"Flash: Transmission Control Module (TCM) Updates Customers must experience a Malfunction Indicator Lamp...
Ram technical service bulletin 21-055-24 for 2021 Ram 1500.
- Bulletin number
- 21-055-24
- Component
- Power train
- Summary
- "Flash: Transmission Control Module (TCM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must exhibit/set the following Diagnostic Trouble Code (DTC): ● P0731 - Gear 1 Shift Incorrect Ratio. The customer may describe the following: ● Severe bump or clunk during high engine rpm and low vehicle speed 1-2 upshift. ● Unable to set desired gear manually from the steering wheel controls This bulletin involves reprogramming the TCM with the latest available software."
Owners of these vehicles have filed 100 complaints in the transmission category.
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