well here's the problem.....i went to the track last week and my trans started to act up. i did my burnout and i noticed a check engine light came on as i was staging. but i figured id go for it anyway. when i launched my truck left in 2nd gear and shifted into third slightly early. when i got on the return road i stopped and checked the fluid.......clean and full. as i drove away it was in 1st and took a long time to shift 2nd and it was a very harsh shift. after resetting the computer a few times it started to shift normal around the pit area, so i decided to race again. everything seemed normal but the truck was a bit slower than usual. i havent had problems with being stuck in 2nd gear for a week, but on easy acceleration my 2nd to 3rd shift feels sloppy. it almost feels like it shifts 3rd, hits neutral for a split second, then goes into 3rd. and i checked the fluid again and it looks fine. my truck has 29000 miles and i did a trans service around 21000 miles and used amsoil atf4 and a wix filter. i cant seem to figure this out, anyone ever have this problem? my truck is a 01 dakota 5.9 r/t. the check engine light came back on and the only code i have is P1281 undocumented code. its been throwing that code for 2 months now, usually have to reset it every other week.