Flash: Transmission Control Module (TCM) Updates
Ram technical service bulletin 21-007-21 for 2020 Ram 3500 and 2020 Ram 4500.
- Bulletin number
- 21-007-21
- Component
- Power train
- Summary
- Flash: Transmission Control Module (TCM) Updates This bulletin involves reprogramming the TCM with the latest available software. The customer may experience one or more of the following:Poor shift quality. Shift or gear hunting. The following software enhancement is also available: Stored faults can only be cleared by a diagnostic scan tool, this software will allow the TCM to self clear.
Owners of these vehicles have filed 12 complaints in the transmission category.
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