What do I need to hold first or second?
What do I need to hold first or second? I have a truck 4l60e and in manual first non wot it shifts at about 4k. If you are in manual 2nd it will down shift to first at wot. Is there a valve body or PCM mod I can do to fix this?
TECH Senior Member
Joined: Apr 2002
Posts: 6,080
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From: So.Cal.
It depends on the tuning software and the calibration id...
some calibrations have tables for Manual 2nd 1->2 and Manual 2nd 2->1 which can be edited to prevent those shifts.
Not all software packages show those tables for all calibrations (some only have one of those which doesn't help).
some calibrations have tables for Manual 2nd 1->2 and Manual 2nd 2->1 which can be edited to prevent those shifts.
Not all software packages show those tables for all calibrations (some only have one of those which doesn't help).
