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

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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Summit Racing™ OE Replacement 168-Tooth Flywheel SUM-700086

Flywheel, Cast Iron, 168-tooth, 30 lbs., External Engine Balance, Chevy, GMC, 400, Each

Part Number: SUM-700086

Not Yet Reviewed

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McLeod RST Street Twin Clutch Kits 6911-04

Clutch Kit, RST, 1 1/8 in. x 10-Spline, 9.688 in. Diameter Disc, Chevy, Small/Big Block, Kit

Part Number: MCL-6911-04

5.0 out of 5 stars ( 1 )

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McLeod StreetPro Clutch Kits 75108

Clutch Kit, StreetPro, Organic, 1 in.- 23-Spline, 11 in. Disc, Chrysler, 360, 383, Kit

Part Number: MCL-75108

3.25 out of 5 stars ( 4 )

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McLeod RST Street Twin Clutch Kits 6913-04

Clutch Kit, RST, 1 1/8 in. x 10-Spline, 10.50 in. Diameter Disc, Chevy, Small/Big Block, Kit

Part Number: MCL-6913-04

5.0 out of 5 stars ( 1 )

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Timken Wheel Bearings SET3

Wheel Bearing, Front Outer, Each

Part Number: TMK-SET3

4.65 out of 5 stars ( 26 )

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Yukon Gear & Axle Dura Grip Positraction Carriers GM 8.5 Inch, Corvette YDGGMVET-3-17-1

Differential Carrier, Dura Grip Positraction, Clutch-type, 17-spline, Rear, GM 8.5 in. Corvette, Chevy, Each

Part Number: YGA-26023

5.0 out of 5 stars ( 1 )

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Summit Racing™ SFI-Approved Flexplates SUM-G123SFI

Flexplate, Internal Balance, Mopar SB and BB, TF-727 10 in. or 11.125 in. Converter, 6 Bolt Crank, SFI 29.1, Each

Part Number: SUM-G123SFI

Not Yet Reviewed

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FTI Performance TH400 U-Build It Kits F4019-5

Automatic Transmission Rebuild Kit, U-Build It, Steels, 5 Clutches, Gaskets, Seals, Filter, Chevy, TH400, Kit

Part Number: FTI-F4019-5

Not Yet Reviewed

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Ford Performance Parts 157-Tooth Flywheel M-6375-D302B

Flywheel, Billet Steel, 157-Tooth, 25 lb., Internal Engine Balance, Ford, 5.0L/302, Each

Part Number: FMS-M-6375-D302B

4.86 out of 5 stars ( 14 )

Estimated Ship Date: Tomorrow

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TransGo Performance Shift Kits 350-1&2

Shift Kit, Performance, Buick, Chevy, Oldsmobile, Pontiac, GMC, TH350, 1969-81, Kit

Part Number: TRG-350-1-2

4.41 out of 5 stars ( 56 )

Estimated Ship Date: Tomorrow

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BluePrint Engines SFI-Approved 168-Tooth Flexplate BPP168T2P

Flexplate, 168-Tooth, Internal Engine Balance, 2-Piece Rear Main Seal, SFI 29.1, Chevrolet, Each

Part Number: MLL-BPP168T2P

Not Yet Reviewed

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Richmond Gear Complete Ring and Pinion Installation Kits 83-1018-1

Ring and Pinion Installation Kit, GM 8.875 in., Truck 12-Bolt, 30-Spline Pinion, Kit

Part Number: RMG-8310181

3.64 out of 5 stars ( 14 )

Estimated Ship Date: Tomorrow

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TCI Forged 168-Tooth Flexplate 399473

Flexplate, 168-Tooth, External Engine Balance, 2-Piece Rear Main Seal, SFI 29.1, Chevy, 454, Each

Part Number: TCI-399473

4.75 out of 5 stars ( 20 )

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RAM HDX Clutch Kits 88764HDX

Clutch Kit, Organic, 1.125 in.- 26-Spline, 11.00 in. Disc, GM, V8, Kit

Part Number: RAM-88764HDX

4.0 out of 5 stars ( 5 )

Estimated Ship Date: Tomorrow

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Centerforce Dual Friction Clutch Kits KDF240916

Clutch Kit, Dual Friction, 1.125 in. - 10-spline, Organic/Carbon Composite Disc, Pressure Plate, Chevy, GMC, Kit

Part Number: CTF-KDF240916

4.89 out of 5 stars ( 9 )

Estimated Ship Date: Tomorrow

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RAM Powergrip HD Clutch Kits 98764HD

RAM Powergrip HD Clutch Kits 98764HD

Clutch Kit, Powergrip, HD, Metallic, 1 1/8 in.- 26-Spline, 11 in. Disc, GM, V8, Kit

Part Number: RAM-98764HD

5.0 out of 5 stars ( 5 )

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Eaton Detroit Lockers Ford 9 Inch 187SL17B

Differential, Eaton Detroit Locker, 31-Spline, Ford, 9 in., Each

Part Number: ETN-187SL17B

4.88 out of 5 stars ( 8 )

Estimated Ship Date: Jan 26, 2026 if ordered today

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Estimated Ship Date: Jan 26, 2026 if ordered today

Need It Sooner? We recommend these similar substitute parts:

Summit Racing™ Ford 9 in. Trac-Loc 31 Spline Differential Ford 9 Inch SUM-CTF9TRACL31

4.5 out of 5 stars ( 18 )

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Eaton Electronic ELocker 30 Spline Differential Toyota 9.5 Inch 14212-1

Differential, Electronic Locker, ELocker, 30-Spline, Toyota 9.5 in., Toyota, Land Cruiser 40, 60, 70, 80 Series, Each

Part Number: ETN-14212-1

Not Yet Reviewed

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Motive Gear Ring and Pinion Sets F8.8-373 Ford 8.8 in. 3.73 Gears

Gear, Ring and Pinion, 3.73:1 Ratio, Ford, 8.8 in., Set

Part Number: MGR-F8-8-373

Not Yet Reviewed

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Hurst Competition/Plus Installation Kits 3738609

Shifter Installation Kit, Competition Plus, Borg Warner Super T-10, Code 454, Chevy, Pontiac, Kit

Part Number: HUU-3738609

4.67 out of 5 stars ( 9 )

Estimated Ship Date: Tomorrow

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Yukon Gear & Axle Dura Grip Positraction Carriers Ford 7.5 Inch YDGF7.5-28

Differential Carrier, Dura Grip Positraction, Traction-Lok, 28-spline, Rear, Ford 7.5 in., Ford, Mercury, Each

Part Number: YGA-26034

4.75 out of 5 stars ( 8 )

Estimated Ship Date: Tomorrow

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Summit Racing™ Street-Strip Performance Clutch Kits SUM-700930

Clutch Kit, Street-Strip Performance, 1-1/8 in. Shaft, 26-Spline, 11 in. Organic/Ceramic Disc, GM, Kit

Part Number: SUM-700930

5.0 out of 5 stars ( 1 )

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Hughes Performance Street and Strip Transmissions 35-1D

Automatic Transmission, Forward Shift Pattern, Automatic, Manual Valve Body, Chevy, TH350, Each

Part Number: HUP-35-1D

Not Yet Reviewed

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ARP Pro Series Flywheel Bolts 330-2801

Flywheel Bolts, Pro Series, Chromoly, Black Oxide, 12-Point, 7/16 in. x .875 in., Chevy, Small Block, Set 6

Part Number: ARP-330-2801

4.92 out of 5 stars ( 12 )

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