My e4od in my 1995 f250 160k has been slipping between 3 and OD kinda sounds like toque converter lock up lets go. but when i put the tunes on i notice it in most gears. it has me thinking because some times it shifts fine and the next moment it slips. I heard spedo sensor connection... any info or link to a thread on this issue. no codes and OD OFF light isn't blinking. Thanks
I had transmission issues similar to yours, it was my TC taking a dump. I too had no codes. Some of the things I remember reading were to make sure the fluid levels were right, something about getting proper operating pressure. My other advise is if you want to find the person that knows the least about these transmissions, visit your local Ford dealer. Your experience may vary. I am in no means an expert, just relaying some things I found in my reading.
I had a similar experience you were having, It felt like my 3 to 4 shift was slipping, but it turned out to be my TC slipping more than normal. Then one day, my TC stopped locking up completely. No Codes, no flashing OD light.
Replaced my TC and everything is working fantastic again.