I am from across the pond in Scotland.

Was drivinng my 2.8 CRD 2004 Voyager the other day and it slipped out of drive,I pulled over and the car would not go back into any gear at all.
I am at a loss as to what this could be.The car is fine in every other way and there is no engine light on.Checked the transmission oil and it seems fine.
Any ideas????

 

Didn't you ask this here a couple of days ago:

https://www.chryslerforum.com/forum/...rd-auto-16865/

Anyway the advice still stands. Get it scanned for codes. Not going into gear could literally be anything....no hydraulic pressure, TCM issue, failed brake bands or clutches, or other mechanical failure which could have mangled the entire transmission.