My 2001 Prius just started a vibration, shimmy, shake when driving. It seems to happen when the transmission would be changing gears. It is an automatic. It is not affecting the power. Still goes up to 80mph. The vibration seems to lessen at high speeds and the longer it is running. If it sits for a few hours, the vibration starts out bad again. We changed the transmission fluid and it seemed to help a bit at first but the vibration is still horrible. Please advise.
What makes this problem better or worse?
it is worse when the engine is cold
How long has your 2001 Toyota Prius had this problem?
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