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.From stock replacement to full-on race applications, we build complete ready-to run third members for Ford 8″, 9″, Chrysler 8.75″ and Toyota. 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 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
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 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 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…..
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 Differentials and Positraction Units for a variety of applications. Call our Sales Department for more information or check out our Application Guide for Nissan.
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 High Performance Series Limited-Slip Differential for Chrysler 9.25″ “ZF”. Get the details here including application information.
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 and tire inflation accessories at a savings of $299.00 over purchasing the items separately. See more details about the ARB Traction Pack
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 optimized cross brace design increases the structural rigidity of the whole axle
- Additional housing strength helps keep the ring & pinion gears meshing on the flat faces of the teeth, greatly increasing ring & pinion life and overall maximum load strength
- Top quality, high power neodymium magnets are used in both the drain plug and the dipstick to collect metallic wear particles
- Magnet location in the end of the dipstick allows the oil to be checked for tell-tale signs of internal damage
- Prolonged carrier bearing life due to extra support to the bearing alignment
- Approach/departure angle optimized by angled exterior surfaces
- Unique dipstick/filler cap design allows differential oil level to be adjusted for customized high driveline angles
Available for:
- Dana 35
- Dana 44 (except Aluminum)
- Dana 50/60
- Chrysler 8.25″
- Ford 8.8″
- GM 10-Bolt
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.
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.
New Gear Break In is an important step. ALL new ring & pinion gear sets must be properly broken in to prevent damage & premature failure.
Improper gear break in procedures may cause overloading and overheating of the ring and pinion gears as well as break down of the gear oil. Failure to properly break-in a new gear set can be identified by inspection, and may void the manufacturer’s warranty.
If you’re replacing the ring & pinion gear set, don’t plan on heading up over that mountain pass or hooking up that heavy trailer just yet….. Following the simple steps outlined below before you head out can prevent potential noise issues or gear damage.
After driving the first 15-20 miles at around 60 mph, it is best to stop and let the differential cool completely. Maintaining a speed below 60 mph and driving conservatively for the first 100 miles is also advised. The gear oil should be changed after 500 miles. We recommend that you drive at least 500 miles before any heavy use or towing. During the first 45 miles of actual towing, only drive 10-15 miles at a time before stopping to let the differential cool.
These steps are necessary to prevent damage to the new ring & pinion gear. Any heavy use or overloading of the differential during the first 500 miles may cause irreparable damage to the gear set.
Again, IMPROPER BREAK-IN CAN BE IDENTIFIED BY INSPECTION AND MAY VOID THE MANUFACTURER’S WARRANTY.
