Join Date: Apr 1999
Location: Gilbert, AZ.
Feedback Score: 0 reviews
Why don't you spend a $100 or so and have Ford or a shop run a tool on it, to see why it's not locking up, could be a PCM issue or something cheaper than that.
You can also try to swap in a used PCM and see what happens.
Early 99 F250 XLT,White/Silver,4x4,SC,SB,A/T,PMT1,ARE LSII tonneau,Amp Research power steps,MB Razor's,295-60-20 Nitto Trail Grapplers,Rhino Liner,Rancho9000's,Bushwacker Street Flares,DP-Tuner F5,True-Cool Max,AFE modified-W.D.RamAir,5"Hypermax exhaust,Hypermax DP,Firestone Ride-Rites,2.5" front leveling leafs,AutoMeter-ProComps/triple pillar,heated TTT mirrors,DEI remote start,Amsoil enhanced.