I have a 2001 Screw 5.4 and wanted to change the Tranny fluid.My Father-in-Law said I had to take it to the Dealer for this! Is this true? today while on a small grade may RPM's went to 3500 but my speed did not increase! I backed off and felt it down shift, then it was ok.This happened before.I've had the truck since Oct. 140k on it. The fluid is not low but looked dirty. I also have put tw0 sensors, new plugs, New erg and hoses(it blew a hole in one) I dont think the cats are plugged since they look new but I am going to change the exhaust.This problem scares me! Any other Ideas and can I change the fluid/screen? This truck is clean and I love it but Just trying to get it running good again. My 1st Ford! Always had GM and I dont miss 'em Thanks Budddy

 

Do NOT it have it flushed....have it changed and have a new filter installed. Could be all it needs ....you should try that first.

 

The service tech should know that the torque converter can be and should be drained.....and as the foregoing post warns: DO NOT have the tranny flushed.

The refill fluid should be Mercon V....my rides have ATF+4, but that's my preference (and the preference of the shop where I have tranny service done.)

 

Thank you guys very much! this is what will be done! Buddy