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Transmission & Drivetrain

Performance & Replacement Transmission & Drivetrain Parts

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Performance & Replacement Transmission & Drivetrain Parts

Building awesome horsepower is only part of the story. You need to deliver all that power to your car or truck’s wheels! We’ve got torque-hungry high performance automatic...

Building awesome horsepower is only part of the story. You need to deliver all that power to your car or truck’s wheels! We’ve got torque-hungry high performance automatic and manual transmissions for street and strip applications, torque converters and clutch sets, flexplates and flywheels, plus limited-slip differentials, spools, lockers, ring and pinion sets, driveshafts, U-joints, axles, bearings, C-clip eliminator kits, transfer cases, shift kits, and rebuild kits. We also have a wide selection of trans-brakes, shifters, cables, and accessories—everything you need to put the power to the ground, Summit style.

Building awesome horsepower is only part of the story. You need to deliver all that power to your car or truck’s wheels! We’ve got torque-hungry high performance automatic and manual transmissions for street and strip applications, torque converters and clutch sets, flexplates and flywheels, plus limited-slip differentials, spools, lockers, ring and pinion sets, driveshafts, U-joints, axles, bearings, C-clip eliminator kits, transfer cases, shift kits, and rebuild kits. We also have a wide selection of trans-brakes, shifters, cables, and accessories—everything you need to put the power to the ground, Summit style.

Showing In Stock Items. Show All 220 Items.

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Results 1 - 25 of 143

S&S Cycle Sprocket Shaft Oil Seals 31-4110

S&S Cycle Sprocket Shaft Oil Seals 31-4110

S&S Cycle Sprocket Shaft Oil Seals 31-4110

MAIN BEARING OIL SEAL 5PK

Part Number: SSY-31-4110

Not Yet Reviewed

Estimated Ship Date: May 8, 2026 if ordered today

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Estimated Ship Date: May 8, 2026 if ordered today

Powertrax Lock-Right Lockers GM 8.2 Inch 1940-LR

Powertrax Lock-Right Lockers GM 8.2 Inch 1940-LR

Powertrax Lock-Right Lockers GM 8.2 Inch 1940-LR

Differential, Lock-Right, Locker, 28-Spline, GM, 8.2 in., Each

Part Number: PWT-1940-LR

4.25 out of 5 stars ( 4 )

Estimated Ship Date: Tomorrow

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Estimated Ship Date: Tomorrow

Motive Gear Ring and Pinion Sets GM10-373 GM 8.5/8.6 in. 3.73 Gears

Motive Gear Ring and Pinion Sets GM10-373 GM 8.5/8.6 in. 3.73 Gears

Motive Gear Ring and Pinion Sets GM10-373 GM 8.5/8.6 in. 3.73 Gears

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

Part Number: MGR-GM10-373

4.74 out of 5 stars ( 19 )

Estimated Ship Date: Tomorrow

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Estimated Ship Date: Tomorrow

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

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

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

Ring and Pinion Gears, 4.11:1 Ratio, 30-spline, Standard Rotation, GM 8.5 in., GM 8.6 in., Set

Part Number: MGR-GM10-411A

4.71 out of 5 stars ( 7 )

Estimated Ship Date: Tomorrow

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Estimated Ship Date: Tomorrow

Motive Gear Ring and Pinion Sets GM10-342A GM 8.5/8.625 in. 3.42 Gears

Motive Gear Ring and Pinion Sets GM10-342A GM 8.5/8.625 in. 3.42 Gears

Motive Gear Ring and Pinion Sets GM10-342A GM 8.5/8.625 in. 3.42 Gears

Ring and Pinion Gears, 3.42:1 Ratio, 30-spline, Standard Rotation, GM 8.5 in., GM 8.6 in., Set

Part Number: MGR-GM10-342A

4.41 out of 5 stars ( 17 )

Estimated Ship Date: Tomorrow

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Estimated Ship Date: Tomorrow

Motive Gear Ring and Pinion Sets GM10.5-410 GM 10.5 in. (14-bolt) 4.10 Gears

Motive Gear Ring and Pinion Sets GM10.5-410 GM 10.5 in. (14-bolt) 4.10 Gears

Motive Gear Ring and Pinion Sets GM10.5-410 GM 10.5 in. (14-bolt) 4.10 Gears

Gear, Ring and Pinion, 4.10:1 Ratio, GM, 10.5 in., 14-Bolt, Fits 4.10:1 and Numerically Lower Carrier, Set

Part Number: MGR-GM10-5-410

4.86 out of 5 stars ( 7 )

Estimated Ship Date: Tomorrow

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Estimated Ship Date: Tomorrow

Motive Gear Ring and Pinion Sets GM7.5-410A GM 7.5/7.625 in. 4.10 Gears

Motive Gear Ring and Pinion Sets GM7.5-410A GM 7.5/7.625 in. 4.10 Gears

Motive Gear Ring and Pinion Sets GM7.5-410A GM 7.5/7.625 in. 4.10 Gears

Ring and Pinion Gears, GM 7.5/7.625 in., 4.10:1 Ratio, 27-spline, Standard Rotation, Buick, Cadillac, Chevy, GMC, Hummer, Isuzu, Olds, Pontiac, Set

