Compatibility and fit Designed for NCR60E, 4L60E, 4L65E, and 4L70E transmissions from 1993–2008. Supports both 2WD and 4WD configurations for flexible application across vehicle builds. Factoryspec connectors and reinforced ring terminals ensure direct fitment with stock components. What it does and why you need it Converts an automatic transmission wiring setup to a manual shift configuration by linking the engine control module (ECM) to the manual shift mechanism. Provides precise clutch and gear engagement signals so shifting is more accurate and responsive, reducing guesswork and drivability issues after conversion. Ideal for vehicles repurposed for performance, towing, restoration, or custom manualshift conversions where reliable electronic communication between ECM and transmission is required. Key construction and performance features Copper core wiring for improved electrical conductivity and lower resistance compared with lowerquality materials. Durable outer jacket resists heat, abrasion, and road exposure to maintain reliable operation in varied environments. Plugandplay installation with factorystyle connectors speeds installation and reduces the chance of wiring errors. Reinforced ring terminals for secure battery/ground or component connections and longterm mechanical reliability. Practical benefits Reduces installation time and complexity with directfit connectors and factoryspec design. Improves shift consistency and driver control by delivering clean, accurate signals between ECM and manual shift components. Built to last in temperature engine bays and undervehicle conditions for dependable longterm service. Typical applications and use scenarios 1. Swapping a late‑model GM truck from automatic to manualstyle shifting during a performance or restoration project (1993–2008 4L60E/4L65E/4L70E/NCR60E transmissions). 2. Converting a tow vehicle's transmission control to manual shift mode to achieve firmer, more predictable shifts under heavy load. 3. Custom 2WD or 4WD builds where the original wiring needs to be replaced or adapted for a manual shift controller without modifying the ECM or transmission harness. What's included / installation notes Complete harness with plugin connectors and reinforced ring terminals; copper core wiring and protective outer jacket. Designed to meet factory wiring specifications for a straightforward plugandplay installation. Follow vehiclespecific service manual procedures and safety precautions during installation. Materials and specifications Conductors: copper core wiring. Protection: heat and abrasionresistant outer jacket. Compatibility: NCR60E, 4L60E, 4L65E, 4L70E transmissions (1993–2008); supports 2WD and 4WD setups. Connection: factorystyle plugin connectors and reinforced ring terminals. This harness is intended as a direct, durable wiring solution for manualshift conversions on the listed transmissions, improving shift accuracy and simplifying installation while maintaining OEMstyle connections and reliability.