Carrier rebuild bearing kits are designed specifically to maximize the parts required to rebuild Dana 's most popular carriers. These bearing kits are tailored to customers who do multiple carrier rebuilds, providing them with only the necessary bearing parts to rebuild the carrier, maximizing their rebuild cost. Like all Spicer bearing kits, these include 100% genuine parts, so rebuilt carriers can be reassembled with original bearings that are the same as those installed in the factory.