Drivetrain Tech General discussion of drivetrain for the Ford Ranger.

Transmission cooler rubber hose size

  #1  
Old 4 Weeks Ago
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Transmission cooler rubber hose size

I need to replace the automatic transmission cooler hoses the metal lines are fine. Iím having trouble figuring out what the inner diameter size is.Went to autozone they had no clue. I was just going to buy high pressure hose and cut to fit. 04 4.0 4x4
 
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Old 4 Weeks Ago
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3/8's ID hose is what you want, and high temp hose not high pressure

The trans cooler lines don't have "pressure", there is a lot of flow so some "pressure" just from volume

The way it works is the transmission pump generates about 200psi pressure, that pressure is sent thru the valve body which routes it to engage and disengage clutches and brakes(bands) and hold them in place.
After its used it flows out one cooler line and then back in to the open pan at the bottom of the transmission, at 0psi, no pressure in pan, then its sucked back up by the filter to the pump

But it does run at 190-220degF, so about the same as engine coolant
 
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Perfect ! Thank you.
 
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