Quality Differential Parts since 1982!


Limited Slip Differentials

West Coast Differentials stocks a wide selection of Limited Slip Differentials for many applications. To find a limited-slip for a specific vehicle, go to our Limited-Slip Application Guide or call our staff of differential experts at (800) 510-0950 for LIVE assistance.

Auburn Gear Limited Slip Differential

Auburn Gear Limited Slip Differentials

The Auburn Gear Limited Slip Differential employs an integral cone clutch side gear unit that creates friction with the carrier to drive both tires. The clutches will slip when one tire turns faster than the other. These are reasonably aggressive units that come in a High Performance and Pro version. The Pro version has more aggressive preload. Auburn also offers a D-Rex program to replace the unit should the clutches wear out.
Read more about Auburn Gear Limited-Slip

Eaton Limited Slip Differential

Eaton Limited Slip Differentials

The Eaton Limited Slip Differential uses carbon disc clutch packs, preloaded by a central spring assembly behind each differential side gear. When torque input increases the clamping load on the clutch packs increases so that the chatter-free clutch packs grab and transfer power to both wheels. Muscle cars, hot rods and light duty off road vehicles should look to Eaton’s Limited Slip Differential for more rear end traction.
Read more about the Eaton Posi

Eaton Detroit Truetrac

Eaton Truetrac

The Eaton Truetrac’s proven helical gear design eliminates the need for wearable parts, resulting in maintenance free traction recognized not only for its toughness, but its smooth and quiet operation as well. The unit performs like an open differential and uses friction between worm gears and the carrier to provide smooth power transfer to the tire with the most traction.
Read more about the Eaton Truetrac

 Trac Lok Limited Slip Differential

Trac Lok Limited Slip Differentials

Trac Lok Limited Slip Differentials are made by a number of OEM and aftermarket manufacturers. These units use fiber clutches behind the side gears to apply torque to both tires. They allow axle slip to varying degrees depending on the unit. Trac Loks are a reasonably priced option for added rear end traction.

Auburn HP_Auburn PRO_Eaton Posi_OEM_Powr Lok_Trac Lok_Truetrac


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Traction Devices

AAM Differential Kit

Open Differentials vs. Locking and Limited-Slip Differentials

Open differentials are standard equipment on most vehicles. The "Open" differential does a great job of transmitting power and propelling the vehicle forward. The design also allows both wheels to travel at different speeds while cornering, without causing excessive tire wear. The problem with the open differential happens when one tire is on a low traction surface such as ice, snow or mud. The tire on the slippery surface will spin while the other tire provides no forward motion. The animation above shows an open front differential in a 4-wheel drive vehicle. Differential upgrades that will provide power to both wheels are featured on this page.

2015 Product Catalog

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