I recently installed sct sf3 to correct my speedo for the 37's and 4.88 gears, driving normal trans shifts fine but medium throttle or harder throttle tranny shifts real hard, i looked at line pressure its set at 0, so i was going to move it to -5%... any one else have to do this? shop installed chip as gears went in so i dont know if i return it to stock if it would shift this same way cuz of low gears, i guess ill try to move line pressure negative and see what happens. Anyone else have to do this?

 

Try lowering the pressure to see what happens.
Do you have a modified valve body in the trans or other trans upgrade?

 

just lower the pressure a few times till you find where your comfortable but keep in mind it is better to shift firmly than the original sloppy shift.
less friction and heat within the trans !

oh and my tuner doesnt let me adjust line pressure for shifts but i think if it is set at 0 that means 100% torque is being applied at the shift.
if im wrong somebody will let us know.

 

no i dont have any other transmisson mods, im just going to dial down the line pressure i guess