Allison Transmission Specialists

Diagnostics, repair, replacement, and performance transmissions custom built for your needs. All WCFab Built Allison 1000 Transmissions are assembled in-house in our climate controlled clean room. With over 10 years combined experience and hundreds of builds in use to date, we have been able to fine tune and perfect our build selection to provide superior quality alternatives to standard reman options at an excellent value for work horse trucks at our 550 build level, as well high performance options in our 750 and 750+ builds which are designed with competition builds in mind who are looking to get the most out of the Allison and provide capability to withstand the power levels that we are able to produce with the Duramax in race trim.