Review on Hypertech 3000 Energy Spectrum Programmer by Bryan Gallardo

Chevy and Aamco dealers said my transmission problem couldn't be fixed - Chevy said to fix it with a 4950 rebuild replace $. The problem was that when downshifting 2 gears for quick acceleration, the truck hit the lowest target gear, made a noticeable bang and the whole car jerked. I used this programmer to tweak the reg throttle and then increased the shift point by 25% for all gears - and the problem was gone!