Originally Posted by mmerlinn
The FMX is almost bullet proof. It is one of the best automatics Ford ever made. How do I know? I would starve to death if I sold only FMX parts since I have seldom sold more than ONE FMX part in any year of the last 30 years. C4 parts put food on my table day after day, month after month, and year after year.
It is heavy, for sure, about 40 pounds heavier than a C6. But it has less parasitic drag than either the C4 or the C6, so you get more horses to the wheels.
i think the fluid in the one in my 69 torino is from the factory. i'm scared to change it and i like the way it shifts. i'm going to agree with merlin. it must be a really tough transmission and i wasn't impressed with the c4 in my cougar.
the c6 in the 59 seemed pretty impressive but i don't know what mods it may have had (shift kit, stall).