1968-Present E-Series Van/Cutaway/Chassis Econolines. E150, E250, E350, E450 and E550

Auto trans flush

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  #16  
Old 11-09-2015, 07:15 PM
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Mark Kovalsky
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Originally Posted by wirelessengineer
I can't think of any reason this would not work on any automatic transmission that has any kind of external cooler.
I can think of a reason. I'll even give you an example. The Ford 5R110 cannot be flushed with this method. It has an internal thermostat that will cause the new fluid to mix with the old instead of pumping out the old fluid.

But this procedure will work just fine with a 4R70W or 4R70E.
 
  #17  
Old 11-09-2015, 07:16 PM
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Originally Posted by wirelessengineer
I can't think of any reason this would not work on any automatic transmission that has any kind of external cooler.
I can think of a reason. I'll even give you an example. The Ford 5R110 cannot be flushed with this method. It has an internal thermostat that will cause the new fluid to mix with the old instead of pumping out the old fluid.

But this procedure will work just fine with a 4R70W, 4R70E or 4R75W.
 
  #18  
Old 11-11-2015, 08:29 PM
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Thank you.
 
  #19  
Old 11-12-2015, 08:13 AM
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Originally Posted by Mark Kovalsky
I can think of a reason. I'll even give you an example. The Ford 5R110 cannot be flushed with this method. It has an internal thermostat that will cause the new fluid to mix with the old instead of pumping out the old fluid.

Well! That's good to know. My newest vehicle is a '97, so I'm not up on current tech.

Heh. That opens up a whole can of worms on the debate about where to add and external cooler, but I won't get into that here.
 
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