Allison WTEC 3 Transmission Harness

The Allison WTEC 3 transmission harness is designed for older Allison electronic transmissions still widely used in conversion projects. This harness supports stable communication between the transmission and control systems, addressing common issues caused by aging wiring.

Built to OEM-style specifications, it’s ideal for restorations, engine swaps, and drivetrain upgrades where WTEC 3 systems remain in service. Durable construction and precise fitment help ensure reliable performance in demanding environments.