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trans temp went full hot!!!

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Old Jun 24, 2011 | 07:11 AM
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Exclamation trans temp went full hot!!!

On the way to work today, 5 miles into a 9 mile drive and 76deg outside, the trans gauge went to full hot. The tow/haul light was flashing and it was shifting harder than usual. Checked the fluid and it appears fine...
Ideas? This has not ever happened before and really has me worried now!

edit; engine operating temp is/was normal during this exciting experience.
 

Last edited by embry1123; Jun 24, 2011 at 07:31 AM. Reason: added info
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Old Jun 24, 2011 | 07:33 AM
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That's really weird. When did you last service the trans? Maybe just the temp sensor. The go bad like that sometimes.
 
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Old Jun 24, 2011 | 07:35 AM
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did a drain and fill about 2 weeks ago, 250-300 miles since then.
it took 8 quarts
 
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Old Jun 24, 2011 | 07:36 AM
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also replaced the remote filter about 1000 miles ago

edit; i'll put the A.E. on it this morning to see what I can
 

Last edited by embry1123; Jun 24, 2011 at 07:37 AM. Reason: added info
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Old Jun 24, 2011 | 07:48 AM
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Your TFT sensor in the trans is bad and has to be replaced. It's no big deal to replace it, about a 1.5 hour job. You need 8 quarts of Mercon SP or LV fluid and a new sensor.
 
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Old Jun 24, 2011 | 07:52 AM
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ljutic ss, thanks. Any idea on the cost of the sensor? Does ford usually stock this part?
 
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Old Jun 24, 2011 | 08:08 AM
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There cheap now about $15 they were about $70 but since thousands have been failing over the years Ford must have stockpiled them. Yes it's a stocked item. Do a search on the forum, I wrote a procedure on replacing it. P.S. since you just changed the fluid, I would catch it when draining for return.
 
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Old Jun 24, 2011 | 08:18 AM
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that is such good news! I was expecting the worse. Thanks!
 
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Old Jun 24, 2011 | 08:42 AM
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Originally Posted by ljutic ss
There cheap now about $15 they were about $70 but since thousands have been failing over the years Ford must have stockpiled them. Yes it's a stocked item. Do a search on the forum, I wrote a procedure on replacing it. P.S. since you just changed the fluid, I would catch it when draining for return.

Searched and didn't find it.
 
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Old Jun 24, 2011 | 08:45 AM
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We're assuming you used the correct fluid. Mercon SP or LV. Correct??
 
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Old Jun 24, 2011 | 08:46 AM
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Originally Posted by 69cj
We're assuming you used the correct fluid. Mercon SP or LV. Correct??

Yes, LV. Ford said this supercedes the SP? Is it synthetic as well?
 
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Old Jun 24, 2011 | 08:59 AM
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Originally Posted by embry1123
Yes, LV. Ford said this supercedes the SP? Is it synthetic as well?
Yes and about a buck a qt. cheaper than SP at our dealer.
 
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Old Jun 24, 2011 | 09:00 AM
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any idea what the difference is and why they changed?
 
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Old Jun 24, 2011 | 09:06 AM
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Originally Posted by embry1123
any idea what the difference is and why they changed?
None at all.
 
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Old Jun 24, 2011 | 09:27 AM
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Originally Posted by embry1123
Searched and didn't find it.

Look at my post on the "trans temp gauge problems" that I just bumped up.
 
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