4L80 Perf tune?

[Scrufdog]

The Express shifts like a dream as well. I used the factory tow/haul line pressure from an 2002 Express with an 8.1. Then quickened the shift times. If I get a chance this weekend I will post up the tables. They will not be exactly like the older stuff, but should be able to get you started. My valve body also has a Transgo HD2 kit installed and the EPC cranked 1/4 turn for higher pressrue. It will chirp the tires going into 2nd @ 50 mph.

That would be awesome. Thank you.

[buddrow]

Keep in mind, the harsher the shift the harder it is on the internal components inside the transmission. Just food for thought. With that being said, if you're in northeast Oklahoma by all means crank that puppy up and when you snap something inside gimme a shout and Ill fix you up with a new trans. :)

Buddrow