West Coast Differentials has been distributing quality differential and axle parts since 1982. We believe that our exceptional customer service and product knowledge is what sets us apart from the competition. Give us a try, we think you'll be glad you did!
The most current parts and application information can always be found here on our website or by calling one of our differential parts experts. All of the parts we sell are also used every day in our busy service shop. This gives us confidence in the quality of the parts we sell.
Extensive Inventory
We stock a wide selection of ring and pinion gears, installation kits and axle shafts for most applications. We also carry proven quality limited-slip units and locking differentials from top manufacturers.
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!
Free Technical Support
West Coast Differentials offers Free Expert 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!
Let our Experience Work for You! Our LIVE Parts Professionals can Take the Guesswork Out of Your Job.
Differential, Gear and Axle Parts – That’s All We Do. Experience the Difference, Call Today!
Let us take the guesswork out of your gear & axle 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
Featured Works
Essentials
Differential Identification
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.
Technical Help
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 ...
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Isotropic Superfinishing – Ring & Pinion Gear Polishing
In-House Isotropic Superfinishing – Gear Finishing Service Simply put, Isotropic Superfinishing significantly reduces the surface imperfections that remain after a Ring ...
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Truetrac for Mustang – 2015+ S550 Available NOW
The NEW Truetrac for Mustang is HERE! The Truetrac for Mustang is a great choice for anyone who wants smooth and ...
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Truetrac for RAM 1500 – 2011+ Available NOW!
The NEW Truetrac for RAM 1500 Trucks with the 9.25 ZF rear axle is AVAILABLE NOW! The Truetrac for RAM 1500 ...
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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 ...
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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 ...
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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 ...
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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 ...
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Differential Parts for Nissan – In Stock!
Our selection of differential parts for Nissan vehicles is growing! Dealer parts departments want to sell you the entire assembly for ...
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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 ...
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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 ...
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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 ...
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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. ...
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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 ...
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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 ...
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Testimonials
“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…”
