hi, i have 89 firebird and it has 155,000 miles on it. it is 305 5.0 L V8 with automatic transmission(everything is stock). lately i am having this problem. this started when i went up a ramp at an airport terminal
(it was pretty steep) as soon as i came to a stop the engine started to
stall and then stopped. but it did come back on when i turned the ignition, the problem continues when i come to a halt at a light or start from a light, it begins to feel llike it is about to stall when moving between the 2nd and the 3rd gear both when coming to a stop or while accelerating from standstill. i have no problems once it comes on 4 th
gear. it goes 2000 rpm at 75-80mph
when i put it in park it would rev pretty high around 1700 rpm where as my engine used to idle between 1000 and 500 before this..
this problem persisted for 2 days then again it went back to normal (smooth shift like u would not even feel the shift ). then again after a few week i again went to the same terminal to pick my friend up as i soon as i went up the ramp to the top, it started to stall again while i came to a stop. it continued to do the same for 2 days and agian back to normal .
what could be the problem is my transmission going dead.? also what it would cost to change to manual transemission.?