 60, 10-Bolt, 29-Spline Pinion, Kit

Part Number: RMG-8310341

4.0 out of 5 stars ( 10 )

Estimated Ship Date: Monday 1/5/2026

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Yukon Gear & Axle Crush Sleeve Eliminator Kits SK CSF8.8

Pinion Bearing Spacer, Crush Sleeve Eliminator, Steel, Ford 7.5 in., Ford 8.8 in., Each

Part Number: YGA-55040

3.57 out of 5 stars ( 7 )

Estimated Ship Date: Monday 1/5/2026

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USA Standard Gear Spartan Lockers GM 8.5 Inch SL GM8.5-28

Spartan Differential Locker, GM 8.5 in., 28-spline Axle, Buick, Oldsmobile, Pontiac, Chevy, GMC, Each

Part Number: SPZ-17040

5.0 out of 5 stars ( 5 )

Estimated Ship Date: Monday 1/5/2026

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Richmond Gear EXCel Ring and Pinion Sets 12BT373T GM 8.875 in. (12-bolt) truck 3.73 Gears

Gear, Ring and Pinion, EXCel, 3.73:1 Ratio, GM, 8.875 in., 12-Bolt Truck, Set

Part Number: RMG-12BT373T

3.88 out of 5 stars ( 8 )

Estimated Ship Date: Monday 1/5/2026

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Yukon Gear & Axle Ring and Pinion Sets YG GM14T-411 GM 10.5 in. (14-bolt) 4.11 Gears

Gear, Ring and Pinion, 4.11:1 Ratio, 1.750 in. Pinion, 30 Spline, 10.500 in. Ring Gear, GM 14 Bolt, Set

Part Number: YGA-24135

Not Yet Reviewed

Estimated Ship Date: Monday 1/5/2026

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Motive Gear Super Ring and Pinion Gear Installation Kits R12RSKT

Ring and Pinion Installation Kit, Super Kit, GM, 8.875 in., Kit

Part Number: MGR-R12RSKT

4.14 out of 5 stars ( 7 )

Estimated Ship Date: Monday 1/5/2026

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Yukon Gear & Axle Ring and Pinion Gear and Installation Kit Combos YGK2225 GM 8.875 in. (12-bolt) truck 3.08 Gears

Ring and Pinion Gears,Yukon Gear & Axle 8.875" GM 12 Bolt Truck, 3.08 Ratio Rear Ring & Pinion GearInstall Kit Axle Bearings & Seals

Part Number: YGA-10625

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 1/5/2026

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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 1/5/2026

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Spicer Drivetrain Products Genuine OE 10 Bolt Dana 44 Differential Cover 706112X

Differential Cover, Dana 44, OE Type, Front, Rear, 10-bolt, Steel, Black, Fill Plug, Drain Plug, Bolts, Chevy, Ford, Each

Part Number: SDH-706112X

3.67 out of 5 stars ( 3 )

Estimated Ship Date: Monday 1/5/2026

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Estimated Ship Date: Monday 1/5/2026

Motive Gear Ring and Pinion Sets GM10-342 GM 8.5/8.6 in. 3.42 Gears

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

Part Number: MGR-GM10-342

5.0 out of 5 stars ( 3 )

Estimated Ship Date: Monday 1/5/2026

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Estimated Ship Date: Monday 1/5/2026