I have a 12 F250 that is acting up shifting. My transmission has the Ford flare still. I have unhooked the battery and left the door open to reset the KAM. Reloaded the tune, and drove at 30-50-100% throttle up to 80 mph to relearn it. That seemed to help for a while but isn't any more. I watched pressures on my STC GTX . 90 psi at P, R, N. then 65 psi in D. All at idle and 150* temp. It will go up to 70-75 cruising under no load then increase up to 140ish when you add throttle. It does it the worst at 120-140 oil temp after you drive and park then drive again. When the shift occurs the pressure spikes to 399. It seems to do it in all gears. It will occasionally do a really hard downshift like from 6-5 or 5-4. It is really hard, loud and rough. When it first started I drained the fluid and put a new filter in.

It has the TD street tune. I also replaced the trans temp sensor and the line control pressure solenoid. Since doing that it is a little better but does it at higher temp now. Do I need to replace all the solenoids or is it a torque converter issue or the whole transmission valve. It is more random now but I will need this truck dependable in about a month and want to get it repaired while I have time.

 

Does it do it running a stock Ford tune.

Denny

 

I am not sure I can run it on stock since some of the stuff on the truck has failed and been removed. It made it 25000 miles on the tune but that is a thought myself and the transmission guy had as well.

 

What's the normal operating temp fully warmed up, my stock 2013 runs 195 to 205 when it cycling on the thermostat. Mine will have some different shifting until it gets up to temp, I think they unlock thhe torque converter to built up heat to get it up to the temp they want it to operate at. If you aren't reaching reaching the 195 mark I you replace the internal thermostat and make sure it has Motocraft LV fluid.

Denny

 

normal temp is 192-195 when it gets warm enough air temp outside. Right now it is lucky to get 165-175. Once it gets into 4th gear I can feel the TC lock up and I did use Motorcraft LV fluid. Should it get to operating temp when it is 20-30 F? Thought about putting something temporary over the grille to see if it would get warm faster. Where is the thermostat, in the transmission I assume?

 

Yes it's eternal, We run away from snow and cold so I've never been in that cold of weather for any length of time. From what I understand the fluid is shut off to the cooler until the temps are up but I may be wrong.

Denny