Review on JET 80501 Auto Transmission Module by Tim Springer

This device will do nothing but reduce the amount of money in your wallet, which can help you get ahead faster. Other than that, it won't do anything to your car other than your transmission shifts horribly and sounds like it's really falling off the engine. Shifting the transmission into park and reverse also makes a very annoying noise when using this device. I didn't get any noticeable torque, horsepower or mileage, in fact my fuel mileage went down noticeably. After removing this module and resetting the engine computer, I noticed that my transmission shifted exactly as intended, much smoother, and fuel economy increased significantly. In short, don't buy this if you really want your car to last.