Flash: Transmission Control Module (TCM) Updates
Ram technical service bulletin 21-018-21 for 2021 Ram 1500.
- Bulletin number
- 21-018-21
- Component
- Electrical system
- Summary
- Flash: Transmission Control Module (TCM) Updates This bulletin involves reprogramming the TCM with the latest available software. The customer may describe one or more of the following:During a 2 - 3 transmission upshift, the engine is hitting rev limit. Hesitation feel during a pedal tip in, while engine is warming up below 1 °C (30 °F) ambient temp.
Owners of these vehicles have filed 201 complaints in the electrical category.
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