1981 CHEVROLET K20 Transmission & Drivetrain - In Stock Filter Options - Vendor In Stock Filter Options

ATP Clutch Forks ZA-100

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

Part Number: ATP-ZA100

4.44 out of 5 stars ( 9 )

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Motive Gear Ring and Pinion Sets GM12-411A GM 8.875 in. (12-bolt) truck 4.11 Gears

Ring and Pinion-GM 8.875

Part Number: MGR-GM12-411A

Not Yet Reviewed

Estimated Ship Date: Mar 16, 2026 if ordered today

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Estimated Ship Date: Mar 16, 2026 if ordered today

B&M Transmission Brackets and Levers 30498

Cable Bracket, Replacement, Used With Bandit Shifters, GM, TH250/TH350/TH375/TH400/2004R/700R4, Each

Part Number: BMM-30498

3.89 out of 5 stars ( 9 )

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Mile Marker Hub Service Kits 402SK

Replacement, Service Kit for Hub, Kit

Part Number: MMK-402-SK

Not Yet Reviewed

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Sachs Stock Replacement 168-Tooth Flywheel NFW1007

Flywheel, Replacement, 168-tooth, 6-bolt, Cast Iron, 14.150 in. Diameter, Chevrolet, Each

Part Number: SXR-NFW1007

Not Yet Reviewed

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USA Standard Gear Spider Gear Sets ZIKGM8.5-S-28

Differential Carrier Rebuild Kits and Spider Gears, GM 8.5 in., Side Gears, 28-spline, 10-bolt, Buick, Chevrolet, GMC, Oldsmobile, Pontiac, Kit

Part Number: SPZ-39026

5.0 out of 5 stars ( 1 )

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Motive Gear Differential Cross Shafts and Fasteners 3931175

Cross Pin, GM, 12-Bolt, 8.875 in., Each

Part Number: MGR-3931175

5.0 out of 5 stars ( 2 )

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Richmond Gear EXCel Ring and Pinion Sets 12BT410 GM 8.875 in. (12-bolt) truck 4.10 Gears

Gear, Ring and Pinion, EXCel, 4.10:1 Ratio, GM, 8.875 in., 12-Bolt Truck, Set

Part Number: RMG-12BT410

5.0 out of 5 stars ( 1 )

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Motive Gear Transfer Case Components 4167966R

RANGE FORK

Part Number: MGR-4167966R

5.0 out of 5 stars ( 4 )

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Richmond Gear Mini-Spools 78-1028-1

Spool, Mini, Steel, 28-Spline, 10-Bolt, GM 8.5 in., Each

Part Number: RMG-78-1028-1

4.33 out of 5 stars ( 6 )

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USA Standard Gear Ring and Pinion Sets ZG GM14T-373 GM 10.5 in. (14-bolt) 3.73 Gears

Ring and Pinion Gears, 3.73:1 Ratio, 30-spline, Standard Ring Gear Rotation, GM 10.5 in. (14-bolt), Rear, Chevrolet, GMC, Set

Part Number: SPZ-36182

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Yukon Gear & Axle Master Overhaul Kits YK GM8.5-HD-F

Yukon Master Overhaul kit for GM 8.5" front differential with aftermarket positraction

Part Number: YGA-14089

Not Yet Reviewed

Estimated Ship Date: Mar 25, 2026 if ordered today

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Estimated Ship Date: Mar 25, 2026 if ordered today

Hays Twister Full Race 4,200-4,500 Stall Torque Converter 97-1D42F

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

Not Yet Reviewed

Estimated Ship Date: Mar 16, 2026 if ordered today

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Estimated Ship Date: Mar 16, 2026 if ordered today

Motive Gear Light-Duty Axle Shafts GM10FAXR

Axle Shaft, OEM Replacement, Front Inner and Outer, Passenger Side, 1541H Manganese, 28/19-spline, 29.090 in. Length, GMC, Kit

Part Number: MGR-GM10FAXR

4.0 out of 5 stars ( 1 )

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B&M Transmission Brackets and Levers 30499

Transmission Bracket, Steel, Natural, Buick, Chevy, Oldsmobile, Pontiac, Each

Part Number: BMM-30499

4.5 out of 5 stars ( 6 )

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Yukon Gear & Axle Pinion Nut Washers YSPPN-033

Pinion Nut Washer, GM, Each

Part Number: YGA-33167

5.0 out of 5 stars ( 2 )

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Motive Gear Ten Factory Axle Shafts MG20127B

Axle Shaft, Direct Fit, 4340 Chromoly, 19-Spline, 9.940 in. Length, Chevy, GMC, Jeep, Each

Part Number: MGR-MG20127B

Not Yet Reviewed

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Timken Pinion Bearings 31594

Tapered Bearing, Roller, Each

Part Number: TMK-31594

5.0 out of 5 stars ( 2 )

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Eaton Detroit Lockers GM 9.5 Inch 225C135A

Differential, Eaton Detroit Locker, 33-Spline, GM, 9.5 in., 14-Bolt, Each

Part Number: ETN-225C135A

5.0 out of 5 stars ( 3 )

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Richmond Gear EXCel Ring and Pinion Gear Installation Kits XL-1063-1

Ring and Pinion Installation Kit, Complete, GM 10.5 in. (14-bolt), Rear, Kit

Part Number: RMG-XL-1063-1

Not Yet Reviewed

Estimated Ship Date: Mar 16, 2026 if ordered today

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Estimated Ship Date: Mar 16, 2026 if ordered today

Timken Pinion Bearing Races HM803110

Pinion Bearing Race, Fits Bearing with 3.500 in. Outside Diameter, Each

Part Number: TMK-HM803110

Not Yet Reviewed

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Yukon Gear & Axle 10 Bolt GM 8.5 Inch (truck, front) Differential Cover YP C2-GM8.5-F

Differential Cover, 10-bolt, Aluminum, Polished, GM 8.5 in., Each

Part Number: YGA-32029

Not Yet Reviewed

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Richmond Gear Complete Ring and Pinion Installation Kits 83-1020-1

Ring and Pinion Installation Kit, Bearings and Shims, 8.5 in. GM Front, Kit

Part Number: RMG-8310201

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Timken Pinion Bearing Races 31520

Pinion Bearing Race, 3.000 in. Diameter, Each

Part Number: TMK-31520

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Hays Street 650 Clutch Conversion Kits 92-1004

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

Not Yet Reviewed

Estimated Ship Date: Mar 16, 2026 if ordered today

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Estimated Ship Date: Mar 16, 2026 if ordered today