Quality Differential Parts since 1982!


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Free Technical Support West Coast Differentials offers Free Technical Support before and after you buy differential parts from us. Our differential parts experts will make sure you get the right parts the first time!
Same Day Shipping At West Coast Differentials we think you deserve to have your parts as soon as possible. So most orders placed before 4pm Pacific time ship the same day!
Differential Parts Distributor We have your differential parts in stock ready to ship today. West Coast Differentials stocks a complete line of light duty axle parts for Chevrolet, Chrysler, Dana, Ford, GM, Jeep and Toyota axle assemblies.
We Make the Difference At West Coast Differentials we are committed to making your experience with us totally enjoyable. We think top notch customer service is the most important thing we do. Hence, at West Coast Differentials, We Make the Difference is much more than a slogan.

Category: Featured Differential Parts

New Lower Prices on ARB Air Lockers!

New Low Price ARB Air Locker

Get More for Less. Save on the Trusted Air Locker. $100 average retail price reduction across the entire Air Locker product line.

The Original. The Toughest. Still The Best.

ARB is very excited to announce that, due to manufacturing efficiencies at our plant in Melbourne, Australia, we are able to lower the average retail price on Air Lockers by more than $100 dollars each.   For almost three decades the venerable Air Locker has proven itself to be the strongest, most durable and most reliable selectable locker on the market.   Now it’s an even better value than before.

New ARB Diff Covers

ARB Differential Cover Ford 8.8, Chrysler 8.25, GM 10-Bolt

New ARB Differential Covers for Ford 8.8″, Chrysler 8.25″ and GM 10-Bolt

Since being released in late 2006, the red ARB differential covers can be found on trail and competition vehicles in just about every part of the world. ARB is happy to announce that the ARB differential covers are now available for 3 more axle models; the Ford 8.8″, Chrysler 8.25″ and GM 10-Bolt. Each of these applications will be available in red or black powder coating.




ARB’s Diff Cover will protect your differential against the hazards of impact during competition or extreme off road use and are designed to counteract flexing of the axle assembly When off road, it is inevitable that obstacles will be encountered that could potentially inflict expensive damage on your differential. To prevent this, ARB’s Differential Cover is available for a range of vehicle models, and has been specifically engineered to protect the differential and ring & pinion set from any off road hazards.

  • High tensile nodular iron structure protects the differential and ring & pinion set from off road obstacles
  • Computer optimized cross brace design increases the structural rigidity of the whole axle
  • Approach/departure angle optimized by angled exterior surface
  • Prolonged carrier bearing life due to extra support to the bearing alignment.
  • Top quality, high power neodymium magnets are used in both the drain plug and the dipstick to collect any metallic particles in the oil. This makes the dipstick an easy location to be checked for tell-tale signs of internal damage or water contamination without the need to drain the oil.


Eaton ELocker 4

Check out the new Eaton ELocker 4 for Dana 44 Axles! Features the same push-button convenience of the ELocker with the added strength of a 4-pinion design.

Eaton ELocker4 - Dana 44 4 Pinion E Locker

Eaton Performance – Ford 8.8 Truetrac

Ford 8.8 Truetrac

The Detroit Truetrac for the Ford 8.8”- 33 Spline is ideal for upgrading existing Ford 8.8” axles (1983 – 2011) as well as custom powertrain builds.

Ford 8.8 Truetrac - Eaton Performance Differentials

Ford 9 Detroit Truetrac – 35 Spline 5 Pinion

The Ford 9 Detroit Truetrac 35 Spline is perfect for use in Ford 9″ axle applications that are being upgraded from 28 or 31 spline to 35 spline.

This unit is also ideal for custom powertrain builds. The 5-pinion design of the Ford 9 Detroit Truetrac provides incredible strength, smooth maintenance-free performance and proven durability. Available NOW!! Call the differential experts at West Coast Differentials for more information. Representatives are available to help Monday thru Friday from 8am to 5pm Pacific Standard Time.

Ford 9 Detroit Truetrac

Check out the Detroit Truetrac FAQ’s page for more information.

Application Guides

Differential Parts Application Guide See the parts that are available for your vehicle, with direct links to our current parts catalog.

Tech Topics

Differential Repair-Gear Ratio Calculators-setup specs-installation Instructions

Tech Topics include everything from Differential Identification to Installation Instructions and New Gear Break-In Procedure

eNews & Updates

West Coast Differentials 30 Years

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Order Parts

Our LIVE Differential Parts Experts are ready to take your call Monday thru Friday from 8AM to 5PM.

(800) 510-0950

Most orders received before 4PM Pacific Standard Time will be shipped out the SAME DAY, with next day delivery via ground service to most of the West Coast!

We do not offer Online Ordering We want to make sure you get the right parts... Simply give us a call! Let our parts specialists take the guesswork out of your order.

2015 Product Catalog

Click the thumbnail above to view our current catalog online or Download a PDF copy and save it on your computer for offline viewing