Part Number: MGR-GM7-5-410A

5.0 out of 5 stars ( 3 )

Estimated Ship Date: Tomorrow

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Estimated Ship Date: Tomorrow

Motive Gear Ring and Pinion Sets GM10-456A GM 8.5/8.625 in. 4.56 Gears

Motive Gear Ring and Pinion Sets GM10-456A GM 8.5/8.625 in. 4.56 Gears

Motive Gear Ring and Pinion Sets GM10-456A GM 8.5/8.625 in. 4.56 Gears

Ring and Pinion Gears, 4.56:1 Ratio, 30-spline, Standard Rotation, GM 8.5 in., GM 8.6 in., Set

Part Number: MGR-GM10-456A

4.46 out of 5 stars ( 13 )

Estimated Ship Date: Tomorrow

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Estimated Ship Date: Tomorrow

Motive Gear Ring and Pinion Sets C9.25-392 Chrysler 9.25 in. 3.92 Gears

Motive Gear Ring and Pinion Sets C9.25-392 Chrysler 9.25 in. 3.92 Gears

Motive Gear Ring and Pinion Sets C9.25-392 Chrysler 9.25 in. 3.92 Gears

Ring and Pinion, Chrysler 9.25 in., 3.92:1 Ratio, Standard Rotation, Set

Part Number: MGR-C9-25-392

3.0 out of 5 stars ( 2 )

Estimated Ship Date: Tomorrow

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Estimated Ship Date: Tomorrow

Motive Gear Ring and Pinion Sets C9.25-355 Chrysler 9.25 in. 3.55 Gears

Motive Gear Ring and Pinion Sets C9.25-355 Chrysler 9.25 in. 3.55 Gears

Motive Gear Ring and Pinion Sets C9.25-355 Chrysler 9.25 in. 3.55 Gears

Gear, Ring and Pinion, 3.55:1 Ratio, Chrysler, 9.25 in., Set

Part Number: MGR-C9-25-355

5.0 out of 5 stars ( 9 )

Estimated Ship Date: Tomorrow

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Estimated Ship Date: Tomorrow

Motive Gear Ring and Pinion Sets GM10-373A GM 8.5 in. 3.73 Gears

Motive Gear Ring and Pinion Sets GM10-373A GM 8.5 in. 3.73 Gears

Motive Gear Ring and Pinion Sets GM10-373A GM 8.5 in. 3.73 Gears

Ring and Pinion-GM 8.5/8.625

Part Number: MGR-GM10-373A

Not Yet Reviewed

Estimated Ship Date: Tomorrow

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Estimated Ship Date: Tomorrow

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

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

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: Tomorrow

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Estimated Ship Date: Tomorrow

Motive Gear Ring and Pinion Sets F9-350 Ford 9 in. 3.50 Gears

Motive Gear Ring and Pinion Sets F9-350 Ford 9 in. 3.50 Gears

Motive Gear Ring and Pinion Sets F9-350 Ford 9 in. 3.50 Gears

Gear, Ring and Pinion, 3.50:1 Ratio, Ford, 9 in., Set

Part Number: MGR-F9-350

4.67 out of 5 stars ( 3 )

Estimated Ship Date: Tomorrow

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Estimated Ship Date: Tomorrow

Motive Gear Ring and Pinion Sets D44-354 Dana 44 3.54 Gears

Motive Gear Ring and Pinion Sets D44-354 Dana 44 3.54 Gears

Motive Gear Ring and Pinion Sets D44-354 Dana 44 3.54 Gears

Gear, Ring and Pinion, 3.54:1 Ratio, Dana 44, Set

Part Number: MGR-D44-354

4.83 out of 5 stars ( 6 )

Estimated Ship Date: Tomorrow

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Estimated Ship Date: Tomorrow

Motive Gear Ring and Pinion Sets F8.8-456 Ford 8.8 in. 4.56 Gears

Motive Gear Ring and Pinion Sets F8.8-456 Ford 8.8 in. 4.56 Gears

Motive Gear Ring and Pinion Sets F8.8-456 Ford 8.8 in. 4.56 Gears

Ring and Pinion Gears, 4.56:1 Ratio, Standard Ring Gear Rotation, Ford 8.8 in., Set

Part Number: MGR-F8-8-456

4.64 out of 5 stars ( 11 )

Estimated Ship Date: Tomorrow

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Estimated Ship Date: Tomorrow

Motive Gear Ring and Pinion Sets D44-373 Dana 44 3.73 Gears

Motive Gear Ring and Pinion Sets D44-373 Dana 44 3.73 Gears

Motive Gear Ring and Pinion Sets D44-373 Dana 44 3.73 Gears

Gear, Ring and Pinion, 3.73:1 Ratio, Dana 44, Set

Part Number: MGR-D44-373

4.5 out of 5 stars ( 4 )

Estimated Ship Date: Tomorrow

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Estimated Ship Date: Tomorrow

Motive Gear Ring and Pinion Sets GM12-342 GM 8.875 in. (12-bolt) truck 3.42 Gears

