1981 GMC K1500 Transmission & Drivetrain

Flywheel, Cast Iron, 168-Tooth, 30 lb., Internal Engine Balance, Chevy, Small Block, Each

Part Number: SUM-700080

4.64 out of 5 stars ( 11 )

Estimated Ship Date: Monday 1/19/2026

• Free Shipping

Gear, Ring and Pinion, 3.73 Ratio, GM, 8.5 in/8.6 in., Set

Part Number: MGR-GM10-373

4.74 out of 5 stars ( 19 )

Estimated Ship Date: Monday 1/19/2026

• Free Shipping

Ring and Pinion Installation Kit, GM, 8.5 in., 8.6 in., 10-Bolt, Spline Pinion, Kit

Part Number: RMG-8310211

4.25 out of 5 stars ( 40 )

Estimated Ship Date: Monday 1/19/2026

• Free Shipping

Transmission Dipstick, Braided Stainless Steel Tube, Flexible, Aluminum Handle, Firewall Mount, TH350, TH400, Each

Part Number: LOK-TD-3350400FM

4.68 out of 5 stars ( 88 )

Estimated Ship Date: Monday 1/19/2026

• Free Shipping

Ring and Pinion Gears, 4.11:1 Ratio, 30-spline, Standard Rotation, GM 8.5 in., GM 8.6 in., Set

Part Number: MGR-GM10-411A

4.67 out of 5 stars ( 6 )

Estimated Ship Date: Monday 1/19/2026

• Free Shipping

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

Part Number: MGR-R10RMK

4.29 out of 5 stars ( 17 )

Estimated Ship Date: Monday 1/19/2026

• Free Shipping

Gear, Ring and Pinion, EXCel, 3.73:1 Ratio, GM, 8.5/8.6 in., 10-Bolt, Set

Part Number: RMG-GM85373

4.17 out of 5 stars ( 12 )

Estimated Ship Date: Monday 1/19/2026

• Free Shipping

Locking Hubs, Manual, Supreme, Stainless Steel, Polished, Chevy, Dodge, Ford, GMC, Jeep, Plymouth, Pair

Part Number: MMK-104

4.76 out of 5 stars ( 58 )

Estimated Ship Date: Monday 1/19/2026

• Free Shipping

Automatic Transmission Kickdown Cable, Hi-Tech, Natural Braided Stainless Steel, Natural Aluminum Fittings, GM, TH350, Kit

Part Number: LOK-KD-2350HT

4.89 out of 5 stars ( 38 )

Estimated Ship Date: Monday 1/19/2026

• Free Shipping

Ring and Pinion Gears, 3.42:1 Ratio, 30-spline, Standard Rotation, GM 8.5 in., GM 8.6 in., Set

Part Number: MGR-GM10-342A

4.5 out of 5 stars ( 16 )

Estimated Ship Date: Monday 1/19/2026

• Free Shipping

Clutch Kit, Organic, 1-1/8 in. Shaft, 10-Spline, 11 in. Diameter Disc, GM, Chevy, Kit

Part Number: SUM-700802

4.89 out of 5 stars ( 18 )

Estimated Ship Date: Monday 1/19/2026

• Free Shipping

Automatic Transmission Kickdown Cable, Hi-Tech, Natural Braided Stainless Steel, Natural Aluminum Fittings, GM, TH400, Kit

Part Number: LOK-KD2400HT

4.63 out of 5 stars ( 19 )

Estimated Ship Date: Monday 1/19/2026

• Free Shipping

Transmission Dipstick, Braided Stainless Steel Housing, Black Handle, GM, TH350, TH400, Each

Part Number: LOK-XTD3350400FM

4.89 out of 5 stars ( 18 )

Estimated Ship Date: Monday 1/19/2026

• Free Shipping

Clutch Kit, Organic, 1.125 in.- 10-Spline, 11 in. Disc, Organic, Buick, Chevy, GMC, Oldsmobile, Pontiac, Kit

Part Number: ZZZ-MU5505-1

4.49 out of 5 stars ( 39 )

Estimated Ship Date: Monday 1/19/2026

• Free Shipping

Locking Hubs, Manual, Standard, Aluminum, Chrome, Polished Dial, Chevy, Dodge, Ford, International, Jeep, Pair

Part Number: WRN-9790

4.66 out of 5 stars ( 29 )

Estimated Ship Date: Monday 1/19/2026

Transmission Pan, Stock, Aluminum, EDP Coated Black, GM TH350, Each

Part Number: MRG-9795BMRG

4.6 out of 5 stars ( 5 )

Estimated Ship Date: Monday 1/19/2026

• Free Shipping

Gear, Ring and Pinion, EXCel, 3.42:1 Ratio, GM, 8.5/8.6 in., 10-Bolt, Set

Part Number: RMG-GM85342

4.4 out of 5 stars ( 5 )

Estimated Ship Date: Monday 1/19/2026

• Free Shipping

Ring and Pinion Gears, 4.56:1 Ratio, 30-spline, Standard Rotation, GM 8.5 in., GM 8.6 in., Set

Part Number: MGR-GM10-456A

4.46 out of 5 stars ( 13 )

Estimated Ship Date: Monday 1/19/2026

• Free Shipping

Driveshaft Pinion Yoke; Competition Yoke; 30 Spline; 1310 Series; Cast; Strap

Part Number: MGR-MG1310-1210

4.8 out of 5 stars ( 20 )

Estimated Ship Date: Monday 1/19/2026

• Free Shipping

Transmission Dipstick, Braided Stainless Steel, Natural, Firewall Mount, TH350, TH400, Each

Part Number: LOK-TD350400FM36

4.79 out of 5 stars ( 38 )

Estimated Ship Date: Monday 1/19/2026

• Free Shipping

Throwout Bearing, Hydraulic, 1.375 in. Retainer Diameter, Lever Style Clutch, universal, Each

Part Number: RAM-78125HD

4.58 out of 5 stars ( 26 )

Estimated Ship Date: Monday 1/19/2026

• Free Shipping

Flexplate; Performance, Neutral Balance, 168 Tooth, Chevy, V8, Each

Part Number: HAY-10-010

4.5 out of 5 stars ( 12 )

Estimated Ship Date: Monday 1/19/2026

• Free Shipping

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: Monday 1/19/2026

• Free Shipping

Clutch Kit, 1.125 in. - 10-spline, Organic Disc, Pressure Plate, Chevy, GMC, Kit

Part Number: LUK-04-902

4.88 out of 5 stars ( 16 )

Estimated Ship Date: Monday 1/19/2026

• Free Shipping