1973 USA Standard Gear Parts and Accessories

Transfer Case Rebuild Kit, New Process 205, GM/Dodge Direct Mount, Kit

Part Number: SPZ-78653

4.33 out of 5 stars ( 3 )

Estimated Ship Date: Monday 1/19/2026

• Free Shipping

Gear, Ring and Pinion, 3.55:1, Chrysler, 8.75 in. 742, Set

Part Number: SPZ-36300

4.0 out of 5 stars ( 2 )

Estimated Ship Date: Monday 1/19/2026

• Free Shipping

Ring and Pinion Gear, 4.11:1 Ratio, GM, 8.5 in./8.6 in., Rear, Set

Part Number: SPZ-36216

Not Yet Reviewed

Estimated Ship Date: Monday 1/19/2026

• Free Shipping

Ring and Pinion Gear, 3.73:1 Ratio, GM, 8.5 in./8.6 in., Rear, Set

Part Number: SPZ-36214

4.5 out of 5 stars ( 6 )

Estimated Ship Date: Monday 1/19/2026

• Free Shipping

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

Part Number: SPZ-36218

Not Yet Reviewed

Estimated Ship Date: Monday 1/19/2026

• Free Shipping

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: Monday 1/19/2026

• Free Shipping

Differential Carrier, Spartan Helical Gear Limited Slip, Dana 30, Front, 27 Spline, 3.73 and Up Ratio, Each

Part Number: SPZ-10383

Not Yet Reviewed

Estimated Ship Date: Monday 1/19/2026

• Free Shipping

Ring and Pinion Gear Installation Kits, Master Overhaul Kits, 10-bolt, 31-spline, Standard Ring Gear Rotation, Dana 44, Front, Chevy, Dodge, Ford, Kit

Part Number: SPZ-37008

Not Yet Reviewed

Estimated Ship Date: Monday 1/19/2026

• Free Shipping

USA Standard Master Overhaul kit Dana 60, Front, Kit

Part Number: SPZ-37020

Not Yet Reviewed

Estimated Ship Date: Monday 1/19/2026

• Free Shipping

Ring and Pinion Gear Installation Kits, Master Overhaul Kits, 30-spline, GM 8.875 in. (12-bolt) Truck, Rear, Chevrolet, GMC, Kit

Part Number: SPZ-37043

Not Yet Reviewed

Estimated Ship Date: Monday 1/19/2026

• Free Shipping

Transfer Case Rebuild Kit, Bearing Kit, New Process 203, GM/Dodge, Kit

Part Number: SPZ-76163

2.5 out of 5 stars ( 2 )

Estimated Ship Date: Monday 1/19/2026

• Free Shipping

Differential Carrier, Spartan Locker, 30-spline, Steel, Rear, GM 8.875 in., Each

Part Number: SPZ-17032

4.0 out of 5 stars ( 4 )

Estimated Ship Date: Monday 1/19/2026

• Free Shipping

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

Not Yet Reviewed

Estimated Ship Date: Monday 1/19/2026

• Free Shipping

Differential Carrier, Power Lok, Positraction, Smooth Design, Chrysler 8.75 in., Rear, Steel, 41, 42, 89 Housings, Chrysler, Plymouth, Dodge, Each

Part Number: SPZ-59027

Not Yet Reviewed

Estimated Ship Date: Feb 2, 2026 if ordered today

• Drop Ship
• Free Shipping
• Special Order

USA Standard Master Overhaul kit GM 8.5 in., Rear, Kit

Part Number: SPZ-37057

4.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 1/19/2026

• Free Shipping

Transfer Case Rebuild Kit, New Process 205, Dodge, Ford, Remote Mount, Kit

Part Number: SPZ-70414

Not Yet Reviewed

Estimated Ship Date: Monday 1/19/2026

• Free Shipping

Differential Carrier Rebuild Kits and Spider Gears, Spider Gear Sets, GM 8.875 in. (12-bolt), Car/Truck, 30-spline, Buick, Chevy, GMC, Pontiac, Kit

Part Number: SPZ-39021

5.0 out of 5 stars ( 3 )

Estimated Ship Date: Monday 1/19/2026

• Free Shipping

Ring and Pinion Gears, 4.11:1 Ratio, 26-spline, Standard Ring Gear Rotation, Dana 44, Set

Part Number: SPZ-36041

Not Yet Reviewed

Estimated Ship Date: Monday 1/19/2026

• Free Shipping

Transfer Case Rebuild Kit, Bearing and Seal Kit, Dana 20 with Cast Iron Case, 30mm I.D. Front Output Bearing, Chevy, Jeep, Dana 20, Kit

Part Number: SPZ-78297

3.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 1/19/2026

• Free Shipping

Ring and Pinion Gears, 3.54:1 Ratio, 29-spline, Standard Ring Gear Rotation, Dana 70, Set

Part Number: SPZ-36087

Not Yet Reviewed

Estimated Ship Date: Feb 2, 2026 if ordered today

• Drop Ship
• Free Shipping
• Special Order

Axle Shaft, 28-Spline, 30.125 in. Length, Rear, Chevy, Pontiac, Each

Part Number: SPZ-35050

Not Yet Reviewed

Estimated Ship Date: Monday 1/19/2026

• Free Shipping

Axle Shaft, 30-Spline, 30.125 in. Length, Rear, Chevy, GMC, Each

Part Number: SPZ-35058

Not Yet Reviewed

Estimated Ship Date: Monday 1/19/2026

• Free Shipping

USA Standard Master Overhaul kit for the Chrysler 9.25" rear differential.

Part Number: SPZ-37002

Not Yet Reviewed

Estimated Ship Date: Monday 1/19/2026

• Free Shipping

USA Standard Master Overhaul kit Dana 44 differential, 30 spline, rear axle

Part Number: SPZ-37015

Not Yet Reviewed

Estimated Ship Date: Feb 2, 2026 if ordered today

• Drop Ship
• Free Shipping
• Special Order

Ring and Pinion Gears, 3.73:1 Ratio, 26-spline, Standard Ring Gear Rotation, Dana 30, Set

Part Number: SPZ-36024

Not Yet Reviewed

Estimated Ship Date: Feb 2, 2026 if ordered today

• Drop Ship
• Free Shipping
• Special Order