my 86 w/ 149k on the clock runs great when cold, when warm the transmission won't upshift and the rpm will be 3000 at 30 mph! any ideas, i don't want to drop alot of $ into a 21 yr old car, but she does look and drive great, (other than this problem).
ps if i come to a stop, put the car in park and then drive, it will upshift to a higher gear for a few seconds and then downshifts and won't upshift again!!