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Trans won't shift when hot

 
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Old 12 Apr 2013, 08:25 pm
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Default Trans won't shift when hot

I have a 2002 PT Cruiser (automatic) and last week when we were driving home it dropped violently into 1st and would not shift. I limped it home at 30 mph.

2 days later I was going to limp it over to my uncle's house, but it shifted fine a drove fine. About 3 miles down the road it dropped down in 1st again and stayed there.

My uncle noticed 2 motor mounts were broke, so we replaced all of them.

Perplexed about the tranny problem. Help me Cruiser gods!
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Old 12 Apr 2013, 08:28 pm
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Default Re: Trans won't shift when hot

Speaking as a lesser God, I need to ask the obvious..... How's the fluid ? And there's a safe " limp home " feature in most trannies now... Sounds like you need a pro.. spring for the diagnostic... Or where I was raised, my old man made things work with a ball pean hammer .... simpler times
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PS: Hey ant Hey ant ! I love it... I had forgotten about that one ... what was the cartoon again ?
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Old 12 Apr 2013, 08:45 pm
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Default Re: Trans won't shift when hot

fluid was fine.
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Old 12 Apr 2013, 11:49 pm
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Default Re: Trans won't shift when hot

ant and the aardvark on pink panther
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Old 13 Apr 2013, 01:25 am
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Default Re: Trans won't shift when hot

Drop the tranny pan and see what you've got.
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Old 13 Apr 2013, 11:14 am
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Default Re: Trans won't shift when hot

ok, I will check.

Anybody got anything else? There a few topics on this, but no one ever comes back and says what the problem was.
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Old 13 Apr 2013, 11:23 am
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Default Re: Trans won't shift when hot

Fezzersc...
Had that same problem on my daughter's 02. The transmission computer (located under the front bumper drivers side) was the problem. I have also seen the solenoid and pressure switch assembly cause that problem. Do you get a check engine light?
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Old 13 Apr 2013, 11:37 am
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Default Re: Trans won't shift when hot

we replaced the TCU on the left wheel well. No go.
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Old 13 Apr 2013, 11:43 am
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Default Re: Trans won't shift when hot

Might want to pop your connectors off your solenoid and pressure switch and use some dielectric grease. I have seen corrosion problems also cause connection concerns.
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Old 13 Apr 2013, 12:09 pm
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Default Re: Trans won't shift when hot

Mine did the same thing and it was the pressure switch! Good luck!
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