I've got a 99 ctd with auto trans and recently its been seeming to go in and out of overdrive at about 40-50 mph, I dont think its the od cause it does it still when out of OD and sometimes in second. I have replaced the tpps about 2 years ago and the map sensor then 3 months a new trans. the map sensor seemed it was the problem originally cus it was frozen. any way I was looking on ebay for a new tps/bellcrank sensor and came across a guy selling wireing plans to repair something on the truck that seems to be exactly what I described. maybe a grounding issue?? anyone have any thoughts on what this fix might be or what problem I might be having. I have a scan gauge2 and it sometimes seems like the tps values at around 13 jump up and down but not sure if its the tps or a wire problem. thanks!!