48RE Trans

[jeeping_0]

does it pump fluid in park

 

[sanfordJ]

Yes but only 10-20 psi and it doesn't pump fluid through the torque converter.



In Neutral it pumps fluid at 0-30 psi through the cooler and 5-50 psi through the converter.



For more information refer to the 2006 service manual pages 21-1323 through 21-1335.

 

[CPittman]

My transmission builder said the stocker doesn't pump fluid in park (there are probably some particulars that I don't understand) - so, if you're running a stock transmission - put it in neutral if you're idling for an extended period.

 

[Troll]

The torque converter is connected to the pump directly, therefore the pump is always turning/pumping when the truck is running.