i am changing my gear ratio from 3.23 to 3.73, what will i have to change in my tune? I know my speedometer will be off, but somebody has mentioned tranny settings too?

 

ok, for the tranny settings, i figured out i'll have to change my shift points.

what do i have to do to correct the speedometer

 

tunercats, tunerpro or lt1edit?

 

sorry, tuner cat

 

Tools->Speed calibration

 

alright, since i do not have tuning software right in front of me, is there a thing under there for gear ratio, or what? I mean, my tach will still be correct and i have a print off of what my MPH will be at all the RPMS for each gear, but i do want an accurate speedometer too.

 

Yeah, You punch in tire size and rear end gear ratio click compute and then apply

 

thank you man, since my tire size will remain the same, i just change gear ratio than? doesnt sound too hard, thanks for your help. You may get PM's if i have problems lol

 

Youl'l probably need to punch in the tire size as well.