Our Service Department, Ring & Pinion Service is currently CLOSED to any new business.
The warranty for all previous work will be honored for the normal 6-month period from date of service.
If you have a warranty issue, please reach out to us via email using the “Contact Us” form, email to info@differentials.com or by phone at (800)787-8012
Contact Us
For any inquiries, please fill out the form below.

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.