2021-2023 Jeep/RAM P1DB7-00 Torque Converter Clutch TSB

Stellantis has released Technical Service Bulletin (TSB) 21-040-25, dated October 2, 2025, to address a specific issue affecting various 2021-2023 Jeep, RAM, Chrysler, and FIAT models equipped with the 9-speed 948TE automatic transmission. This bulletin provides information regarding a potential assembly misalignment that can lead to premature wear of the reaction shaft bushing. When this occurs, vehicle owners may experience a "Malfunction Indicator Lamp (MIL) illumination" on their dashboard and the Diagnostic Trouble Code (DTC) P1DB7-00.

Symptoms

Owners of affected vehicles may notice the "Malfunction Indicator Lamp (MIL) illumination" on their instrument cluster. This warning light indicates a potential issue with the vehicle's powertrain system. Concurrently, the vehicle's diagnostic system will likely store the specific Diagnostic Trouble Code (DTC) P1DB7-00, which points to a "Torque Converter Clutch Performance" issue. If you experience a "Malfunction Indicator Lamp (MIL) illumination" and suspect a "Torque Converter Clutch Performance" problem in your Jeep Compass P1DB7-00, it's important to have it diagnosed promptly.

Fault Codes / DTCs

Code	Description
P1DB7-00	Torque Converter Clutch Performance

What the TSB Addresses

TSB 21-040-25 details that an assembly misalignment can cause the reaction shaft bushing within the 948TE transmission to wear prematurely. This premature wear directly impacts the performance of the Torque Converter Clutch (TCC), leading to the symptoms described. The underlying cause is identified as a reaction shaft misalignment.

Diagnostic Conditions

The "Malfunction Indicator Lamp (MIL) illumination" and DTC P1DB7-00 are typically triggered under specific conditions related to the Torque Converter Clutch (TCC). The system will set the DTC if the difference between the actual slip and the target slip of the TCC is greater than a calibrated threshold for a certain period. Additionally, the DTC is set if this failure has occurred twice, and the input shaft side-to-side measurement is found to be larger than 0.027 mm (0.0010 in.). This measurement is a critical factor in diagnosing the reaction shaft misalignment in your Jeep Compass P1DB7-00.

Repair Solution

An updated service kit is now available to address the reaction shaft misalignment and premature bushing wear. This kit, identified by Part Number (P/N) 68732959AB, is specifically designed for the Reaction Shaft Service. It is crucial to note that this service kit is only applicable for repairs where the input shaft side-to-side measurement exceeds 0.027 mm (0.0010 in.). The repair involves replacing the affected components with the new service kit, which should resolve the "Torque Converter Clutch Performance" issue and clear the P1DB7-00 code.

Required Parts

To perform the repair described in TSB 21-040-25, the following part is required:

• P/N 68732959AB - Reaction Shaft, Service Kit

Important Warnings

This bulletin is supplied as technical information only and is not an authorization for repair. It provides guidance for technicians but does not automatically authorize warranty claims or specific repair procedures without further manufacturer approval. Owners should be aware that this is an informational bulletin for service professionals.

Owner Action

If your vehicle, particularly a 2021-2023 Jeep Compass, Jeep Renegade, or RAM Promaster City, is exhibiting a "Malfunction Indicator Lamp (MIL) illumination" or has stored the DTC P1DB7-00, it is recommended to visit an authorized Stellantis dealership. Technicians can perform the necessary diagnostic checks, including measuring the input shaft, to determine if your vehicle is affected by the reaction shaft misalignment and qualifies for the repair using service kit P/N 68732959AB.

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Source: NHTSA ID: 11024056