first i loose over drive than drive and 1 and 2 still work and the first 1 i drove like that for over 6 months and second kept on driving in 1 and 2 also, i rebuilt the 1st one and put it in and it is also doing the same crap again
I am on my 3rd transmition and all 3 have done the same thing, on 1993 Chevrolet Suburban 1500
possible issue with sensor. possible wrong grade fluid used. tranny fluid fussy as it actuates off of internal pressure. to thick or thin will effect function, and trip sensors.
what kind of rebuild are you installing? who is r/b it 4 you, should come with at least 12 month 12k mile warranty.dlr trans comes with 3yr 100k mile warranty or are they just repairing whats wrong inside only?