What is "Performance Mode"
"cruise" and "hot" modes with their own tables for shift
pressures and times. Some vehicles have access to the
"performance" mode through the "tow/haul" switch, but
the 4th gen F-bodies didn't. Probably this is your wire,
if the harness is supposed to be truck-like (not a bad
bet since trucks are good common organ donors).
Now, me, I just set up "normal" for how I like it (pretty
much like you'd set up "performance" I expect) and I
have no use for anything softer or more economical.



