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Black Dog Customs plug-and-play 4L80e transmission wiring solution for HMMWV® V-belt setups. Purpose-built for adding a 4-speed to an existing 3-speed V-belt drivetrain. Plugs directly into your existing engine harness with no cutting or fabrication required. Includes BDC stand-alone V-belt modification wire harnesses, throttle position sensor, US Shift TCM, all hardware, fasteners, grommets, and step-by-step installation instructions. Most customers complete the wiring start to finish in 30 minutes to an hour. Also available bundled with our BDC TCM Water Resistant Case. Select your option below.

Black Dog Customs plug-and-play 4L80e transmission wiring solution for the HMMWV® 6.5L Turbo Diesel. The most complete standalone harness kit on the market. Plugs directly into your existing engine harness with no cutting or fabrication required. Includes BDC stand-alone 6.5 TD wire harnesses, US Shift TCM, all hardware, fasteners, grommets, and step-by-step installation instructions. Most customers complete the wiring start to finish in 30 minutes to an hour. Also available bundled with our BDC TCM Water Resistant Case.  Select your option below.