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About the Allison Transmission ECU, WTEC III reman unit (Part Number R29561675)

• Please check your TCM part number to ensure compatibility with this TCM before placing the order
• TCM is non-returnable and non-refundable
• TCM requires programming before use
• If you need help confirming compatibility or programming, please email parts@catalystpowretrain.com or call (800) 872-6691
• Also known as a control module
• Controls transmission operations
• Accurate shifting
• Programmed with variable operating packages based on specific vocation or application
• Allison Genuine Parts™
• Manufactured by Allison
• Built to original factory specifications

Supersedes: 29561675, 29561675, 29537291

The Electronic Control Unit (ECU), or module (ECM), uses a specific calibration to operate the transmission according to their specific vocations.

Warning: WTEC III Electronic Control Unit

The Cin# only provides basic calibration of the TCM. In speciality applications (fire, refuse, etc), some wires may need to be turned on after initial calibration. The core TCM is required to check on wire options.