i've got a 91 firebird, another 2.8l v6, and today when i was driving around, i noticed that while in drive the transmission never shifted up to 2nd or 3rd gear. i know the tranny isnt blown because it still has reverse as well. any suggestions?

 

Either you stayed below 25mph or it shifted, be it a noticable shift or not.

 

no, i was going above 25, and everytime i touched the gas pedal the rpms shot up from 2k to about 3.5k, and never shifted.