Expertise that Extends Beyond the Transmission

Transtar is known for our transmission expertise, but we also carry rear, front, 4-wheel and all-wheel drive differential rebuild kits, components and accessories from the brands you know and trust.


Transtar has everything you need to complete your next Differential job. When you partner with Transtar, you get a rich blend of quality parts, expertise, and exceptional customer service, with same or next-day delivery.

Differential Overhaul Kits

Transtar's Differential Overhaul Kits include: 
Front and Rear Pinion Bearings, Carrier Bearings, Pinion Nut, Pinion Seal, Crush Sleeve, Gear Marking Compound, and an Application Brush for the Gear Marking Compound. Axle Bearings and Axle seals sold separately specific to application.  Learn More

Ring and Pinion Gears


Maximize driveline performance with premium ring and pinion gears from the industry’s top ring gear and pinion manufacturers. Transtar offers ring and pinion gears in the ratios, diameters and spline counts you’re looking for to complete your build. 


Standard Carriers, Positraction & Limited Slips


When it comes to deciding which differential to use, Transtar carries many limited slip and locking differentials to choose from.  Our knowledgeable sales staff is here to help you choose the design that will best serve your customer’s needs.
See our selection of Auburn Gear's flagship line of limited slip differentials for GM Trucks!  Click Here

Axle & Drive Shaft Components


Only original equipment quality components are guaranteed to meet the same specifications as the parts they replace. AAM Aftermarket provides its customers with high quality, reliability, durability and performance in every aftermarket part it sells. AAM designs, engineers, tests and validates components to meet the same exacting specifications as the parts that they replace. Learn More

Differential Fluids


Transtar-branded Synthetic Gear Lubricants cover almost every differential application. Our fully-synthetic multipurpose gear lubricants are made with premium quality synthetic base oils and additives. Learn More



  • Transtar's limited warranty: products are warranted to be free of defects in material and workmanship for a period of 12 months or 12,000 miles from the date of purchase, whichever occurs first.

    Any manufacturer, third-party, extended warranties, or limited lifetime warranties, should be handled through the manufacturer.

  • Transtar carries Differential parts from the brands you know and trust, including:
    Dana Incorporated
    Auburn Gear
    American Axle
    NSK Ltd.
    NTN Bearing Corp.

  • Yes, even a ¼” of difference in tire diameter will cause a differential to fail due to excessive stress placed on the internals of the carrier. The results can be catastrophic.