more 904 trouble

make sure gear select is not between gears ,detents,be sure if your using like a b&m shifter that you have the trans arm for a B&M . the 904 is a good trans been using them for years they are harder to fine convertors for than 727 but not that much any more lots of people using them now, not like it was 20 yrs ago . also make sure who ever build's the trans no where to drill hole's in case. some manual valve bodies have to have a hole drill in accumulator to inside of the case to work right just food for thought