just picked up an 85 berlinetta (second consecutive camaro) and when i first got it (3 weeks ago), it shifted nice and smooth, now it shifts a bit harder and i think i have no O/D. (finding it difficult to count shifts lol) at 70 mph it is running at almost 3000 rpm, my 92 rs ran at 2000 at 75mph. what would cause just the O/D to not work? fluid level is on the high side of good

 

Not sure but if the fluid is dark and smells burnt at all the unit has to come out.

 

scratch the dark and smelly part, i was going off a bad memory, just checked it and its fine

 

If the converter is not locking up on the highway it will overheat and burn up the trans.