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 417

Hughes Performance Pro-Street 30 Series 3,000 Stall Torque Converter 25-30LMHD

Hughes Performance Pro-Street 30 Series 3,000 Stall Torque Converter 25-30LMHD

Torque Converter, 3000 Stall, 4L80E Billet Cover, 3-disk, Lockup, Each

Part Number: HUP-25-30LMHD

Not Yet Reviewed

Estimated Ship Date: May 13, 2026 if ordered today

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Estimated Ship Date: May 13, 2026 if ordered today

Eaton Detroit Truetrac 30 Spline Differential GM 8.5/8.6 Inch 913A481

Differential, Eaton Detroit Truetrac, Limited Slip, 30-Spline, GM, 8.5/8.6 in., 2.73 & up, Each

Part Number: ETN-913A481

4.85 out of 5 stars ( 136 )

Estimated Ship Date: Today

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Eaton Detroit Truetrac 30 Spline Differential AAM 11.5 Inch 14-bolt 915A568

Differential, Eaton Detroit Truetrac, 30-Spline, AAM, 11.5 in., 14-Bolt, Each

Part Number: ETN-915A568

4.64 out of 5 stars ( 11 )

Estimated Ship Date: Today

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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: Today

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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: Today

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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: Today

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McLeod Steel 168-Tooth Flywheel 460535

Flywheel, Steel, 168-Tooth, 30 lb., Internal Engine Balance, Chevy, 0.400 in. Thicker, Each

Part Number: MCL-460535

4.0 out of 5 stars ( 5 )

Estimated Ship Date: Today

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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: Today

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Powertrax Grip Pro Traction Systems GM 8.5 Inch GT201030

Differential, Grip Pro Traction System, 30-Spline, GM 8.5in., 8.6 in., Each

Part Number: PWT-GT201030

5.0 out of 5 stars ( 5 )

Estimated Ship Date: Today

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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: Today

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Motive Gear 30 Spline Differential Carrier Cases GM 8.625 Inch GM8.6L

Differential Carrier, Open, GM 8.625 in., 30-Spline, Each

Part Number: MGR-GM8-6L

4.0 out of 5 stars ( 9 )

Estimated Ship Date: Today

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Yukon Gear & Axle Master Overhaul Kits YK GM8.6-B

Ring and Pinion Gear Installation Kit, Master Overhaul Kit, 30 Spline, GM 8.6 in., Kit

Part Number: YGA-14168

Not Yet Reviewed

Estimated Ship Date: Today

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Auburn Gear Grip-N-Loc 30 Spline Differential GM 8.5/8.6 Inch 546022

Differential, Auburn, Grip-N-Loc, Limited Slip, 30-Spline, GM, 8.5/8.6 in., 2.73 Ratio and up, Each

Part Number: AUB-546022

5.0 out of 5 stars ( 3 )

Estimated Ship Date: Today

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Yukon Gear & Axle Crush Sleeve Eliminator Kits for 2007-2024 WRANGLER, 2018 WRANGLER JK - SK CSJK-F

DIFFERENTIAL PINION BEARING SPACERS AND SLEEVES, Crush sleeve eliminator for JK Dana 30 & 44 front

Part Number: YGA-55078

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

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Eaton Electronic ELocker 30 Spline Differential Toyota 8 Inch 14211-1

Differential Carrier, Electronic ELocker Differential, Toyota 8 in., Steel, 30-spline Axle Shaft, for Use with 10-bolt Ring Gear Design, Toyota, Each

Part Number: ETN-14211-1

Not Yet Reviewed

Estimated Ship Date: Today

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Crown Automotive Ring Gear Bolt Kits 4720891

Ring Gear Bolts, Hex Head, 3/8 in. Thread Size, Steel, Black, Dana 30, Dana 35, Dana 44, Set of 10

Part Number: CWA-4720891

5.0 out of 5 stars ( 4 )

Estimated Ship Date: Today

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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 19, 2026 if ordered today

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Estimated Ship Date: Jun 19, 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: Today

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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: Today

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Powertrax Grip LS Traction Systems GM 8.5 Inch LS201030

Differential, Grip LS Traction System, 30-Spline, GM, 8.5 in., Each

Part Number: PWT-LS201030

1.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

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Estimated Ship Date: Today

Eaton Electronic ELocker 30 Spline Differential GM 8.6 Inch 19659-010

Differential, Posi Performance, Electric Locker, 30-Spline, GM, 8.5 in., Each

Part Number: ETN-19659-010

Not Yet Reviewed

Estimated Ship Date: Today

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Spicer Drivetrain Products Master Differential Rebuild Kits for 2018-2022 WRANGLER - 10040313

Bearing Kit, Master Differential Rebuild Kit, Jeep, Wrangler JL, Dana 30, Front, Kit

Part Number: SDH-10040313

Not Yet Reviewed

Estimated Ship Date: Today

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Yukon Gear & Axle Dura Grip Positraction Carriers AAM/Chrysler/GM 11.5 Inch YDGGM11.5-30-1

Differential Carrier, Dura Grip Positraction, Clutch-type, 30-spline, Rear, Each

Part Number: YGA-26033

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

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Spicer Drivetrain Products Axle Seals 52765

Axle and General Purpose Seals, Axle Seals, Dana 30/44, Original Design Seal, for Nissan, Jeep, Each

Part Number: SDH-52765

Not Yet Reviewed

Estimated Ship Date: Today

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Crown Automotive 27 Spline Differential Case Kits Dana 30, Jeep Wrangler JL 68388751AA

Differential Case Assembly, Front, Dana 30, with Carrier Bearing, Ring Gear Bolts, Jeep, JL, Kit

Part Number: CWA-68388751AA

Not Yet Reviewed

Estimated Ship Date: Jul 9, 2026 if ordered today

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Estimated Ship Date: Jul 9, 2026 if ordered today

Yukon Gear & Axle Dura Grip Positraction Carriers Toyota V6 YDGTV6-30-1

Differential Carrier, Dura Grip Positraction, Clutch-type, 30-spline, Nodular Iron, Rear, Toyota V6, Lexus, Toyota, Each

Part Number: YGA-26051

Not Yet Reviewed

Estimated Ship Date: Today

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