hey man i didnt know u had led tail lights that mite be ur problem i think. my buddy put a flat bed on his obs and put leds and wen he would get on the pedal it would unlock but wen he let off it would lock back up also check ur manual lever position sensor and do have a trailer brake??
mite not be the same problem but i figured mine out and it was a dirty mlps i took it off and cleaned real good then cleaned the conection give it a shot
97 f250 7.3 e40d i have no drive gear and torque converter does not engage takes off fine in 1st the manualy shift up to 2nd fine the around 25 put it in drive goes in but does not shift into overdrive nor the t converter engsges when u put it in drive its feels and sounds like neutral only it...
i seem to have dat same issue it started its done it before but i would mess with the lever and get it working but now it seem like its starts out in 3rd or just slips alot in 1st. when i shift manualy its fine but the converter aint locking. i had trailer brake issues before any suggestions???
mine did dat once and i still havent figuerd it out compltely but for sum reason my trailer brake is wired into my tranny and i unplugged it one day and went to drive it would start out in 2nd pluged it in works fine dats how i bought the truck 97-f250 7.3 e4od 4x4