Its pretty simple really... you have 3 gears
on the normal trans then you you go to lock
up then to OD.. the clutch in the converter
is probably what you dont think of.. I run a
OD trans(it has a clutch in the trans but I
dont run a OD conv so I only get 1,2,3,OD..
thats with a 518 trans
EDIT
I could have lock up and the direct backwards(I
do a lot of times
but there is another clutch in the conv (but
I love my OD)