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2004 to 2008 F-150 and Mark-LT
4.2L, 4.6L and 5.4L equipped F-150s and Mark-LTs.


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  #1  
Old Wed, December 9th, 2009, 07:30 PM
04FX4 04FX4 is offline
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Default TQ question.

I live in Canada and now with the weather change, I have noticed that it takes alot longer for my TQ to lock up, Is this normal?
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Old Thu, December 10th, 2009, 12:28 AM
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Originally Posted by 04FX4 View Post
I live in Canada and now with the weather change, I have noticed that it takes alot longer for my TQ to lock up, Is this normal?

From a cold start and if it's during the first 10-20 minutes of driving it could be due to the fluid not being warmed up.
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Old Thu, December 10th, 2009, 09:35 AM
04FX4 04FX4 is offline
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Afetr about 2 min of driving I am on the highway. I will hit 90-100 for a min or 2 then she locks up. In the summer well it would happen right away. I have been watching my temps on my gryphon and it seems when the tranny hits around 100 it locks, but not before.
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Old Thu, December 10th, 2009, 12:54 PM
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I think your numbers are normal and I'm pretty sure the 90-100 you are throwing in represents kph, not mph (which would be about 55-60 mph), right?

In the winter, even here in Tucson, where I live it regularly goes below freezing in the early mornings and if I take the truck out it takes about a minute for things to warm up enough for the TQ to lock up.

You're probably operating in "open loop" during that period too, for what it's worth.

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Old Thu, December 10th, 2009, 07:13 PM
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Yes Kms not mph..
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Old Thu, December 17th, 2009, 08:07 AM
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There are both cold and hot TFT strategies for the converter lockup. This is where the difference is that your feeling and it's completely normal.
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