USA Standard Gear Ring & Pinion Gears, Axles, Driveshafts & More

USA Standard Gear uses precision machining and vigorous testing methods to produce a large assortment of world-class gearing and axle products, ranging from axle shafts...

USA Standard Gear uses precision machining and vigorous testing methods to produce a large assortment of world-class gearing and axle products, ranging from axle shafts to lockers. Summit Racing is your go-to source for USA Standard Gear parts. We carry USA Standard Spartan lockers, ring and pinion sets, axle shafts, replacement cross pins, front axle stubs, and more. Get the traction you need from the parts you want. Order your USA Standard Gear parts from Summit Racing today!

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USA Standard Gear Master Overhaul Kits ZK GM8.6

Ring and Pinion Installation Kit, GM 8.6 in., Rear, Kit

Part Number: SPZ-37059

4.8 out of 5 stars ( 5 )

Estimated Ship Date: Monday 11/10/2025

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Estimated Ship Date: Monday 11/10/2025

USA Standard Gear Manual Transmission Cases ZMG56-CASE-HD

G56 Manual Transmission Case 05-18 Dodge Ram 5.8/6.7-L Diesel

Part Number: SPZ-12325

Not Yet Reviewed

Estimated Ship Date: Nov 24, 2025 if ordered today

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Estimated Ship Date: Nov 24, 2025 if ordered today

USA Standard Gear Spider Gear Sets for 2011-2018 1500, 2010 RAM 1500 - ZIKC9.25B-S-31B

Differential Carrier Rebuild Kits and Spider Gears, Chrysler 9.25 in. ZF, Side Gears, 31-spline, Rear Axle Location, Dodge, Ram, Kit

Part Number: SPZ-39034

Not Yet Reviewed

Estimated Ship Date: Monday 11/10/2025

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Estimated Ship Date: Monday 11/10/2025

USA Standard Gear Ring and Pinion Sets ZG GM8.5-373 GM 8.5/8.6 in. 3.73 Gears

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 11/10/2025

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Estimated Ship Date: Monday 11/10/2025

USA Standard Gear Axle Shafts ZA G8.2BOP-L

Axle Shaft, 28-spline, 29.875 in. Length, Rear, GM 8.2 in., BOP Axle, Pontiac, Each

Part Number: SPZ-35060

4.83 out of 5 stars ( 6 )

Estimated Ship Date: Monday 11/10/2025

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Estimated Ship Date: Monday 11/10/2025

USA Standard Gear Master Overhaul Kits ZK GM12T

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 11/10/2025

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Estimated Ship Date: Monday 11/10/2025

USA Standard Gear Ring and Pinion Sets ZG C8.42-355-C Chrysler 8.75 in. 742 case 3.55 Gears

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 11/10/2025

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Estimated Ship Date: Monday 11/10/2025

USA Standard Gear Transfer Case Bearing Kits ZTBK205GDM

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 11/10/2025

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Estimated Ship Date: Monday 11/10/2025

USA Standard Gear Transfer Case Bearing Kits ZTBK208

Transfer Case Rebuild Kit, Bearing Kit, New Process 208, Chevrolet, Plymouth, Jeep, Dodge, Ford, GMC, Kit

Part Number: SPZ-77915

3.86 out of 5 stars ( 7 )

Estimated Ship Date: Monday 11/10/2025

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Estimated Ship Date: Monday 11/10/2025

USA Standard Gear Spartan Lockers Dana 30 SL D30-27

Spartan Differential Locker, Dana 30, 27-spline Axle, Jeep, Ford, International, Each

Part Number: SPZ-17000

5.0 out of 5 stars ( 5 )

Estimated Ship Date: Monday 11/10/2025

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Estimated Ship Date: Monday 11/10/2025

USA Standard Gear Transfer Case Bearing Kits ZTBK205GDM4

Transfer Case Rebuild Kit, Bearing Kit, New Process 205, 32 Spline Input Shaft, Chevrolet, GMC, Kit

Part Number: SPZ-79317

4.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 11/10/2025

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Estimated Ship Date: Monday 11/10/2025

