5 or 6 speed auto on a 360??

A500 or 42RH. These are the 904 versions of the overdrive tranny. The tail shaft part, which is the overdrive, is externally identical to the A518, 46RH. or 47RH, the 727 version. The difference is in the amount of clutch discs and planetary pinions. The diesel versions have straight cut planetary gears.