Every once in awhile for the past few months the o/d light will start flashing and my 96 contour 4 cyl. automatic will begin shifting hard.....fail-safe mode maybe??? Anyway, the other day on the highway it began doing it again. Then suddenly the speedometer stopped working and it wouldn't shift at all. I took it in to the shop and they pulled 2 codes: vehicle speed sensor circuit and torque converter clutch circuit.
They also found that the drive pin was broken. So, they replaced the speed sensor (it was locked up).
I thought all was well, but yesterday and today the o/d light flashing and hard shifting is back. It seems like it starts when I'm going up an incline or hill.
Any ideas on what might be going on?
Thanks,
Aimee