Transmission trouble shifting 2-3 and intermittent reverse
I have a 2003 F-250 with 93k miles on it. Mods include AFE Stage II intake, 4" turbo back exhaust, and DP Tuner.
The transmission is not shifting at the proper shift point from 2nd-3rd. It will shift at around 3200 rpms. Reverse is also an issue. It goes into reverse great when it's cold and been sitting. Once the temp comes up, reverse is hit or miss. If I drive it for a while, trans temp comes up to about 190 and it goes into limp mode. I know the temp is coming up because it's shifting at higher RPM.
This problem began a year ago. I parked it for about 6 months and the problem disappeared when I started driving it again. I've been driving it everyday for the last 6 months and it just started happening again.
At this point, it's parked and I'm trying to determine if it's something as simple as a valve body or if it needs a rebuild.
I've done some reading on old threads and there seems to be a difference in opinion on what is necesary to fix the problem.
Any help would be great.