What kind of harness are you using? I'm using a NP harness and am having the same type of problems. I pulled the trans and replaced w/ a new one thinking it was a bad trans but 200 miles later I'm back in the same boat and now I'm back looking for a computer or a wiring problem again. Both my trans went bad around 200 miles so I'm REALLY REALLY leaning away from it being a trans problem! My second trans was a known good trans and I was only borrowing it so I really hope it's not @#$-up now! I'll be buying 2 new trans if I screwed that one up! I've gotten all my swap parts from Allen (computer, harness.. etc) but am still having this major issue! I have a really hard time swallowing 2 bad trans in 400 miles and it not having anything to do w/ the computer or the wiring!! Both trans just act like there is no hyd. pressure in the valve body.
Last edited by duckmanjbr; 08-28-2007 at 03:37 PM.
98 GMC ext cab, 02 LS1, Nelson Tune, S&P headers, cutouts, underdrive pulleys, LS6 intake w/ 85 mm intake, 6/7 drop, 20x10 MB wheels, shift kit w/ servo, 3.42 rear w/ true-trac