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Author
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Topic: fmx
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stretracer19
Journeyman Posts: 47
From: bowling green kentucky
Registered: Dec 2001
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posted 02-14-2002 05:49 AM
   
hey guys can any one help me out will an fmx tranny hold up under a built engine making between 400-500 hp and does anyone make a shift kit for it i can't seem to find one
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Dave Gibson
Moderator Posts: 7549
From: Norfolk, Virginia, USA M&M#166 MCA#47921
Registered: Aug 99
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posted 02-14-2002 08:00 AM
You will be happier with a built C-6 than an FMX slush box. Just my opinion.  Dave & Terri ------------------
Poison Ivy (Dave's)
'65 Fastback Modified 289 4V, C-4, dual exhaust, styled steel wheels, rally pac, A/C
Blue Belle (Terri's)
'66 Coupe, Silver Blue Metallic, 351W 2-V, 4 speed, A/C, future sleeper.
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stretracer19
Journeyman Posts: 47
From: bowling green kentucky
Registered: Dec 2001
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posted 02-14-2002 08:20 AM
well what i really want is a stick i was thinking of a tremec TKO 2 but can't aford it right now i was kinda hoping it'll just hold up long enough for me to get the money together
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SteveLaRiviere
Administrator Posts: 33988
From: Saco, Maine
Registered: May 99
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posted 02-14-2002 10:30 AM
TransGo sells shift kits for them:
http://www.txchange.com/sk.htmThe FMX in my '72 has seen lots of abuse, and the FMX in my '70 appears to be original. ------------------
'70 Mustang Mach 1 M code 351C 4V/FMX/3.25 open
'72 Mustang Sprint Coupe 351C 4V/FMX/4.30 Trac Lok
'94 F-150 XL 5.8L/E4OD/3.55 Limited Slip
'97 Probe GTS 2.5L DOHC
MCA Member # 47773
Recycle --- Restore a Classic Mustang!
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Moneymaker
Administrator Posts: 19751
From: Lyons, IL, USA
Registered: May 99
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posted 02-14-2002 10:32 AM
Best way to make a FMX hold up behind 400 to 500 HP is to replace it with a JPT C-4.  ------------------
Alex Denysenko
Co-Administrator and Moderator
NHRA/IHRA/SRA member
NHRA and IHRA SS/LA National Record Holder '00, '01, & '02
Fleet of FoMoCo products including 88 ASC McLaren Mustang #28
Part time secret agent license #0089
US Class Nationals link
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stretracer19
Journeyman Posts: 47
From: bowling green kentucky
Registered: Dec 2001
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posted 02-14-2002 11:08 AM
like i said i only want it to last long enough to get a stick but i have seen fmx's behind police interceptor 460 big blocks which i know still isn't making anywhere close to my power but it still should be pretty strong[This message has been edited by stretracer19 (edited 02-14-2002).]
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Moneymaker
Administrator Posts: 19751
From: Lyons, IL, USA
Registered: May 99
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posted 02-14-2002 11:56 AM
FMX and 460 PI??? Not in my lifetime. All C-6's from the factory with HD trans coolers my friend.  ------------------
Alex Denysenko
Co-Administrator and Moderator
NHRA/IHRA/SRA member
NHRA and IHRA SS/LA National Record Holder '00, '01, & '02
Fleet of FoMoCo products including 88 ASC McLaren Mustang #28
Part time secret agent license #0089
US Class Nationals link
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Clark
Gearhead Posts: 592
From: Rowlett,Texas
Registered: Aug 99
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posted 02-14-2002 12:08 PM
Put a shift kit in it if you want and it will hold up to the HP. I have a kit in mine and no complaints. The C6 and FMX are very similar except for the cast iron mid section. Save up for the tranny you want when its time for a rebuild. ------------------
69 351W Sportsroof Deluxe
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Rustang1
Gearhead Posts: 110
From:
Registered: Nov 2000
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posted 02-14-2002 01:00 PM
I've got 3 of those boat anchors laying around that I can't get rid of! How did the FMX come into being? Did it evolve from the 2 speed from the early 60's? And besides the weight, why are they such a terrible transmission? ------------------
1968 Mustang,Clevor,C4
1969 Torino 351C 4spd
1978 F150 460 C6
1978 F150 351W C6
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70SportsRoof
Gearhead Posts: 777
From: Phoenix, AZ
Registered: Dec 2001
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posted 02-14-2002 02:07 PM
I've never had a problem with the FMX in my '70. It has held up well to a lot of abuse that I have put it through. I do have a shift kit in mine though, and I'll be adding a trans cooler this summer when I get ready to tear the car down for it's restoration/modification.
