I have been having issues with the e4od in my '91 since I got it. It wasn't shifting, had the tranny rebuilt, still wouldn't shift. After replacing the FIPL myself it was finally able to shift. However, it will not downshift. I adjusted the FIPL or TPS or whatever you want to call it and that...
Long story short I bought a 1991 7.3 knowing it wasn’t shifting out of 1st gear. My only option was to drive it to the nearest transmission shop. After rebuilding the tranny and troubleshooting some sensors came to find no FIPL sensor on the pump. So that is likely why it’s not shifting (though...
New to the Forum. Just bought a '91 with the E4OD and it wouldn't come out of 1st when I picked it up. I was hoping it was just a bad sensor but I replaced the speed sensor on the rear diff and no change. Dropped the pan and found that the previous owner had put some additives or something in...
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