Transmission Fluid
Buick Century

What causes a 2000 Buick Century to hard shift when warm but goes away when cold?


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You probably need to have the transmission rebuilt. I just had mine done. It started shifting hard when it got warmed up. I took it to a transmission shop and they hooked a computer to it and got a 1811 code which they said meens internal damage and needs to be rebuilt. I just picked it up this morning so I hope it will be ok now, since it cost me $1700 bucks.