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Old Mar 25, 2009 | 08:52 AM
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locked up?

this has bothered me for a long time. I have a 2000 F53 motorhome that has a tendency to lock up at low speeds. When I come up to a traffic light and stop the vehicle jerks, and dies as it stops. If I place selector in neutral while slowing the problem occurs as the selector is placed in drive to take off. It lurches and jerks and dies again. If I rev the engine and let it jerk a few times it will proceed. It often takes several attempts. This problem only occurs occasionally. Any ideas?
Hal
 
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Old Mar 26, 2009 | 12:37 PM
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What engine?

Maybe the IAC if it's a V10.
 
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Old Mar 26, 2009 | 01:10 PM
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I would say the torque converter isn't releasing. I have heard on this site that if your low on trans fluid it will do that. Good place to start, if not you might have to have it looked at.
 
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Old Mar 26, 2009 | 01:13 PM
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Engine is V-10. Please define IAC.
 
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Old Mar 26, 2009 | 01:19 PM
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IAC is the Idle Air Control valve. If it's not working, the PCM can't hold the idle.
 
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Old Mar 26, 2009 | 01:28 PM
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Originally Posted by bubbasz1
I would say the torque converter isn't releasing. I have heard on this site that if your low on trans fluid it will do that. Good place to start, if not you might have to have it looked at.

+1 on that. Classic example of a locked TC.
 
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Old Mar 26, 2009 | 01:35 PM
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thanks;
This problem may indeed be the torque converter. It really seems like something is sticking. I thought the isssue may be a locked up converter but I really didn't know if it even had a locking converter. I am not real familiar with Ford stuff. The trans dipstick is about five feet long. Reading the dipstick is not very accurate as it has a white plastic nub on the end that is covered in fluid. Is the check hot and running as others?
 
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Old Mar 26, 2009 | 01:47 PM
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Yep, hot running in park.
 
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Old Mar 26, 2009 | 02:08 PM
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Is the OD light flashing?

It does sound more and more like a locked up converter.

Does it do it all the time, every time, or is it a hit-or-miss thing?
 
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Old Mar 26, 2009 | 02:18 PM
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intermittant. More now than previous at 70K. I have not noticed OD light flashing. It is a very solid mechanical problem. The motor home weighs 16,000 and we tow a trailer 5,000 lbs w/ race car. It really jerks. I will do the proper service over the weekend. Trans flush for this critter is BIG $. Thanks again for all the help.
 
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