Eaton Transmission Harness Repair Kits

Worn or damaged connectors on Eaton Autoshift and Ultrashift transmission harnesses cause erratic shift behavior, fault codes on the dash, and compromised communication between the transmission control module and the engine ECM. A full harness replacement is expensive and labor-intensive when only the connector has failed.

Kustom Truck Parts stocks Eaton transmission harness repair kits that isolate the damaged connection and restore reliable electronic communication with OEM-quality plugs and pre-terminated wires. Each kit is matched to the specific Eaton connector causing the issue, so you replace only the failed section rather than the complete harness assembly.

These kits support both OEM repair and transmission conversion builds across Kenworth and Peterbilt platforms. For complete Eaton harness assemblies, see our Eaton Autoshift & Ultrashift transmission harnesses. Browse below by connector type, or contact our team for help with identification.