fmx vs C6 vs manual

brainfart3 · Post by **brainfart3** » Thu Mar 27, 2008 9:50 am

67 F250 w/352 & fmx

just driven from Modesto, CA to Phoenix, Az w/o incident. avg 15.2 mpg too

anyway - couple days later went to make a parts run - tranny just slips in forward gears. almost got up to 30 mph!
in reverse - "snaps' right in.
dropped the pan, fluid is badly burnt, adjusted the servo. no change.

story i had was this trans was rebuilt a few years ago but it took them several attempts to "get it right".

considering my options here:
1) rebuild the fmx (with a good tech book)
2) swap in a C6 (also rebuild before install)
3) swap for a manual trans - done several on early mustangs. is the 352 crank drilled or a pilot bushing?

have a line on a complete 390 FE & C6 ... another option..

appreciate your feedback...

sideoilerfe · Post by **sideoilerfe** » Thu Mar 27, 2008 12:59 pm

FMX IN 67 was the Cruise O matic wasn't it? In 65 and 66 they were I'm not sure on 67.

I've had 4 C6s and had trouble with 2. Both of them lost 2nd gear. However, the other two were great. I've never had a rebuilt one or rebuilt one myself but they seem to be pretty good trannies. I'd go the C6 route.

SteveC · Post by **SteveC** » Thu Mar 27, 2008 1:14 pm

yes the 67 has the cruse o matic my 67 f250 has the cruse o matic how ever my 70 ltdwas a fmx. The pans are very similar but set differently. The pan on my 67 sits sideways and is a bear to get off..and my ltd was lenthwise and fairly easy.

Not to mention the cruse o matic the coolent went back to the tranny and the fmx the tranny fluid went to a in radiator cooler.

If i ever run across a 4x4 or 2 wheel 67 with a 4speed im gonna convert over to a manual since they are so much more fun to drive

Brett6269 · Post by **Brett6269** » Thu Mar 27, 2008 2:11 pm

AH yes!!! the cruiseomatic.. my 64 galaxie had one, slushbox city, had nuthin but probs with it had it rebuilt for 650 bucks slipped again 6 mo later.. a c4 or a c6 would be what the doctor ordered!!!! Ide go w/ a c6 if it were me!!!!

like the commercial used to say for fram .. pay me now or pay me later!!!!anybody remember that commercial...

brainfart3 · Post by **brainfart3** » Thu Mar 27, 2008 2:19 pm

thx guys - and yes- i remember the commerical.

long sides of the pan parallel the bumpers. filler tube screws into the passengers side of the pan. and it has a trans cooler.

i'll scour craigslist to see what kind of donor rig i can find.

SteveC · Post by **SteveC** » Thu Mar 27, 2008 3:07 pm

yep that is the cruse o matic all right

brainfart3 · Post by **brainfart3** » Thu Mar 27, 2008 3:40 pm

thx - next series of dumb questions....
C6 - understand i need to look for a big block version.

does year matter?

auto vs truck (mine is 2wd)

anyone know if i'll need to swap the flex plate, torque converter, driveline, etc...

sideoilerfe · Post by **sideoilerfe** » Thu Mar 27, 2008 5:42 pm

Does your Cruise O Matic have a Bolt on flange at the rear or a slip yoke like the the cars? You'll probably need to find a 68-72 FE C6 with the bolt on flange for the U Joint.

Brett6269 · Post by **Brett6269** » Thu Mar 27, 2008 7:48 pm

dude i hope you didnt take it wrong!! i just didnt have a good experience with mine!! they are a good cruising tranny but if yer gonna tow, haul, or get on it ide go with a c6..

brainfart3 · Post by **brainfart3** » Thu Mar 27, 2008 10:19 pm

sideoilerfe - both - i think - there's a portion that slips into the back of the tranny - then a plate that bolts on where the Ujoint is attached.

brett6269 - no worries! didn't take it wrong. will be used as a parts chaser / oldies cruise nite on main / and towing car trailer to/from the dirt track (lincoln towncar in a "bomber" class).

looking like a C6 is the ticket - unless i can find a donor rig w/manual tranny.. just gotta line on a complete 390FE w/C6 .... more later.

again THANKS!!!!

F100builder · Post by **F100builder** » Fri Mar 28, 2008 3:15 pm

I like your line on the 390/C6 and wish I could have found one myself! As it is, I found the 390 and I'm still looking for a good C6! I've already got the 390/C6 combo in my '69 short 2WD now but I want to build up some spares to swap into it later with a few go-fast goodies added! I'd go with the C6 for sure. If they're built right, they are tough and hard to break!

NAFLASH · Post by **NAFLASH** » Sun Mar 30, 2008 11:22 pm

i have a C6 for the 390. needs a tailshaft and obviously a rebuild but other than that your good to go. let me know i basically want it out of my yard. dont know what its worth. 50$?

craftsman · Post by **craftsman** » Mon Mar 31, 2008 6:59 am

brainfart3 wrote:thx - next series of dumb questions....
C6 - understand i need to look for a big block version.

does year matter?

auto vs truck (mine is 2wd)

anyone know if i'll need to swap the flex plate, torque converter, driveline, etc...

Not only just bigblock version, but fe version. The bellhousing for fe is different than any other ford bell.

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fmx vs C6 vs manual

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