how low can i safely lower shift firmness in 4R70W with SCT?

04ctd · 10-08-2009, 11:00 PM

had my tranny rebuilt in the 99,

and put a mild shift kit in it.

due the number of variables in a 135k mile tranny that has been rebuilt once at least,

it came out a LOT firmer than we thought.
not too firm for one of us,

but too firm for my Dad.

i have them down 10%, it goes in five % steps down to 25.

it also allows you to change the MPH, but i have not monkeyed with that.

??

10-08-2009, 11:00 PM	#1
04ctd Senior Member Join Date: Aug 2009 Location: Ladson SC Posts: 4,388	how low can i safely lower shift firmness in 4R70W with SCT? had my tranny rebuilt in the 99, and put a mild shift kit in it. due the number of variables in a 135k mile tranny that has been rebuilt once at least, it came out a LOT firmer than we thought. not too firm for one of us, but too firm for my Dad. i have them down 10%, it goes in five % steps down to 25. it also allows you to change the MPH, but i have not monkeyed with that. ??