Have any of you ever heard of an FMX transmission for a Ford? At least I think it was FMX. A guy was telling me (I know, I know!), that he built a Ford Pickup years back, and after he burnt the C-4, he installed an FMX transmisson. Said it was like a whole different truck. ANyway, I was just wondering if anybody had heard of one, cause I hadn't('Course that doesn't mean anything, 'cause I'm new at all of this!!) Just curious. Preston
FMX The story I was told, is that the FMX was the predecessor to the C4 on the mid 60's Mustangs. I have a '67 Mustang 289 and "FMX" in my '72 Grabber. When I went in to the parts store with the transmission filter out of the FMX to replace it, I learned that the C4 filter was different. (Naturally that is what I asked for). Anyone else have some knowledge on the subject?
FMX were used in the late 60's early 70's. If you were running a auto and pushing some power through, the FMX was the trans to get. At one time the C4 and FMX were both in the Ford lineup with the FMX as a opt. if I remember correctly. ( At my age there are some things you just can't be 100% sure of. :confused: )
FMX I changed my c-4 tranny out of my first Maverick grabber when I came back from over seas in 1980. The clutches are different in the C-4. The FMX is a total cast iron housing and has bronz clutches.The driveshaft yoke is larger and a minor mod had to be done to the cross-member. My Tranny came out of a mustang
I had one in my 73 ranchero behind a Cleveland motor, and there is one in my 74 Turino behind a Windsor. I have a brand new TransGO shift kit still in the box for one. I think they are often found in the bigger station wagons of those years..
FMX trannies are just a continuation of the "Cruise-O-Matics" found in Fords in the late 50s. I believe they were Fords first 3 speed automatic. The interior of them is bizarre by todays standards, with some steel tubes carrying fluid from one place to the next instead if being built into the casting. They are a cast transmission, as mentioned above, and are heavier than the C-4 0r C-6. Even though they are heavier, I hear thay are not stronger than C-4s, as some of the gearsets and input shafts aren't designed for over 400hp. Not many performance parts exists, except for the occasional shift kits. Most rodders consider installing an FMX into a performance application de-evolution.
By using the later C-4 you are getting the latter part of technology. I.E. availability of parts, more performance mod potential, more economical. The FMX is a great trans and I have owned a few over the years but if I was going to keep an automatic I would stick with the C-4. Dan
yes, the FMX's were tough trannies in their day, and they still are. They just dont have much following in the aftermarket like the c4's and c6's do. The gear train is nearly identical to the GM powerglide in that all the plantetary gears are housed in one carrier. Actually, it's design is fairly close to the AOD, except the AOD has one extra gear and clutch. The only problem with the FMX is that no one makes parts for them, only a shift kit and some factory-replacement clutches. No converters, etc..and when you do find one, it costs a fortune. They are very heavy too, the main transmission case is cast iron and has a heavy cast web in the middle of it.
My 69 Mustang has an FMX in it with a shift kit, but I get a lot of gear whine, it leaks after sitting for a couple of weeks, and I can't wait to do the AOD swap.