Motive Gear Ring and Pinion Sets GM12-342 GM 8.875 in. (12-bolt) truck 3.42 Gears

Motive Gear Ring and Pinion Sets GM12-342 GM 8.875 in. (12-bolt) truck 3.42 Gears

Gear, Ring and Pinion, 3.42:1 Ratio, GM, 8.875 in. Truck, Set

Part Number: MGR-GM12-342

Not Yet Reviewed

Estimated Ship Date: Tomorrow

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Estimated Ship Date: Tomorrow

Motive Gear Ring and Pinion Sets D44-456F Dana 44 4.56 Gears

Motive Gear Ring and Pinion Sets D44-456F Dana 44 4.56 Gears

Motive Gear Ring and Pinion Sets D44-456F Dana 44 4.56 Gears

Gear, Ring and Pinion, 4.56:1 Ratio, Dana 44, Reverse Cut, Set

Part Number: MGR-D44-456F

4.5 out of 5 stars ( 2 )

Estimated Ship Date: Tomorrow

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Estimated Ship Date: Tomorrow

Motive Gear Ring and Pinion Sets GM12-373 GM 8.875 in. (12-bolt) truck 3.73 Gears

Motive Gear Ring and Pinion Sets GM12-373 GM 8.875 in. (12-bolt) truck 3.73 Gears

Motive Gear Ring and Pinion Sets GM12-373 GM 8.875 in. (12-bolt) truck 3.73 Gears

Gear, Ring and Pinion, 3.73:1 Ratio, GM, 12-Bolt, Truck, Set

Part Number: MGR-GM12-373

5.0 out of 5 stars ( 7 )

Estimated Ship Date: Tomorrow

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Estimated Ship Date: Tomorrow

Motive Gear Ring and Pinion Sets GM10.5-373 GM 10.5 in. (14-bolt) 3.73 Gears

Motive Gear Ring and Pinion Sets GM10.5-373 GM 10.5 in. (14-bolt) 3.73 Gears

Motive Gear Ring and Pinion Sets GM10.5-373 GM 10.5 in. (14-bolt) 3.73 Gears

Gear, Ring and Pinion, 3.73:1 Ratio, GM, 10.5 in., 14-Bolt, Set

Part Number: MGR-GM10-5-373

4.75 out of 5 stars ( 4 )

Estimated Ship Date: Tomorrow

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Estimated Ship Date: Tomorrow

Motive Gear Ring and Pinion Sets GM10-390 GM 8.5/8.6 in. 3.90 Gears

Motive Gear Ring and Pinion Sets GM10-390 GM 8.5/8.6 in. 3.90 Gears

Motive Gear Ring and Pinion Sets GM10-390 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, Set

Part Number: MGR-GM10-390

3.0 out of 5 stars ( 2 )

Estimated Ship Date: Tomorrow

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Estimated Ship Date: Tomorrow

Motive Gear Ring and Pinion Sets F9-411A Ford 9 in. 4.11 Gears

Motive Gear Ring and Pinion Sets F9-411A Ford 9 in. 4.11 Gears

Motive Gear Ring and Pinion Sets F9-411A Ford 9 in. 4.11 Gears

Ring and Pinion Gears, Ford 9 in., 4.11:1 Ratio, 28-spline, Standard Rotation, Rear, Ford, Lincoln, Mercury, Set

Part Number: MGR-F9-411A

3.5 out of 5 stars ( 2 )

Estimated Ship Date: Tomorrow

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Estimated Ship Date: Tomorrow

Motive Gear Ring and Pinion Sets F8.8-488 Ford 8.8 in. 4.88 Gears

Motive Gear Ring and Pinion Sets F8.8-488 Ford 8.8 in. 4.88 Gears

Motive Gear Ring and Pinion Sets F8.8-488 Ford 8.8 in. 4.88 Gears

Ring and Pinion Gears, 4.88:1 Ratio, Standard Ring Gear Rotation, Ford 8.8 in., Set

Part Number: MGR-F8-8-488

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Tomorrow

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Estimated Ship Date: Tomorrow

Motive Gear Ring and Pinion Sets F9-300 Ford 9 in. 3.00 Gears

Motive Gear Ring and Pinion Sets F9-300 Ford 9 in. 3.00 Gears

Motive Gear Ring and Pinion Sets F9-300 Ford 9 in. 3.00 Gears

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

Part Number: MGR-F9-300

5.0 out of 5 stars ( 4 )

Estimated Ship Date: Tomorrow

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Estimated Ship Date: Tomorrow

Motive Gear Ring and Pinion Sets D60-354 Dana 60 3.54 Gears

Motive Gear Ring and Pinion Sets D60-354 Dana 60 3.54 Gears

Motive Gear Ring and Pinion Sets D60-354 Dana 60 3.54 Gears

Gear, Ring and Pinion, 3.54:1 Ratio, Dana 60, Set

Part Number: MGR-D60-354

5.0 out of 5 stars ( 4 )

Estimated Ship Date: Tomorrow

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Estimated Ship Date: Tomorrow