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July 9, 2026 Service bulletin

Flash: Transmission Control Module (TCM) Updates Customers may comment on one or more of the following:...

Ram technical service bulletin 21-056-26 for 2021 Ram 1500.

Bulletin number
21-056-26
Component
Power train
Summary
Flash: Transmission Control Module (TCM) Updates Customers may comment on one or more of the following: SYMPTOM: ● Harsh or slipping feeling during upshifts (1st - 5th). ● Harsh or slipping feeling during kickdown events under throttle. ● Transmission fluid odor (burnt smell). ● 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. 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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