Hi all i have a 2004 Cavalier Ls sedan 4 speed automatic and i noticed yesterday, first time i'd noticed this too i was on the freeway and as soon as i hit 4th gear and the rpms dropped off the engine started running rough for about 30 seconds like maybe it had a miss or something. It only did it for 30 seconds then it cleared up anyone have any ideas what would be causing that is it possibly fuel related.

oh yes , no cel light either

Does it feel like it misfires really fast, or does it feel like it's doing it fairly slowly? My GTP would feel like a misfire when it did TCC lockup for OD, but it did it really slow. One tranny fluid change later and it's fine.

it did it pretty fast almost like a really faint shudder i had my tranny fluid changed awhile back but maybe it needs it again i don't know

how many miles are on your car and when was your last maitenance??

my last real maintenance was around 57,000 or so i got a notice not too long ago saying i was due for my 66,000 mile checkup, but i don't usually bother with that stuff because dealers always want an arm and a leg for that and i am not mr. Gottrocks i had my oil changed here about 1,000 miles ago .

i have about 69,600 on there right now .