Review on JET 99413S Auto Transmission Module by Michael Bressler
It actually works and gets better after the ECU is retrained.
Wow! I can't believe how much this affected my '94 5.2 Jeep Grand Cherokee! I didn't expect to get more power from my Magnum engine. Defiantly you immediately feel the increase in PS/TQ, smoother throttle but can't comment on miles per gallon yet. It took about 2 tanks of gas to really get better and smoother. Here is my build to give you an idea. Headline by Doug Thorley. 3 inch exhaust with high flow coil.
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