How much trans PSI for a FLT 4L65E. I looking for max in any gear. I'm asking because when I pulled the engine and tranny I had to cut the hard lines cause they where big time stuck on the tranny and the factory trans cooler broke when trying to remove the lines. Any ways I am looking to do the Aeroquip -an fittings and the socketless hose but the hose is rated for 350 PSI so I just wanted to make sure i buy the right stuff so I can run my tranny lines and install the new cooler. Thanks for the help in advance.

Danny

 

you will be fine

 

i would think you would be fine with the 350psi line.

 

Cool thanks guys.....

 

Your trans at max line pressure in lockup should make 100-120psi and pump about 1.5- 2+ gallons a minute. Or at least that is what I see on the picture in my sig.