shifting mystery
#1
shifting mystery
my son has a 99 ram 4x4 with a 5.9 . It didn't shift out of 1st gear.We replaced the govenor selenoid and sensor,and it still did not shift. When we reset the computer it shifts fine. When you start the truck again it won't shift. Every time we reset the computer it shifts fine . I'm baffled on what to try next,does anybody have any suggestions?
#2
#6
Had the same problem but now fixed
I also replaced the pressure switch and solenoid along with a new speed sensor. I finally traced the problem to a ground fault with a oxygen sensor that shares a common ground with the solenoid. to test this just unplug one o2 sensor then test drive it if it doesnt work plug it back in and try the next one. I replaced the suspect o2 sensor and mine shifts like new again. make sure you clear any codes after its fixed. good luck