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Differential Kits

NTN’s heavy duty differential kit line provides axle repair solutions for a variety of makes and models, including differentials from OEM manufacturers such as Dana/Spicer, Eaton, Mack, and Meritor.  Each repair kit was specially designed for the heavy duty truck aftermarket using OEM preferred products to bring exceptional value.


Our differential kits are only offered with premium components. Whether that is a genuine NTN bearing that is case-carburized premium steel to provide superior fatigue life and reliability, or oil seals that must meet the demanding needs of a heavy duty truck axle.  Each component undergoes NTN’s rigorous testing to ensure parts live up to our quality standards.


We offer two types of differential kits to service the heavy duty truck industry.

Master differential kits save you significant time for a differential rebuild by incorporating all the necessary components in one box - All differential rebuild bearings, seals, gaskets, o-rings, sealant, and thread locker.


We also offer rebuilder versions of our master kits designated “V100”.  These kits offer the same core components but exclude common pieces that differential rebuilders stock such as seals and o-rings.  This offering provides a unique, environmentally friendly solution to your needs while saving you money.

  • NTN BOWER Differential Service Kits Sell Sheet
  • MSDS - Locktite RTV Silicone Gasket Maker
  • MSDS - Locktite Threadlocker