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Vibration in overdrive only about 65mph

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Old 11 May 2019, 11:33 am
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Default Vibration in overdrive only about 65mph

I have a 2000 PT that runs great except only when overdrive and only between 60 and 70 mph. It vibrates terribly. Can downshift into 3rd and vibration goes away. it isn't engine speed related, because at the rpm noticed there is no vigration in any other gear nor in neutral. Also if I hang in there a few minutes, the vibration suddenly goes away until I either slow down or speed up, then at between 60 and 70 it returns.

Has anyone else experienced this? If so, did you find a fix? Transmission shop says we need a new txmission. Could this be in the solenoid pack?
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Old 12 May 2019, 07:01 am
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Location: Lake Wales, FL
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Default Re: Vibration in overdrive only about 65mph

First thing I'd check is the half-shafts. How many miles are on it?

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Old 13 May 2019, 08:24 am
Fk5 Fk5 is offline
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Location: Colesville, MD
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Default Re: Vibration in overdrive only about 65mph

I just started getting a slight vibration on my wife's 200. I haven't started diagnosing yet, but in the old days the lock-up torque converters would make a similar shudder. I am a 4 speed guy (I know the PT has 5 speeds and my other car 6, but I am still a 4 speed guy dammit!) so I will wait for someone with knowledge of these automatics to chime in. I know a bunch of the guys that drag their cars - Nitro? Neon? use them.
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Old 13 May 2019, 09:04 am
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Default Re: Vibration in overdrive only about 65mph

The list:
Type in: front wheel drive car vibrations possible problems.

Then start down the list.

Even a PT Cruiser falls into this catagory. There is no common to only reasons on a PT Cruiser to cause any vibrations.
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Old 13 May 2019, 03:55 pm
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Join Date: Jul 2016
Location: east central wisconsin
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Default Re: Vibration in overdrive only about 65mph

At vibration speed have you tried pressing down and letting off the throttle? Could be just a worn rubber thingee somewhere. Getting to be that age.
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Old 13 May 2019, 04:08 pm
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Default Re: Vibration in overdrive only about 65mph

When I had vibration at 60 to 70 mph I found out the spark plugs gap was up to .085 gap. After replacing spark plugs no more vibration.

If spark plugs good try raising the front end and see if it still vibrates without a load.

Post what you find out.
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