crazyhorse

correct me if i am wrong [been a long time] but i think a c4 separates from the bell housing.

my77stang

yeah easiest way to separate a C4 and C6 is the C4's bellhousing comes off and the C6 bellhousing is cast into the rest of the case.

89Ford

how about aod and c4

89Ford

and what do i need to do to make it race preped

Blckstng93

Yes. If the tags are missing or whatever, the C4 has a filter with the valve body, a C5 will have what looks like 2 valve bodys one on top of the other along with the filter. The C4 was used from 64 to 82 and then replaced by the C5 which in turn was replaced in 86 by the AOD*. The C3 was basically a light duty C4 used from 74 to 86. The C3, C4, and C5 have a seperate bell. The AOD has the bell and case cast as one piece, and as My77stang stated, the C6 bell and case are cast as one piece also.

*A sidenote on the AOD. The AOD didnt show up until about 84 in the Mustang with the EFI 5.0 motors. An AOD has 'Automatic Overdrive Metric' stamped onto the pan. Easy to spot.