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.

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Results 1 - 25 of 312

McLeod Steel 130-Tooth Flywheel 464102

Flywheel, Steel, 130-Tooth, 27 lbs., Internal/External Engine Balance, Mopar, L6, Big, Small Block V8, Each

Part Number: MCL-464102

5.0 out of 5 stars ( 4 )

Estimated Ship Date: Tomorrow

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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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Eaton Detroit Truetrac 27 Spline Differential Dana 30 912A585

Differential, Eaton Detroit Truetrac, 27-Spline, Dana 30, Each

Part Number: ETN-912A585

4.67 out of 5 stars ( 15 )

Estimated Ship Date: Tomorrow

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USA Standard Gear Spartan Lockers Dana 30 SL D30-27

Spartan Differential Locker, Dana 30, 27-spline Axle, Jeep, Ford, International, Each

Part Number: SPZ-17000

5.0 out of 5 stars ( 6 )

Estimated Ship Date: Tomorrow

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Eaton Electronic ELocker 27 Spline Differential Dana 30 19818-020

Differential, Electronic Locker, ELocker, 27-Spline, Dana 30, 3-Series, Each

Part Number: ETN-19818-020

Not Yet Reviewed

Estimated Ship Date: Tomorrow

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Crown Automotive Manual Locking Hubs 400502

Locking Hubs, Manual, 27-spline, 6 Bolts, Chrome Steel Housing, Black Plastic Dial, Jeep, Set

Part Number: CWA-400502

5.0 out of 5 stars ( 3 )

Estimated Ship Date: Tomorrow

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Yukon Gear & Axle Differential Pinion Yokes YY GM40015850

Yoke, Differential Location, 27-spline Inner, Steel, Mechanics 3R U-joint Style, Rear, GM 7.5 in., GM 7.6 in.

Part Number: YGA-41088

5.0 out of 5 stars ( 3 )

Estimated Ship Date: Tomorrow

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Yukon Gear & Axle Dura Grip Positraction Carriers Dana 35 YDGM35-4-27-1

Differential Carrier, Dura Grip Positraction, Clutch-type, 27-spline, Nodular Iron, Dana 35, Each

Part Number: YGA-26055

3.0 out of 5 stars ( 1 )

Estimated Ship Date: Tomorrow

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Eaton Detroit Truetrac 27 Spline Differential Dana 30 912A588

Differential, Eaton Detroit Truetrac, 27-Spline, Dana 30 10-Bolt, Volvo, Each

Part Number: ETN-912A588

5.0 out of 5 stars ( 5 )

Estimated Ship Date: Tomorrow

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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: Tomorrow

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Spicer Drivetrain Products Pinion Oil Slingers and Baffles 32349

Outer Pinion Bearing Oil Slinger, Dana 30, Dana Super 30, Dana 25, Dana 27, Dana 44, Front, Rear, Each

Part Number: SDH-32349

4.5 out of 5 stars ( 2 )

Estimated Ship Date: Tomorrow

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Yukon Gear & Axle Spider Gear Kits YPKD30-S-27

Spider Gear Kit, Open Differential, Dana 30/ Dana Super 30, 27 Spline, Kit

Part Number: YGA-16073

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Tomorrow

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Motive Gear Ten Factory Axle Shafts for 1972-1981 CJ5, 1972-1975 CJ6, 1976-1981 CJ7 - MG22139

Axle Shafts, Direct Fit, Dana 30, Performance, 27-Spline Inner, Length - 35.74 in. L/22.86 in. R, 4340 Chromoly, Black Oxide Finish, Jeep, Kit

Part Number: MGR-MG22139

4.0 out of 5 stars ( 1 )

Estimated Ship Date: Tomorrow

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Yukon Gear & Axle Ring and Pinion Sets YG GM7.5-373 GM 7.5/7.6 in. 3.73 Gears

Gear, Ring and Pinion, 3.73:1 Ratio, 1.438 in. Pinion, 27 Spline, 7.500 in. Ring Gear, GM 7.5/7.6 in., Set

