z34Phoenix Posted August 15, 2013 Report Share Posted August 15, 2013 Ok so i just helped tune a 05 GTP but he is having an issue when he lets off the gas. It will down shift from 4th down to 2nd quickly skipping over 3rd. has anyone seen this issue before? In the tune the only trans settings that were changed were the 2-3 and 3-4 WOT rpm and mph. no other trans setting were adjusted. his stock pcm works fine, but the spare pcm we are using with the tune is having the issue. i also lowered PE throttle enable % to 40% from 48.... could this interfere with the throttle by wire? im just baffled what could cause it to down shift when letting off the peddle. Quote Link to comment Share on other sites More sharing options...
z34Phoenix Posted August 18, 2013 Author Report Share Posted August 18, 2013 Issue solved. I used a new bin file and removed the radio fuse while performing the write. ( full write as the 05 gtp won't accept partial's). Shifts correctly now Quote Link to comment Share on other sites More sharing options...
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