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February 19, 2026 Service bulletin

Flash: Transmission Control Module (TCM) Updates Customers may comment on the following: SYMPTOM: ●...

Ram technical service bulletin 21-017-26 for 2026 Ram 2500, 2026 Ram 3500 and 2026 Ram 5500 and others.

Bulletin number
21-017-26
Component
Power train
Summary
Flash: Transmission Control Module (TCM) Updates Customers may comment on the following: SYMPTOM: ● Hesitation or delay when accelerating. Customer may state that this occurs when driving at speeds between 5 kph (5 mph) and 20 kph (12 mph) after having previously accelerated from a very low speed and having backed off of the accelerator pedal for a short time. This bulletin involves reprogramming the TCM with the latest available software.

Owners of these vehicles have filed 7 complaints in the transmission category.

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