I've heard that the FMX is a version of the old Ford-O-Matics from the late 50's. ------------------
1970 Deluxe SportsRoof (63B), my new toy a '66 fastback 289-4 spd,(2)46 Ford trucks, 47 Ford truck, 57 Ford Fairlane 500 4dr, '72 Olds Vista Cruiser, '88 Bronco II...you can never have too many cars
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Moneymaker
Administrator Posts: 19751
From: Lyons, IL, USA
Registered: May 99
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posted 02-14-2002 03:36 PM
OK, OK, history lesson time.
FoMoCo did not have a 3 speed automatic in the 50's so they had to buy HYDRO's from GM for their premium cars like Lincolns. SO did other car companies like Studebaker, Packard, Nash, etc. There was obviously a market out there for a "universal" three speed automatic. Borg Warner saw that need and developed a universal cast iron 3 speed that could be bolted up to a multitude of bell housings like a stick trans. Hence, the FMX was born although called a T something by Borg Warner. It was evolved into a weaker aluminum unit also for use behind six cylnders and used by AMC throught the late 70's. Borg Warner sold a ton of them to everyone and eventurally FoMoCo bought up the tooling and began to produce them. They were a cheap workhorse trans for FoMoCo many years. The performance market never caught on to them as they were never a good basis for racing. Very heavy and a poor fluid circuit. By 1966 the C-4 and C-6 was out and was well on their way to dominating FoMoCo's auto trans needs. ------------------
Alex Denysenko
Co-Administrator and Moderator
NHRA/IHRA/SRA member
NHRA and IHRA SS/LA National Record Holder '00, '01, & '02
Fleet of FoMoCo products including 88 ASC McLaren Mustang #28
Part time secret agent license #0089
US Class Nationals link
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70SportsRoof
Gearhead Posts: 777
From: Phoenix, AZ
Registered: Dec 2001
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posted 02-14-2002 04:53 PM
Ford didn't have a true 3 speed in the '50's, but something like it. The way their early auto trannys shifted was a 2-3 shift. They would start out in 2nd gear, but by doing a little shift on the column you could get them to start out in first gear, so you'd have a 1-2-3 shift. They never started in 1st automatically, but would end at 1st when you came to a stop. The only reason I know this is from some old timers. I have tried this on my '57 Ford with a 312 and Ford-O-Matic, but found it's too much trouble to do all the time.------------------
1970 Deluxe SportsRoof (63B), my new toy a '66 fastback 289-4 spd,(2)46 Ford trucks, 47 Ford truck, 57 Ford Fairlane 500 4dr, '72 Olds Vista Cruiser, '88 Bronco II...you can never have too many cars [This message has been edited by 70SportsRoof (edited 02-14-2002).]
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joe
Gearhead Posts: 517
From: Los Angeles
Registered: Feb 2001
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posted 02-14-2002 05:15 PM
Love these history lessons.
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Rustang
Gearhead Posts: 504
From: Clarion PA
Registered: Nov 2000
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posted 02-14-2002 09:12 PM
Thanks, Proff!
I knew Alex would come through on that question!
