USA Standard Gear

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USA Standard Gear

Differential & Traction
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USA Standard Gear

drive shafts
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USA Standard Gear

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USA Standard Gear

Manual Transmission Components
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USA Standard Gear

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USA Standard Gear

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Built for the Bold

Whether you're replacing a worn-out OE axle or building your rig from the ground up, we have your back with performance that won't quit.

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USA Standard Gear

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install kits

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USA Standard Gear

oe replacement ring & pinions

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oe replacement power steering boxes

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Shop Our Top Picks

Spartan Helical LSD Worm Gear Limited Slip Differential, Dana 30 Front 27 Spline
Spartan Helical LSD Worm Gear Limited Slip Differential, Dana 30 Front 27 Spline
$577.89
Spartan Locker for Chrysler 8.25", 29 Spline, with Heavy-Duty Cross Pin Shaft
Spartan Locker for Chrysler 8.25", 29 Spline, with Heavy-Duty Cross Pin Shaft
$794.89
USA Standard Bearing kit for '98 & up 10.5" GM 14 bolt truck
USA Standard Bearing kit for '98 & up 10.5" GM 14 bolt truck
$334.89
Spartan Locker for Ford 8.8", 31 spline, includes 7/8" cross pin shaft
Spartan Locker for Ford 8.8", 31 spline, includes 7/8" cross pin shaft
$660.89
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USA Standard Ring & Pinion gear set for Chrysler 9.25" front in a 4.88 ratio
USA Standard Ring & Pinion gear set for Chrysler 9.25" front in a 4.88 ratio
$526.89
USA Standard Ring & Pinion gear set for '10 & down Chrysler 9.25", 3.90 ratio
USA Standard Ring & Pinion gear set for '10 & down Chrysler 9.25", 3.90 ratio
$475.89
USA Standard replacement Ring & Pinion gear set for Dana 44 in a 3.08 ratio
USA Standard replacement Ring & Pinion gear set for Dana 44 in a 3.08 ratio
$320.89
USA Standard Rear Replacement Ring & Pinion Jeep JK D44 4.11 Ratio
USA Standard Rear Replacement Ring & Pinion Jeep JK D44 4.11 Ratio
$333.89
USA Standard Bearing kit for '97-'98 Ford 9.75
USA Standard Bearing kit for '97-'98 Ford 9.75
$391.89
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11.25" Dana 80 4.11 Rear Ring & Pinion, Install Kit, 35 Spline Posi, 4.125" BRG
11.25" Dana 80 4.11 Rear Ring & Pinion, Install Kit, 35 Spline Posi, 4.125" BRG
$2,381.89
8.8" Ford 3.55 Rear Ring & Pinion, Install Kit, 2.99" OD Axle Bearings & Seals
8.8" Ford 3.55 Rear Ring & Pinion, Install Kit, 2.99" OD Axle Bearings & Seals
$634.89
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7.5" GM 3.23 Rear Ring & Pinion, Install Kit, 26spl Posi, 2.25" Axle Bearings
7.5" GM 3.23 Rear Ring & Pinion, Install Kit, 26spl Posi, 2.25" Axle Bearings
$1,355.89
USA Standard Gear Rear Driveshaft for Jeep Cherokee, 88” Overall Length
USA Standard Gear Rear Driveshaft for Jeep Cherokee, 88” Overall Length
$697.89
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USA Standard Front Driveshaft Cherokee/Grand Cherokee, 30.5" Center to Center
USA Standard Front Driveshaft Cherokee/Grand Cherokee, 30.5" Center to Center
$543.89
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USA Standard Driveshaft, Jeep Grand Cherokee/Commander, 47.5" Flange to Flange
USA Standard Driveshaft, Jeep Grand Cherokee/Commander, 47.5" Flange to Flange
$705.89
Spartan Locker for Dana 30 Jeep/JL M186 differential with 27 spline axles
Spartan Locker for Dana 30 Jeep/JL M186 differential with 27 spline axles
$623.89

Meet The Spartan Locker

Engineered for superior performance, this limited slip differential ensures optimal traction and control on any terrain. It's the ultimate upgrade for enthusiasts seeking reliability and durability.

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Resources to Keep You Rolling

Calculators Calculators
Calculators

Calculators

Find the perfect gear ratios and specs for peak performance, efficiency, and off-road capability—fast and accurate.

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Install Manuals Install Manuals
Install Manuals

Install Manuals

Get the job done right with our step-by-step, detailed instructions for installing & upgrading drivetrain components with confidence.

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Technical FAQs Technical FAQs
Technical FAQs

Technical FAQs

Our FAQs cover common technical topics, helping you troubleshoot, select the right parts, and install with confidence.

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