Okay guys, heres the background: last year installed a new GM tranny. Its an 03 trans in my 00 gtp. The problem I found after installed was that the tfp/prndl switch was different than in 00'. So I came up with a rewire and it worked fine. Other people have since done it and to my knowledge have had no issues. But since the install (with 3.69 gears, 3500 stall, LSD, shift kit and other race goodies) I have always complained about the HARD upshifts on normal throttle and the pcm keeps throwing P1810 at me. Well, that part is understood since I had to rewire and "trick" the pcm for it to recognize what gears it's in.
Well, I did some looking at the diagnostics for p1810. When the pcm gets this code it defaults to MAX line pressure. So that would explain the harsh shifts bcuz I can clear the code every couple blocks and it shifts fine. Now, last year I unchecked the box for p1810 via hpt, but all that does is shut the mil off. How can I stop the pcm from testing this code?? If I can do that, all is well.
Hopefully I made everything clear. Please dont hesitate to ask questions cuz I'm needing some answers very quickly.