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October 4, 2025 Service bulletin

Aisin K1 Clutch/Input Shaft Assembly Replacement XW1 Warranty Extension Customers must experience a...

Ram technical service bulletin 21-041-25 for 2022 Ram 3500, 2022 Ram 5500 and 2022 Ram 4500.

Bulletin number
21-041-25
Component
Power train
Summary
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.

Owners of these vehicles have filed 139 complaints in the transmission category.

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