RAM 1500 2025 — technical service bulletin
Bulletin 21-011-25 REV. A · NHTSA communication 11020118 · issued Jun 28, 2025
Technical service bulletin
communication type
Power Train
component
2025
model years
1
vehicle entries
Official summary
Flash: Transmission Control Module (TCM) Updates The customer must describe one or more of the following: ● **No perceptible change when drive mode is selected. ● Harsh or unstable launches in slippery or off-road conditions. ● Drive mode operating in incorrect drivetrain configurations.** ● Bump or jerk felt during Engine Start/Stop (ESS) operation in normal and snow modes. ● Bump during tip-in downshift while in Normal or Sport modes. ● Transmission shifting concerns when vehicle has less than 1500 miles (2414 Km). ● Driveability concerns and not holding correct gear during downgrade, snow m
Vehicles covered
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.