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The internal wiring harness for GM 4L80E transmissions is located inside the transmission pan where the wires, the loom and connectors are constantly exposed to high temperatures, mechanical vibration and transmission fluid. Over time, these parts can get hard and brittle, increasing the possibility of having potential issues down the road. For optimum performance, B&M offers this high quality "plug and play" replacement harness for all 1994-2003 GM 4L80E transmissions. Features include all new wiring, polyethylene wire loom, new factory style connectors, temperature sensor, rubber O-ring seal and installation instructions. Note: Can also be used on 1991-1993 4L80E models, but will require either an updated external connector to plug into the internal wiring harness, or add a B&M Shift Plus 2 controller part #120001 that allows you advanced control features to custom tune shift points, torque convertor lock-up, manual mode and more.
As performance enthusiasts today, most people are accustomed to having access to whatever performance parts they need for their vehicle readily available at their local dealer. It usually never crosses anyone's mind who invented these products? Who was the first to identify the need, then develop and manufacture that product? Since the very early 1950s, B&M has been at the vanguard of the growing automotive aftermarket. Racers themselves, B&M’s founders identified the needs of local racers and street performance enthusiasts, and developed products to fill those needs. As the industry grew so did B&M. And as racers went faster, B&M developed products to help them break the records they just set. In the 50's it was B&M who came up with the idea of using a performance reinforced Hydramatic for racing. In the 60s it was B&M who developed shifters to go along with it, and later in the decade came race converters. In the 70's shift and transmission improving kits, and always the constant refinements and expansion of existing product lines. If you’ve ever raced a vehicle, or driven a hot rod with an automatic transmission, high stall torque converter, an aftermarket automatic shifter, or performance enhancing shifting kit, thank B&M. From Trick Shift performance ATF to reverse pattern valve bodies, 1.80 gearsets to cool canisters, the list of firsts goes on and on. It’s this tradition that keeps moving B&M to identify and develop what the performance enthusiast needs. As racing and street performance has spread globally, B&M has taken it’s extensive knowledge and experience and applied it to the needs of racers, everyday drivers and hobbyists around the world. Keep looking to B&M to continue to be amongst the very first to identify vehicle needs in the global automotive aftermarket, supplying enthusiasts and racers what they need, performance!
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