4 Speed 4l80e Reprogramming and Shift Kit water-methanol injection Pretuned for Hmmwv’s and H1’s

Pretuned for Hmmwv’s and H1’s

BETTER FUEL ECONOMY – Increased fuel economy up to 14%

no problem)

OEM brushes and brush holder for extreme long life

This can lead to increases in torque and horsepower

4 Speed 4l80e Reprogramming and Shift Kit water-methanol injection Pretuned for Hmmwv’s and H1’sThis 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