ok my friend has a 1998 civic HX automatic. his tranny was bad so we got a automatic tranny off 1993 civic dx. Both motors are stock. He took it out and tried to install it but found out that it doesn't fit. Why is this, i thought all d-series are interchangable or is this his mistake of not knowing how to install it. what gives? is there anyway i can make it work without getting another tranny.