RAM
21-041-25
Manufacturer communications
- Publication date
- 2025-10-04
- Received by NHTSA
- 2025-10-08
- NHTSA record numbers
- 11024061
Manufacturer summary
Original wording in English
Aisin K1 Clutch/Input Shaft Assembly Replacement XW1 Warranty Extension Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must exhibit/set the following Diagnostic Trouble Code (DTC):
• P0731-00 - Gear 1 Shift Incorrect Ratio. NOTE: This DTC will set during a key cycle and shifting into Drive. Customers may also comment on the following:
• The transmission will not shift into or out of 1st - 4th gears. 5th and reverse gears are still available. This bulletin involves replacing the K1 clutch and possibly the K1 input shaft drum sub-assembly.
• P0731-00 - Gear 1 Shift Incorrect Ratio. NOTE: This DTC will set during a key cycle and shifting into Drive. Customers may also comment on the following:
• The transmission will not shift into or out of 1st - 4th gears. 5th and reverse gears are still available. This bulletin involves replacing the K1 clutch and possibly the K1 input shaft drum sub-assembly.
Reported code forms
Manufacturer wording
Source wording can vary by vehicle and suffix. It is shown as written, not as a universal diagnosis.
Ram
P0731-00Gear 1 Shift Incorrect RatioCheck vehicle applicability
A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.