Hey folks how's it going Im looking for some advice started having problems with my 06 F350 6.0 wont shift out of 3rd gear and tow/haul light comes on. Pulled code P0756 bad solenoid but in researching getting this solenoid replaced I seen some people say I need to upgrade all solenoids from factory others say don't and also some people are saying to upgrade the valve body some say rebuild transmission. I have 206k miles on my truck if that helps but now I'm confused on what I should do. Any advice would be appreciated