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6.0L Power Stroke Diesel 2003 - 2007 F250, F350 pickup and F350+ Cab Chassis, 2003 - 2005 Excursion and 2003 - 2009 van

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Old Feb 13, 2011 | 03:01 PM
  #16  
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XB70
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Here's a question for Mark Kolvalsky:

I've noticed that during winter, my transmission temperatures have not exceeded 160 F. (ScanGauge II reading factory sender.)

Does this mean the thermostat hasn't opened and the fluid that's in the pan stays in the pan and the fluid in the cooler remains there? In other words, if I drained the pan and refilled with 8 - 9 quarts of Mercon LV and drove around never exceededing 160F, would the new fluid mix with the old?
 
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Old Feb 13, 2011 | 04:07 PM
  #17  
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Mark Kovalsky
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Even with the thermostat closed 10% of the normal flow goes to the coolers. So it's always mixing.
 
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Old Feb 13, 2011 | 05:11 PM
  #18  
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Thank you.
 
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