E4OD- No reverse now no problem????

[crewcabxlt]

I came home yesterday and went to back up in my driveway and i had no reverse. It would rev up like it was in neutral. I reved it up alot and it did roll back a few feet but that was it. Today its fine. I took it to the tranny shop and he checked for codes, nothing. Took it for a test drive no problem. What the hell?

[bob harris]

Go to a better tranny shop !!

[BigFuel]

^ agreed. Is it still fine?

[crewcabxlt]

So far so good. Went to work and back today and used reverse both times. Could it be as simple as a stuck valve? I plan on doing a service on it tomorrow myself. Any good additives i should get?

[BigFuel]

I don't use anything special. While you are down there maybe look at adjusting your electronic gear selector sensor. Black thing on the drivers side of the housing. I find it best/easiest to put the PRiNDL selector on the column in reverse, key on, engine off. Then adjust the sensor till the reverse lights come on reliably every time. Had a thought, if the truck acts up again see if the backup lights are on. If they are then it not the electronic selector sensor but the trans itself. Another thought, is there excessive play in the PRiNDL selector in the column? Maybe the shift tube bushings are worn making miss alignment issues.

[crewcabxlt]

I don't think its the shifter. I did notice the engine rpm change when i put it in reverse so i think the computer knows its supposed to be in reverse the tranny just wasn't cooperating.
But so far so good.