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We are experiencing above average demand, supplier shortages and delivery delays.
We apologize for any inconvenience, and are doing our best to get your order fulfilled and delivered in a timely fashion.
Let us take the guesswork out of your job.
Simply give us a call.
Our live parts specialists are here
to make sure you get the right parts the first time.
Differentials are our business.
What We Do
Accurate Differential Identification is the first and most important step in your differential repair, upgrade or overhaul project.
Differential Parts Catalog
See the parts that are available for your vehicle, with direct links to our most current parts catalog.
Tech Topics include everything from Differential Identification to Installation Instructions and New Gear Break-In Procedure.
Brands We Carry
We continuously search the marketplace to offer the highest quality and most popular differential parts at competitive prices.
Featured Products and Specials
Before you purchase parts…
Please read this before you buy parts from us. At West Coast Differentials we have always supported our wholesale customers by ...Read More
Isotropic Superfinishing – Ring & Pinion Gear Polishing
In-House Gear Finishing Service Simply put, Isotropic Superfinishing significantly reduces the surface imperfections that remain after a Ring and Pinion Gear ...Read More
Truetrac for Mustang – 2015+ S550 Available NOW
The NEW Truetrac for Mustang is HERE!Read More
Truetrac for RAM 1500 – 2011+ Available NOW!
The NEW Truetrac for 2011+ Ram 1500 9.25 ZF is AVAILABLE NOW!Read More
Complete Third Members – Built to Your Specs
From stock replacement to full-on race applications, we build complete ready-to run third members for Ford 8″, 9″, Chrysler 8.75″ and ...Read More
Wavetrac Differentials – Made in USA
Wavetrac Differentials use a patented design to improve grip in low traction conditions. The Wavetrac® differential will perform a lifetime of service ...Read More
New 35 & 40 Spline ARB Air Lockers for GM 10.5 / 14-Bolt
These Air Lockers are for the enthusiast who demands the best equipment for their vehicle or buggy. The RD234 and RD235 ...Read More
NEW Direct-Acting Dana 60/70 ELocker
Direct Acting ELocker for Dana 60™ and Dana 70™ – Stronger, Faster, Smoother. Available for 30, 35 and 40 spline axles. ...Read More
2015+ Mustang Differential Parts
Ford Racing is first to market with Differential Parts for the 2015+ Mustang GT, and West Coast Differentials has got them ...Read More
We Stock Differential Parts for Nissan!
Our selection of differential parts for Nissan vehicles is growing! We’ve got Ring & Pinion Gears, Install & Repair Kits, Locking ...Read More
New from Auburn Gear! Chrysler 9.25″ ZF Posi
Looking for more traction for your 2010 and newer Ram 1500, Dodge Durango or Jeep Grand Cherokee? Check out Auburn’s new ...Read More
ARB Air Locker Traction Pack
The ARB Air Locker Traction Pack for Jeep JK Wrangler is here! Get two ARB Air Lockers, an ARB Air Compressor ...Read More
ARB Differential Covers
ARB’s nodular iron Differential Covers have been engineered to protect the differential and ring & pinion from off-road hazards. Features: Computer ...Read More
Ring & Pinion Gear Break In Procedure
In addition to proper differential setup, the correct break-in procedure is an important part of ensuring the long life of your gears. ...Read More
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 ...Read More
Quality Branded Parts Ready to Ship!
“The used truck I bought had a lot of scratches and scrapes in the bed and on the tailgate. I considered a drop in bedliner but I was concerned with the fit and finish. After talking to a couple of friends and…”