Flash: Transmission Control Module (TCM) Updates This bulletin involves reprogramming the TCM with the...
Ram technical service bulletin 21-001-21 for 2019 Ram 3500 and 2019 Ram 4500.
- Bulletin number
- 21-001-21
- Component
- Electrical system
- 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 6-4 and 5-3 shift can have a bump. Some 2-3, 3-4 or 4-5, shifts may flare when the transmission is cold. Coastdown bump. The following software enhancement is 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 21 complaints in the electrical category.
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