1981 CHEVROLET K20 Transmission & Drivetrain

Spartan Differential Locker, GM 8.5 in., 28-spline Axle, Buick, Oldsmobile, Pontiac, Chevy, GMC, Each

Part Number: SPZ-17040

5.0 out of 5 stars ( 5 )

Estimated Ship Date: Today

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Differential Carrier Bearing, Rear, Steel, 2.250 in. Diameter, Chevy, GMC, Dodge, Mercedes-Benz, Workhorse

Part Number: TMK-387AS

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Today

Clutch Kit, Organic, 1 1/8 in.- 10-Spline, 12 in. Disc, Chevy/GMC, Pickup, SUV, Van, L6, V8, Kit

Part Number: ZZZ-MU9091-1

4.0 out of 5 stars ( 4 )

Estimated Ship Date: Today

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Flywheel, 153 Tooth, Nodular Iron, Chevrolet, V8, Internal Balance, Each

Part Number: MCL-450300

4.0 out of 5 stars ( 2 )

Estimated Ship Date: Today

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Clutch Kit, Street Twin, 1.125 in. - 26-spline, Sintered Bronze Disc, Pressure Plate, Billet Steel Flywheel, Chevy, Kit

Part Number: MCL-6400107M

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Estimated Ship Date: Mar 23, 2026 if ordered today

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Clutch Kit, Ceramic, 1-1/8 in. Shaft, 10-Spline, 11.875 in. Diameter Disc, Chevy, Pontiac, Oldsmobile, Kit

Part Number: SUM-700824

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Ring and Pinion Gear, 4.56:1 Ratio, GM, 8.5 in./8.6 in., Rear, Set

Part Number: SPZ-36218

Not Yet Reviewed

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U-Joint Straps, Spicer 1310 Style, Steel, Natural, Bolts, GM 8.875 in., Kit

Part Number: YGA-41196

4.43 out of 5 stars ( 7 )

Estimated Ship Date: Today

Differential Cover, 14-bolt, Steel, Natural, GM 9.5 in., Each

Part Number: YGA-32333

4.0 out of 5 stars ( 4 )

Estimated Ship Date: Today

Differential Shims, Carrier Type, 2.25 in. I.D., 3.00 in. O.D., Steel, Dodge, Ford, GM, Hummer, Isuzu, Jeep, Lincoln, Mazda, Mercury, Saab, Kit

Part Number: MGR-SS12

4.0 out of 5 stars ( 15 )

Estimated Ship Date: Today

Ring and Pinion Installation Kit, GM, 8.5 in., GM, Kit

Part Number: MGR-R10R

4.2 out of 5 stars ( 5 )

Estimated Ship Date: Today

Universal Joint, Super Strength, 1310-WJ Style, Solid, Steel, Each

Part Number: MOG-371

4.86 out of 5 stars ( 7 )

Estimated Ship Date: Today

• $20 Summit Bucks

Gear, Ring and Pinion, 4.11:1 Ratio, GM, 12-Bolt, Truck, Set

Part Number: MGR-GM12-411

Not Yet Reviewed

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Bearing Race, Pinion, 3.250 in. Diameter, Each

Part Number: TMK-M802011

5.0 out of 5 stars ( 6 )

Estimated Ship Date: Today

Vent, push-in, Axle, Transmission case

Part Number: RNB-14689

4.77 out of 5 stars ( 13 )

Estimated Ship Date: Today

Transmission Pan, Stock, Aluminum, Polished, TH400, Buick, Chevrolet, Oldsmobile, Pontiac, Each

Part Number: MRG-9796PMRG

3.0 out of 5 stars ( 3 )

Estimated Ship Date: Today

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

Part Number: MGR-R12RMK

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

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

Part Number: RMG-831018M

4.5 out of 5 stars ( 12 )

Estimated Ship Date: Today

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Ring and Pinion Installation Kit, Master Kit, GM, 10.5 in., Kit

Part Number: MGR-R14RMKH

5.0 out of 5 stars ( 6 )

Estimated Ship Date: Today

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Bearing, Rear Axle, Steel, Replacement, Each

Part Number: NTL-5707

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

Ring and Pinion Installation Kit, GM 8.5 in., (truck,front), Kit

Part Number: YGA-14087

Not Yet Reviewed

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Gear, Ring and Pinion, 4.56:1 Ratio, GM, 8.5/8.6 in., Set

Part Number: MGR-G885456

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

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Universal Joint, Spicer Select, 1350 Style, Greasable, Steel, Each

Part Number: SCY-25-3615X

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

Throwout Bearing, 1 3/8 in. Shaft Diameter, Buick, Chevy, GMC, Oldsmobile, Pontiac, Each

Part Number: HAY-70-201

4.0 out of 5 stars ( 4 )

Estimated Ship Date: Today

Torque Converters, Remanufactured, OEM Style, 1.875 in. Slotted Hub, 3 Pad, 13.0 in. Dia., 1,200 Stall, Avanti, Checker, Excalibur, GM, Jeep, V6, Each

Part Number: CCV-TQBU3

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

• Core Charge $75.00
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