The Allison 29554091 Transmission Wiring Harness (Internal) (Gen4) LT1000 10-25 is a genuine OEM transmission part manufactured for Allison Transmission. This highly specialized wiring harness is designed specifically for the LT1000 10-25 transmission, ensuring a perfect fit and reliable performance. Perfect for car and truck owners looking to replace or upgrade their transmission wiring, this product is a critical component for maintaining the smooth operation of the vehicle.  This harness is the exact same harness that would be installed at production of the transmission.  All components of the harness meet OEM specifications INCLUDING the wire.  Many of these "replacement" harnesses are built with general purpose automotive wire which fail at high temperatures.  This harness uses high temp, anti-capillary transmission wire.