Part Number: YGA-24146

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Tomorrow

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Yukon Gear & Axle Zip Lockers Dana 30/Super 30 YZLD30-4-27

Zip Locker, Air Locker, Dana 30/Super 30, 27 Spline, 3.73 Up Ratio, Each

Part Number: YGA-34016

Not Yet Reviewed

Estimated Ship Date: May 18, 2026 if ordered today

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Estimated Ship Date: May 18, 2026 if ordered today

Yukon Gear & Axle 27 Spline Differential Carrier Cases Dana 30 YC D706008

Differential Carrier, Open Case, 3 Series, for 10-Bolt Cover, Dana 30, 27-Spline, 3.73 and Up Ratio, AMC, Ford family, International, Jeep, Volvo,Each

Part Number: YGA-20026

1.0 out of 5 stars ( 1 )

Estimated Ship Date: Tomorrow

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SVL Drivetrain Ring and Pinion Gear Sets 2020395 GM 7.5/7.6 in. 3.73 Gears

Ring and Pinion Gears, GM 7.5/7.6 in., 3.73:1 Ratio, 27-spline, Standard Rotation, GM 7.5/7.6 in., Set

Part Number: SVL-2020395

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Tomorrow

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Yukon Gear & Axle Spider Gear Kits YPKM35-S-27-1.5

Spider Gear Kit, Open Differential, Dana 35, 27 Spline, Kit

Part Number: YGA-16128

4.8 out of 5 stars ( 5 )

Estimated Ship Date: Tomorrow

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ARB Air Locker 27 Spline Differential Dana 30 RD100

Air Locker, Dana 30, 27-Spline, 3.73 and Up Ratio, Each

Part Number: ARB-RD100

Not Yet Reviewed

Estimated Ship Date: Jun 22, 2026 if ordered today

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Estimated Ship Date: Jun 22, 2026 if ordered today

Need It Sooner? We recommend these similar substitute parts:

Eaton Electronic ELocker 27 Spline Differential Dana 30 19818-020

Not Yet Reviewed

Estimated Ship Date: Tomorrow

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Powertrax Lock-Right Lockers Chrysler 8.25 Inch 1230-LR

Differential, Lock-Right, Locker, 27-Spline, Mopar, 8.25 in., Each

Part Number: PWT-1230-LR

4.0 out of 5 stars ( 1 )

Estimated Ship Date: Jun 5, 2026 if ordered today

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Estimated Ship Date: Jun 5, 2026 if ordered today

Powertrax Lock-Right Lockers Dana 35 2310-LR

Differential, Lock-Right, Locker, 27-Spline, Dana 35, Each

Part Number: PWT-2310-LR

4.67 out of 5 stars ( 3 )

Estimated Ship Date: Jun 8, 2026 if ordered today

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Estimated Ship Date: Jun 8, 2026 if ordered today

ATP Automatic Transmission Oil Pump Seals and Gaskets SGS-27

Automatic Transmission Pump Gaskets, Replacement, 17 Bolt Holes, Paper, GM, TH350, Each

Part Number: ATP-SGS27

Not Yet Reviewed

Estimated Ship Date: Tomorrow

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Yukon Gear & Axle Differential Pinion Yokes YY GM7827670

Yoke, 27-spline Inner, Cast Steel, 3.500 in. Overall Length, Rear, GM 7.5 in., GM 7.625 in., Each

Part Number: YGA-41090

4.67 out of 5 stars ( 3 )

Estimated Ship Date: Tomorrow

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SVL Drivetrain Spider Gear Kits 10020714

Differential Carrier Rebuild Kits and Spider Gears, Dana 30, Side Gears, Front, Open, 27-spline, 10-bolt, Dana 30, Dana 30 Jeep Wrangler JK, TJ, Kit

Part Number: SVL-10020714

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Tomorrow

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Motive Gear Ten Factory Axle Shafts MG20128B

Axle Shaft, Direct Fit, 4340 Chromoly, 27-Spline, 8.720 in. Length, International, Jeep, Each

Part Number: MGR-MG20128B

Not Yet Reviewed

Estimated Ship Date: Tomorrow

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