December 07, 2022

How to Assemble & Install the TH400 Smart-Tech Drum Module

Presented by Sonnax

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. 

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