i have the same need . tuner chip for my 1993 gmc 1500 4.3 w/4l60e new trans still have old trans problem stiff shift from 1-2 only.
i have the same need . tuner chip for my 1993 gmc 1500 4.3 w/4l60e new trans still have old trans problem stiff shift from 1-2 only.
I've had good results using Bluecat Transmission Table Software for adjusting shifts for the 4L60E: https://forum.hptuners.com/showthrea...Table-Software
dave w
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