4 Speed 4l80e Reprogramming and Shift Kit water-methanol injection better throttle response

better throttle response

no problem)

Internal speed controller for variable flow operation

BETTER FUEL ECONOMY – Increased fuel economy up to 14%

4 Speed 4l80e Reprogramming and Shift Kit water-methanol injection better throttle responseThis 4L80E Diesel Performance Reprogramming Kit fits all Hummer H1 and HMMWV vehicles equipped with 4L80E and 4L85E automatic transmissions. Common complaints on these transmissions are no upshifts, soft 2 3 shifts, burnt direct frictions, broken hard parts as well as gear ratio and solenoid performance codes. The boost valve assembly is notorious for wear causing both low pressure as well as runaway boost pressure. With the low boost pressure