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.

Quality Brand-Name Parts Ready to Ship TODAY!

Brand Name Differential Parts

New Products and Specials

Get Cash Back on EATON Differentials

Eaton Performance Payout Rebate 2017

EATON Performance Payout is back! Buy a Detroit Locker, Truetrac, ELocker or Posi and get a $50 Rebate. Offer expires March 31, 2017.  Read more……..

Wavetrac Differentials – Designed & Manufactured in the USA

Wavetrac Helical High Performance Differential Limited Slip Posi

Wavetrac® Differentials use a patented design to improve grip in low traction conditions. The Wavetrac® differential will perform a lifetime of service without maintenance or rebuilds. Designed & manufactured in the US, they come with a transferrable Limited Lifetime Warranty. Read more……

New 35 & 40 Spline ARB Air Lockers for GM 10.5 / 14-Bolt

ARB Air Locker 35 Spline 40 Spline

These Air Lockers are for the enthusiast who demands the best equipment for their vehicle or buggy.The RD234 and RD235 incorporate the latest 2-piece Air Locker design and includes forged gears and a five year, unlimited mileage warranty. Read more…

New ELocker4 for Dana 60 & 70

Stronger, Faster, Smoother. The New ELocker4 features a stronger four-pinion design for increased strength and lightning-fast engagement. Available for 30, 35 and 40 spline axles. Read more…

Ford 10.5″ Super-Duty Gear Options

Ford 10.5" ring pinion gears ratio

The popular 2011-2015 Ford Super-Duty has a Ford 10.5″ differential with a 37-spline pinion. In addition to the OEM ring & pinion options we carry, we also have affordable aftermarket gear sets in 3.55, 3.73, 4.11 and 4.30 ratios. Call for details.

2015+ Mustang Differential Parts

2015 Mustang Ring & Pinion Posi Limited Slip

Ford Racing is first to market with Differential Parts for the 2015+ Mustang GT, and West Coast Differentials has got them in stock! We’ve got Ring & Pinion Gears, Install Kits and two different limited-slip units for the redesigned 8.8″ IRS center section. Read more…..

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

West Coast Differentials Ring Pinion Axles Rearend Parts Click the thumbnail above to view or download our current catalog.