June 16, 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.
Use the video chapter markers to skip to the step you're most interested in:
- Input Shaft & Forward Piston Housing
- Direct Piston Housing
- Sprag Shaft
- Drum
- Final Assembly: Forward Clutch
- Final Assembly: Direct Clutch
- Installation
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