1981 CHEVROLET K20 Transmission & Drivetrain

Differential, Posi Performance, Limited Slip, 30-Spline, 2.76-3.42 Gear Ratios, GM, 12-Bolt, Each

Part Number: HUU-02-124

4.0 out of 5 stars ( 1 )

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

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Differential Carrier Rebuild Kits and Spider Gears, Open Differential Internal Kits, GM 9.25/9.25 IFS/9.5 in., 33-spline, 14-bolt, Chevy, Dodge, Kit

Part Number: MGR-GM95BI

5.0 out of 5 stars ( 1 )

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

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Transmission Fluid Dipstick Components, Automatic Transmission Dipstick Tube Seals, Tube Grommet, 1.015 in. Bore Diameter, Ford, GM, Each

Part Number: ATP-SO35

4.0 out of 5 stars ( 2 )

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

Gear, Ring and Pinion, 4.88:1 Ratio, GM, 8.5/8.6 in., Set

Part Number: MGR-G885488

5.0 out of 5 stars ( 1 )

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

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Differential Shims, Carrier, Steel, GM, 8.5 in., 8.625 in., Kit

Part Number: MGR-GM10MSK

Not Yet Reviewed

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

Ring Gear Bolt

Part Number: MGR-14066913

4.75 out of 5 stars ( 4 )

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

Transmission Solenoid, Detent Solenoid, Downshift, Kickdown, GM, Each

Part Number: SMP-SZ1

3.2 out of 5 stars ( 5 )

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

Clutch Kit, 5/6-Speed Conversion, Organic, 1 .125 in.-26-Spline, 10.5 in. Diameter Disc, Buick, Checker, Chevy, GMC, Pontiac, Oldsmobile, Kit

Part Number: HAY-83-1100

Not Yet Reviewed

Estimated Ship Date: Mar 12, 2026 if ordered today

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Pressure Plate, Centerforce II, Diaphragm-Style, 12 in. Disc Diameter, Each

Part Number: CTF-CFT361909

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Mar 13, 2026 if ordered today

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Spider Gears, Internal Kit, Front or Rear, Side Gears, Cross Shaft Pin and Bolt, GM, 8.5 in., 30 Spline, Kit

Part Number: YGA-16055

2.0 out of 5 stars ( 1 )

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

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U-Joints, Gold Universal Joints, Greasable, Steel, for Nissan, AMC, Chevy, Dodge, Ford, GMC, International, Isuzu, Jeep, Mercury, Olds, Pontiac, Each

Part Number: ADO-45U0107

Not Yet Reviewed

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

Flywheel Fasteners, 12-point, 7/16-20 in. Thread, Steel, Black, Buick, Cadillac, Chevy, Ford, Jeep, Set of 6

Part Number: RNB-74070

3.88 out of 5 stars ( 8 )

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

Gear, Ring and Pinion, 4.11:1 Ratio, 1.750 in. Pinion, 30 Spline, 10.500 in. Ring Gear, GM 14 Bolt, Set

Part Number: YGA-24135

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

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Pressure Plate, Centerforce I, Diaphragm, 11 in. Disc Diameter, Buick, Chevy, Dodge, Ford, GMC, Oldsmobile, Pontiac, Each

Part Number: CTF-CF165552

5.0 out of 5 stars ( 1 )

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

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Automatic Shifter, Megashifter, Right Hand Drive Models, Chevy, Mopar, Ford, Lincoln, Mercury, Each

Part Number: BMM-80685

3.5 out of 5 stars ( 2 )

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

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Clutch Kit, Dual Friction, 1 1/8 in. Diameter, 26-Spline, 12 in. Diameter Disc, Chevy, V8, Kit

Part Number: CTF-DF612909

5.0 out of 5 stars ( 5 )

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

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Transmission Pan, Deep, Steel, Chrome, GM, TH400, Each

Part Number: BMM-20289

4.11 out of 5 stars ( 9 )

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

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Hub Service Kit, Standard, Chevy, GMC, Dodge, Ford, International, Jeep, Kit

Part Number: WRN-11967

Not Yet Reviewed

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

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

Part Number: MGR-GM12-373X

Not Yet Reviewed

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

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Ring & Pinion Gear, 4.56 Ratio, GM, 8.5 in./8.6 in., Set

Part Number: YGA-24161

5.0 out of 5 stars ( 3 )

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

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USA Standard Master Overhaul kit for the GM 8.5 front differential

Part Number: SPZ-37056

Not Yet Reviewed

Estimated Ship Date: Mar 10, 2026 if ordered today

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Transmission Filter, GM, Rolls-Royce, TH400, Kit

Part Number: ATP-B29

3.67 out of 5 stars ( 3 )

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

Flywheel and Flexplate Ring Gears, Steel, 168 Tooth, Chevrolet, Buick, Pontiac, Oldsmobile, Each

Part Number: RAM-13-168

5.0 out of 5 stars ( 3 )

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

Wheel Bearing Race, Front Inner, Steel, 0.650 in. Width, 3.500 in. O.D., Bentley, Dodge, Ford, GMC, Jeep, Each

Part Number: TMK-362A

Not Yet Reviewed

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

Differential Pinion Bearing, 1.125 in. Inside Diameter, Each

Part Number: TMK-02872

5.0 out of 5 stars ( 1 )

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