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Joined: Oct 2002
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aimee Offline OP
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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

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It sounds like it could be one of two things. I have heard some people that have had trouble with a speed sensor switch of some sort that causes the tranny to not shift right or erratically. They thought transmission was no good, but found out the only problem was that switch/sensor. The other possibility I can think of is that it is overheating. I have heard that these transmissions have a tendency to overheat under real aggressive driving. Also it may be bacause your cooler line or filter is plugged up and you need a tranny flush. Have you had the transmission services done on the car 30,000/60,000/etc.? Mine is coming up on 30,000 so I already have a list of maintenance I need to do. Let me know if you get anything. Hope this helps.

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aimee Offline OP
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I am going to try the tranny flush. Hopefully it will work! Thanks!

Amy

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I read in past years of some speed sensor drives in the trannys breaking. Nylon gears or something? The EEC can't shift well without data.


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