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Dan, ASE Certified Technician
Category: Buick
Satisfied Customers: 1668
Experience:  Auto Technician
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2000 buick century 3100 transmission starts shifting hard, i

Customer Question

2000 buick century 3100
transmission starts shifting hard, i pull
over and turn the car off for a few min
and it stops shifting hard.
What would be my problem?
Submitted: 10 months ago.
Category: Buick
Expert:  Dan replied 10 months ago.

Hello my name is***** am an ASE Master Technician and I am glad to help you out with your question.

Expert:  Dan replied 10 months ago.

This is a common problem on your transmission. It is usually caused by a p1811 code that is stored in the trans control module. It is caused by the computer seeing a longer shift than is normal. Once the long shift happens the computer will cause the pressure control solenoid to give max line fluid pressure, this is why it is shifting hard, the computer thinks the trans is going out so it will do this. And it usually only happens when the fluid in the trans reaches operating temp. When the fluid is cold it is thicker.

A trans rebuild is the only way to fix this problem. I had a similar vehicle in the past and drove it this way for years. So it does not necessarily need to be fixed right away.

Expert:  Dan replied 10 months ago.

Hello again Dan here,

I am contacting you because the post has not been closed or rated.

This question is coming up on 7 days which means it will time out and close.

You have already paid to get this question answered, but you have not rated.

Let me help some more. Is there anything else I can help you with?

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