Availability
1981 CHEVROLET K20 Transmission & Drivetrain
Differential Ring and Pinion, Differential Ring and Pinon Front and Rear Complete Kit
Part Number: MGR-MGK-208
Not Yet Reviewed
Estimated Ship Date: Mar 13, 2026 if ordered today
Estimated Ship Date: Mar 13, 2026 if ordered today
14T 10.5" GM P/G T/W
Part Number: YGA-33384
Not Yet Reviewed
Estimated Ship Date: Mar 25, 2026 if ordered today
Estimated Ship Date: Mar 25, 2026 if ordered today
14T 10.5" GM STD X/PIN SHAFT, CROSS TYPE FOR 4 PIN DESIGN
Part Number: YGA-33405
Estimated Ship Date: Mar 25, 2026 if ordered today
Estimated Ship Date: Mar 25, 2026 if ordered today
Spool, Mini, 30-spline, Steel, GM 10.5 in. (14-bolt), Each
Part Number: YGA-32301
Not Yet Reviewed
Estimated Ship Date: Mar 25, 2026 if ordered today
Estimated Ship Date: Mar 25, 2026 if ordered today
Cross Pin, GM, 14-Bolt, 10.5 in. Each
Part Number: MGR-3663696
Not Yet Reviewed
Estimated Ship Date: Mar 13, 2026 if ordered today
Estimated Ship Date: Mar 13, 2026 if ordered today
Pinion Shims, Steel, GM, 10.5 in., Kit
Part Number: MGR-GM14SK
Not Yet Reviewed
Estimated Ship Date: Mar 13, 2026 if ordered today
Estimated Ship Date: Mar 13, 2026 if ordered today
Differential Pinion Shaft, Differential Pinion Shaft
Part Number: PWT-3991018RDY
Not Yet Reviewed
Estimated Ship Date: Apr 13, 2026 if ordered today
Estimated Ship Date: Apr 13, 2026 if ordered today
Pinion Shaft, SHAFT, SHORT, RDZ, 3991055
Part Number: PWT-3991055RDZ
Not Yet Reviewed
Estimated Ship Date: Apr 13, 2026 if ordered today
Estimated Ship Date: Apr 13, 2026 if ordered today
GAUGE RING
Part Number: PWT-4211005
Not Yet Reviewed
Estimated Ship Date: Apr 13, 2026 if ordered today
Estimated Ship Date: Apr 13, 2026 if ordered today
SLOTTED DRIVER
Part Number: PWT-424003DGE2
Not Yet Reviewed
Estimated Ship Date: Apr 13, 2026 if ordered today
Estimated Ship Date: Apr 13, 2026 if ordered today
CROSS SHAFT 9.5 GM 14 BLT
Part Number: MGR-14012700
Not Yet Reviewed
Estimated Ship Date: Mar 13, 2026 if ordered today
Estimated Ship Date: Mar 13, 2026 if ordered today
Ring Gear Fasteners, Replacement Bolt, Hex Head, Steel, Black Oxide, 1/2-20 in. RH, GM, 10.5 in., 14 Bolt, 4.56 and Up Carrier, Each
Part Number: MGR-331421
Not Yet Reviewed
Estimated Ship Date: Mar 13, 2026 if ordered today
Estimated Ship Date: Mar 13, 2026 if ordered today
Pin, PIN, STOP, PAB, 1038-421
Part Number: PWT-1038421PAB
Not Yet Reviewed
Estimated Ship Date: Apr 13, 2026 if ordered today
Estimated Ship Date: Apr 13, 2026 if ordered today
Spring, SPRING, OUTER, ZAG, 1038-461
Part Number: PWT-1038461ZAG
Not Yet Reviewed
Estimated Ship Date: Apr 13, 2026 if ordered today
Estimated Ship Date: Apr 13, 2026 if ordered today
DRIVER
Part Number: PWT-424005DFR2
Not Yet Reviewed
Estimated Ship Date: Apr 13, 2026 if ordered today
Estimated Ship Date: Apr 13, 2026 if ordered today
COUPLER
Part Number: PWT-5201001CJR
Not Yet Reviewed
Estimated Ship Date: Apr 13, 2026 if ordered today
Estimated Ship Date: Apr 13, 2026 if ordered today
COUPLER
Part Number: PWT-5201004CJY
Not Yet Reviewed
Estimated Ship Date: Apr 13, 2026 if ordered today
Estimated Ship Date: Apr 13, 2026 if ordered today
COUPLER
Part Number: PWT-5201007CJU
Not Yet Reviewed
Estimated Ship Date: Apr 13, 2026 if ordered today
Estimated Ship Date: Apr 13, 2026 if ordered today
COUPLER
Part Number: PWT-5201012CGM
Not Yet Reviewed
Estimated Ship Date: Apr 13, 2026 if ordered today
Estimated Ship Date: Apr 13, 2026 if ordered today
Differential Spool Bearing Kit; Fits GM 8.5 in. 10 Bolt; Incl. Bearings/Bearing Races
Part Number: RMG-29-0013-1
Estimated Ship Date: Mar 13, 2026 if ordered today
Estimated Ship Date: Mar 13, 2026 if ordered today
Gear, Ring and Pinion, EXCel, 4.56:1 Ratio, GM, 8.875 in., 12-Bolt Truck, Set
Part Number: RMG-12BT456
Estimated Ship Date: Mar 13, 2026 if ordered today
Estimated Ship Date: Mar 13, 2026 if ordered today
Ring and Pinion Installation Kit, Basic, GM 8.875 in. 12-Bolt, Rear, Kit
Part Number: MGR-R12RT
Not Yet Reviewed
Estimated Ship Date: Mar 13, 2026 if ordered today
Estimated Ship Date: Mar 13, 2026 if ordered today
Ring and Pinion Installation Kit, Super Kit, GM, 8.5 in., Kit
Part Number: MGR-R10RASKT
Not Yet Reviewed
Estimated Ship Date: Mar 13, 2026 if ordered today
Estimated Ship Date: Mar 13, 2026 if ordered today
Ring and Pinion Installation Kit, Basic, GM 8.5 in., Front/Rear, Kit
Part Number: MGR-R10RET
Estimated Ship Date: Mar 13, 2026 if ordered today
Estimated Ship Date: Mar 13, 2026 if ordered today
Ring and Pinion Installation Kit, Basic, GM 8.5 in., Front/Rear, Kit
Part Number: MGR-R10RT
Estimated Ship Date: Mar 13, 2026 if ordered today
Estimated Ship Date: Mar 13, 2026 if ordered today
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