When building a high performance 3-speed transmission, the direct drum is one of the most important components to upgrade - reliability, safety, and performance can all be improved. As in the case of the TH400, the shafts and gear sets are very durable, and if the drum is upgraded, the power rating of the transmission nearly doubles.
BTE offers three solutions for the direct drum replacement in a TH400 transmission:
34 Element Sprag Upgrade
In our experience, the...