June 16, 2022
Watch this step-by-step video to learn how easy it is to assemble and install the Sonnax Smart-Tech® drum module 34555-01K for GM TH400 drag racing transmissions. Although the module has a different design than the OE forward and direct drums, only a few components are unique and anyone used to TH400 builds will have no trouble. Always follow the instructions included with the module for complete directions.
Use the video chapter markers to quickly skip to the step you're most interested in:
While Sonnax makes every effort to ensure the accuracy of technical articles at time of publication, we assume no liability for inaccuracies or for information which may become outdated or obsolete over time.