Im working on a 1991 E350 van thats been through 3 different shops and no one has fixed the problem yet. It started off as the trans shifting out of od
at speed and not going back into od
until you shut off the engine and everything cooled down(sounds like wiring issues). The van went to a trans shop who promptly pulled the trans and rebuilt it. Gave it back to the customer and the same problem. Then the trans shop swapped in 2 more transmissions, pcm
, and 2 different transmission solenoid packs and it still had the same problem. That transmission shop rolled it to another trans shop. That shop disconnected all of the electronics from the van and said they hooked up some sort of diagnostic tool that they use and the trans checks out. But that shop doesnt deal with wiring. So now I have it.
Now it has even more issues. The od
light is constantly on(not flashing) and cannot be turned off. When you shift it into drive it feels like its starting off in 3rd or 4th. When you shift it into 1st it takes off just fine. I checked voltage from the neutral safety switch to the pcm
and the pcm
is getting signal that the trans is in drive but Im not getting any voltage from the pcm
to the shift solenoids. I told the owner that I can continue chasing down wiring and fix the problem as well as run new overlays for the harness or I could just wire in an aftermarket controller like a USShift/Baunum controller and it would eliminate the pcm
issues as well as the harness issues(27 year old wiring).
So my question is-are these aftermarket stand alone controllers worth my time and if not then does anyone have an idea why the od
light is constantly on and thew trans not taking off in 1st gear while in D?