USA Standard Gear Ring and Pinion Sets ZG F8.8-430 Ford 8.8 in. 4.30 Gears

RING AND PINION GEARS, USA Standard ring & pinion sets

Part Number: SPZ-36329

Not Yet Reviewed

Estimated Ship Date: Monday 11/10/2025

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Estimated Ship Date: Monday 11/10/2025

USA Standard Gear Master Overhaul Kits ZK F8.8

Ring and Pinion Installation Kit, Ford 8.8 in., Rear, Kit

Part Number: SPZ-37030

Not Yet Reviewed

Estimated Ship Date: Monday 11/10/2025

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Estimated Ship Date: Monday 11/10/2025

USA Standard Gear Master Overhaul Kits ZK F9-A

USA Standard Master Overhaul kit for the Ford 9" LM102910 differential

Part Number: SPZ-37033

3.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 11/10/2025

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Estimated Ship Date: Monday 11/10/2025

USA Standard Gear Ring and Pinion Sets ZG D60-354 Dana 60 3.54 Gears

Ring and Pinion Gears, 3.54:1 Ratio, 29-spline, Standard Ring Gear Rotation, Dana 60, Set

Part Number: SPZ-36073

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 11/10/2025

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Estimated Ship Date: Monday 11/10/2025

USA Standard Gear Master Overhaul Kits ZK D80-B

USA Standard Master Overhaul kit Dana 80, Rear, Kit

Part Number: SPZ-37078

Not Yet Reviewed

Estimated Ship Date: Monday 11/10/2025

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Estimated Ship Date: Monday 11/10/2025

USA Standard Gear Transfer Case Bearing Kits ZTBK300A

Bearing Kit, Transfer Case, Dana 300, Jeep, Kit

Part Number: SPZ-75160

4.0 out of 5 stars ( 8 )

Estimated Ship Date: Monday 11/10/2025

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Estimated Ship Date: Monday 11/10/2025

USA Standard Gear Transfer Case Bearing Kits ZTBK203G

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 11/10/2025

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Estimated Ship Date: Monday 11/10/2025

USA Standard Gear Ring and Pinion Sets ZG D44HD-373 Dana 44-HD 3.73 Gears

USA Standard Ring & Pinion gear set for Dana 44-HD in a 3.73 ratio

Part Number: SPZ-36057

Not Yet Reviewed

Estimated Ship Date: Nov 24, 2025 if ordered today

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Estimated Ship Date: Nov 24, 2025 if ordered today

USA Standard Gear Manual Transmission Throwout Bearing Retainers ZMG56-6C

Manual Transmission Bearing Retainer, Manual Transmission Bearing Retainer

Part Number: SPZ-ZMG56-6C

Not Yet Reviewed

Estimated Ship Date: Monday 11/10/2025

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Estimated Ship Date: Monday 11/10/2025

USA Standard Gear Master Overhaul Kits ZK D60-R

Ring and Pinion Gear Installation Kits, Master Overhaul Kits, 29-spline, Dana 60, Rear, Chevrolet, Dodge, Ford, GMC, Jeep, Plymouth, Kit

Part Number: SPZ-37021

Not Yet Reviewed

Estimated Ship Date: Monday 11/10/2025

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Estimated Ship Date: Monday 11/10/2025

USA Standard Gear Transfer Case Bearing Kits ZTBK205FDM

Transfer Case Rebuild Kit, Bearing Kit, New Process 205, Ford, Kit

Part Number: SPZ-75723

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 11/10/2025

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Estimated Ship Date: Monday 11/10/2025

USA Standard Gear Spider Gear Sets ZIKGM12-S-30

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 ( 2 )

Estimated Ship Date: Monday 11/10/2025

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Estimated Ship Date: Monday 11/10/2025

USA Standard Gear Ring and Pinion Sets ZG GM8.5-411 GM 8.5/8.6 in. 4.11 Gears

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 11/10/2025

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Estimated Ship Date: Monday 11/10/2025

USA Standard Gear Manual Transmission Bearing Kits for 1997-2007 CORVETTE - ZMBK396AWS

Manual Transmission Rebuild Kits , T56 M/T BEARING KIT '97&UP GM CORVETTE 6SPD W/SYNCHROS

Part Number: SPZ-74058

Not Yet Reviewed

Estimated Ship Date: Nov 24, 2025 if ordered today

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Estimated Ship Date: Nov 24, 2025 if ordered today

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