What is the difference between the "hard shift" and "firm shift" TCM tunes? So far I have been running the hard shift tune adjusted to -4 on all gears and -2 on WOT. Like it a lot, was just wondering if there is really a noticable difference without having to switch tunes in my truck.
2010 Silverado Ext.Cab 5.3L
MBRP exhaust
AirAid MIT AEM filter
Black bear Performance Tuned
2008 Silverado Ext. Cab 6.0L Vortec Max
GMPP exhaust
GMPP CAI
Black Bear Performance Tuned
There is a difference I went with the firm tune at -4 across. The hard tune
Shifts too hard on my truck when I pull my trailer
But if I didn't have to pull it so much I'd run the hard tune all the time
I haven't hooked up to a trailer since the TCM tune. After reading what you said, I am going to hook up tomorrow and see what happens. May need to switch to the frim tune if there are any issues. Still haven't played around with thr shift rpms at all, might get to that tomorrow also.
Thanks for the info, good to know.
2010 Silverado Ext.Cab 5.3L
MBRP exhaust
AirAid MIT AEM filter
Black bear Performance Tuned
2008 Silverado Ext. Cab 6.0L Vortec Max
GMPP exhaust
GMPP CAI
Black Bear Performance Tuned