If the automatic transmission under your '66 F100 is original, then I'd say it is likely a Cruise-O-Matic (COM) transmission.hotrodz&banjos wrote:great info guys, goin by the charts its an fmx. can you guys give me any info on the fmx transmission, is it good , bad , etc. any problems bolting my 351 windsor to it ? didnt mean to take over this post, just lookin for information. thanx.
Although they were of the same transmission family and shared the same pan, the FMX was a different unit.
I believe the FMX transmissions came out later, like '68/69. I know FoMoCo put the FMX behind the new-for-1969 351-Windsor engines.
I don't know if an earlier '66 COM transmissions would bolt to a '69+ 351W or not.
The FMX is not a popular transmission to hop up, like the C4s and the C6s, but the fMX was put into the '69 Mustang Mach I, so it could take some thrashing....
One way to tell a COM is that the early Cruise-O-matics had a filler tube that attached to the transmission pan.
Whereas the FMX transmissions filler tube slid into the main case. An automatic trans expert I'm not.......
Good Luck!
BarnieTrk
