1981 CHEVROLET K20 Transmissions

Clutch Kit, 5/6-Speed Conversion, Organic, 1 .125 in.-26-Spline, 11 in. Diameter Disc, Buick, Checker, Chevy, GMC, Pontiac, Oldsmobile, Kit

Part Number: HAY-83-1102

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 2/23/2026 if shipped by air

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Detent Cable, Adjustable, 28-48 in. Length, Buick, Cadillac, Chevy, Oldsmobile, Pontiac, Each

Part Number: ATP-Y754

4.14 out of 5 stars ( 14 )

Estimated Ship Date: Monday 2/23/2026 if shipped by air

Flywheel, Aluminum, 13.5 lbs., Chevy, Each

Part Number: FIZ-198681

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Apr 20, 2026 if ordered today

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Hydraulic Throwout Bearing Conversion Kits, American Powertrain Hydramax Hydraulic Clutch Release Systems, Pedal Kit, Chevrolet, GMC, Sold as a Kit

Part Number: AWR-CAGM40007

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Estimated Ship Date: Apr 21, 2026 if ordered today

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Clutch Kit, Stock Replacement, 1.125 in. - 10-spline Input, Heavy-duty Disc, 12.00 in. Diameter, Pressure Plate, Checker, Chevy, GMC, Pontiac, Kit

Part Number: SXR-K1909-02HD

4.0 out of 5 stars ( 2 )

Estimated Ship Date: Monday 2/23/2026 if shipped by air

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Clutch Kits, Street 450 Clutch Conversion Kits, 1.125 in. - 10-spline, Single Organic Disc, 11.000 in. Diameter, Buick, Chevy, Olds, Pontiac, Kit

Part Number: HAY-91-1004

2.33 out of 5 stars ( 3 )

Estimated Ship Date: Mar 16, 2026 if ordered today

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Clutch Master Cylinder, Tilton Hydraulic, 0.750 in. Bore Size, Aluminum, Black, Two Outlets, Reservoir, Chevrolet, GMC, Kit

Part Number: BTM-4773873

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 2/23/2026 if shipped by air

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Tailshaft Housing, Aluminum, GM, TH400, Each

Part Number: TCI-226405

5.0 out of 5 stars ( 4 )

Estimated Ship Date: Monday 2/23/2026 if shipped by air

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Transmission Filter, Direct-Fit, Kit

Part Number: ATP-B37

5.0 out of 5 stars ( 3 )

Estimated Ship Date: Monday 2/23/2026 if shipped by air

Clutch Disc, 200 Series, 1.125 in. - 10-spline, Organic, 11.00 in. Diameter, AMC, Buick, Chevy, GMC, Jeep

Part Number: RAM-202

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Estimated Ship Date: Monday 2/23/2026 if shipped by air

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Clutch Kit, Ceramic, 1 1/8 in. Diameter Shaft, 10-Spline, 11 in. Diameter Disc, Kit

Part Number: ZZZ-30015

3.5 out of 5 stars ( 4 )

Estimated Ship Date: May 20, 2026 if ordered today

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Throwout Bearing, Replacement, Standard Style, Buick, Checker, Chevrolet, GMC, Oldsmobile, Pontiac, Each

Part Number: SXR-SN1716SA

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Estimated Ship Date: Monday 2/23/2026 if shipped by air

Clutch Fork, Steel, Black, Buick, Chevy, GMC, Oldsmobile, Pontiac, Each

Part Number: ATP-ZA100

4.44 out of 5 stars ( 9 )

Estimated Ship Date: Monday 2/23/2026 if shipped by air

Flywheel, Billet Steel, Low Inertia, 168-tooth, 20.85 lbs., Internal Balance, Chevy, Big Block, Small Block, Each

Part Number: CTF-600120

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 2/23/2026 if shipped by air

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Torque Converters, Twister Full Race, 4,200-4,500 rpm Stall Speed Range, 30-spline, 9.600 in. Diameter, Chevrolet THM400, Buick, Chevy, Jeep, Each

Part Number: HAY-97-1D42F

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Estimated Ship Date: Mar 16, 2026 if ordered today

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Clutch Kit, Street 650 Clutch Conversion, Performance, Single Disc, 1.125 in. - 10-spline, 11.000 in. Sintered Metallic Disc Diameter, Chevy, Jeep

Part Number: HAY-92-1004

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Estimated Ship Date: Mar 16, 2026 if ordered today

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Transmission Dipstick, Braided Stainless Steel, Black, Buick, Chevy, Oldsmobile, Pontiac, TH400, Each

Part Number: LOK-XTD-3400TM

3.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 2/23/2026 if shipped by air

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Transmission Filter, Inline, Hose Barbs, fits 5/16 in. Lines, 2 Hoses, 4 Clamps, Kit

Part Number: ATP-JX150

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Monday 2/23/2026 if shipped by air

Torque Converters, Remanufactured, OEM Style, 1.875 in. Slotted Hub, 3 Pad Mount, 12.00 in. Diameter, Stock Stall, 30 Spline Input, GM, Each

Part Number: CCV-TQBU16A

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Estimated Ship Date: Apr 27, 2026 if ordered today

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Flywheel, Aluminum, 12.0 lbs. 153-Tooth, Internal/External Engine Balance, Chevy, Each

Part Number: MCL-560300

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Estimated Ship Date: Mar 25, 2026 if ordered today

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Flywheel Fasteners, 12-point, 7/16-20 in. Thread, Steel, Black, AMC, Ford, GM, Set of 6

Part Number: RNB-14557

4.0 out of 5 stars ( 4 )

Estimated Ship Date: Monday 2/23/2026 if shipped by air

Automatic Transmission Bushings, Extension Housing, GM Transmission, Each

Part Number: DUR-GMT-3-2TG

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Estimated Ship Date: Monday 2/23/2026 if shipped by air

Transmission Overflow Tank, Pro-X, Aluminum, Black, 1 qt. Capacity, GM TH400, Each

Part Number: TCI-228005

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Estimated Ship Date: Monday 2/23/2026 if shipped by air

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Torque Converter, Holeshot, 2,800-3,200 rpm Stall Range, Chevy, THM350/THM400, Each

Part Number: BMM-20413

3.67 out of 5 stars ( 6 )

Estimated Ship Date: Monday 2/23/2026 if shipped by air

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Torque Converters, Twister Full Race, 2,400-2,800 rpm Stall Speed Range, 30-spline, 9.600 in. Diameter, Chevrolet THM400, Buick, Chevy, Jeep, Each

Part Number: HAY-97-1D24F

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Estimated Ship Date: Mar 16, 2026 if ordered today

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