One comment...I hope I didn't offend Sportsroof on calling the FMX terrible, I meant to say that it has a terrible reputation. I really don't ever recall anybody really having problems with their FMX's, it's just that it's always been treated like an ugly stepchild and I never fully understood why.
------------------
'68 mustang 351 clevor- 10.92@124
'67 Stang, 351W -11.18@118
'69 351C Torino-14.90@100
'78 Pickup 351W-15.56@88
'79 Pickup 460 ET=??
http://www.rustang-racing.cityslide.com/contents/contents.cfm/712231 [This message has been edited by Rustang (edited 02-14-2002).]
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70SportsRoof
Gearhead Posts: 777
From: Phoenix, AZ
Registered: Dec 2001
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posted 02-14-2002 10:17 PM
No offense taken Rustang. I've heard a lot of people saying the FMX's aren't the best trans Ford had. I agree, it isn't the best, I just want everybody to know that it isn't that bad as most people make it sound. A C-6 is better, in fact I'm going to use a C-6 in my '46 truck when I drop in the 429. No offense taken Rustang ------------------
1970 Deluxe SportsRoof (63B), my new toy a '66 fastback 289-4 spd,(2)46 Ford trucks, 47 Ford truck, 57 Ford Fairlane 500 4dr, '72 Olds Vista Cruiser, '88 Bronco II...you can never have too many cars
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bluetech
Gearhead Posts: 254
From: Far and Away
Registered: Feb 2001
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posted 02-15-2002 09:38 AM
b quote:
Originally posted by stretracer19:
right now i was kinda hoping it'll just hold up long enough for me to get the money together
Please tell me if I'm wrong about this. I think that as long as you don't put that 400-500hp on your FMX, it will hold on just fine. The way I understand it is that you just want to hold on till you get enough money to replace that FMX. So just use the car w/out going overboard on the FMX limitations(w/c it has) and I think you'll be fine. I think the amount of hp you deliver or channel to your FMX will largely depend on you. Even if you have a 1000hp engine doesn't matter if you don't decide to use it. Am I right along these lines guys?
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ccode67
Gearhead Posts: 1697
From: douglasville,ga,usa
Registered: Mar 2001
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posted 02-15-2002 09:45 AM
The right foot is directly connected to broken parts. Hey if you need a spare FMX let me know, free if you pay shipping, hernia not included.
------------------
Stuart MCA #48902
M&M #1091
67 stang 5 speed, soon to be 351W
91 f-150 xlt
98 explorer xlt sohc v-6
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Moneymaker
Administrator Posts: 19751
From: Lyons, IL, USA
Registered: May 99
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posted 02-15-2002 10:55 AM
FMX can last indefinatly as long as you drive it normally and use a cooler. ------------------
Alex Denysenko
Co-Administrator and Moderator
NHRA/IHRA/SRA member
NHRA and IHRA SS/LA National Record Holder '00, '01, & '02
Fleet of FoMoCo products including 88 ASC McLaren Mustang #28
Part time secret agent license #0089
US Class Nationals link
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stretracer19
Journeyman Posts: 47
From: bowling green kentucky
Registered: Dec 2001
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posted 02-15-2002 12:20 PM
that's the problem i got a heavy right foot and it don't take much to get me into race especially if it's to show up one of the riceboys
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70SportsRoof
Gearhead Posts: 777
From: Phoenix, AZ
Registered: Dec 2001
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posted 02-15-2002 12:49 PM
Maybe I've just been lucky, but I've never had any problem doing a little street racing with my FMX. Of course I don't have a big block in my car, just a mildly built 351W, but the thing pulls hard and has never let me down. But, like I said, maybe I've just been lucky.------------------
1970 Deluxe SportsRoof (63B), my new toy a '66 fastback 289-4 spd,(2)46 Ford trucks, 47 Ford truck, 57 Ford Fairlane 500 4dr, '72 Olds Vista Cruiser, '88 Bronco II...you can never have too many cars
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