What's the difference between a MX and a FMX?

[nikon4u]

What's the difference between a MX and a FMX? I had a tranny guy at a shop tell me that there is no such thing as a MX. Is he right?

[68F250]

FMX came out in '68, had the MX internals in the FX case. They are all in the Cruise-O-Matic family.

http://en.wikipedia.org/wiki/Cruise-O-Matic

Find another shop.

[tex1264]

I've never heard of a mx! but i got a cruiseamatic in my 63 galaxy 500. i was thinking its a fmx!

[69rangerman]

Copied from wikipedia article:

Cruise-O-Matic
The original Cruise-O-Matics used a torque converter and planetary gearsets, giving three forward speeds plus reverse. In some applications, Ford offered a dual-range option allowing the driver to start in either first gear or second gear.

Ford dropped the "Cruise-O-Matic" tradename during the 1970s; in the 1950s and early 1960s promoting the automatic transmission as a feature was a standard practice among automakers as they were relatively new. By the late 1970s most cars had automatics as standard equipment and there was no reason to especially call attention to them. The transmissions were marketed as the Merc-O-Matic when installed in Mercury vehicles.

[edit]
MX/FX
The original versions, known internally as MX (larger) and FX (smaller); the MX was built in the Livonia Transmission Plant in Livonia, Michigan and the FX was built in the Fairfax Transmission Plant near Cincinnati, Ohio

[edit]
FMX
An improved version called FMX, which used stronger MX-type rotating parts in the smaller FX case; introduced in 1968 and built until 1982 at the Fairfax plant, which closed when the FMX was balanced out. The FMX used a Ravineaux planetary gearset.


The fmx has been used in f-100-350s, fairlanes, mach 1's, behind 302's and 351's, and FE's. Has a cast iron gear gase and alum. bell and tail pieces.