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Author
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Topic: is an FMX worth my time?
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fastbigblockford
Journeyman Posts: 87
From: Elizabeth, WV USA
Registered: Dec 2004
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posted 01-01-2005 01:10 AM
   
my mustang came with an FMX that is in pretty sad shape, metel shavings all through the trans. my question is should i even mess with rebuilding it?? motor isnt gonna be anything real special, just a stout(i hope) little 302. only thing special about the car will be the 4.10 gears to help the small block get the old boat outta the hole.
thanks in advance
Dan
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Scott (69Mach)
Gearhead Posts: 734
From: Walnut Creek, CA USA
Registered: Jun 99
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posted 01-01-2005 01:53 AM
If you're not doing a restoration, I'd ditch it for a C4. A C4 is a more efficient and lighter transmission.
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clevelandstyle
Gearhead Posts: 1035
From: Connersville, IN
Registered: Jul 2001
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posted 01-01-2005 02:34 AM
Ditto. /\------------------
Ben
Grabber Green '70 Mach I 351C 4V
Robbin Egg Blue '79 Fairmont 408C 4V, best time to date is 10.50 best MPH 127
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wrksnfx
Gearhead Posts: 193
From: Warren,MI,Macomb
Registered: Sep 2004
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posted 01-01-2005 04:30 AM
I have a FMX tranny in my 79 Ranchero and they will handle up to a stock 351Cleveland engine.
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kid vishus
Gearhead Posts: 6098
From: middle of NC
Registered: Oct 2000
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posted 01-01-2005 09:41 AM
quote:
Originally posted by wrksnfx:
I have a FMX tranny in my 79 Ranchero and they will handle up to a stock 351Cleveland engine.
A properly built c4 will handle about as much power as you can throw at it. I ran high 9's with a c4 behind a fairly stout 351 cleveland without any problems. If I knew my chassis would handle the starting line ratio, I would use my c4 behind my 402 inch clevor, but I'm pretty sure it would try and twist the car in two right off the line. 
C4's have good aftermarket support now, and FMX's don't. Add that to the weight difference, and the amount of power the fmx absorbs as opposed to the c4, and swapping to a c4 looks like a no brainer.
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stroker man
Gearhead Posts: 216
From: Denville NJ USA
Registered: Mar 2002
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posted 01-01-2005 10:01 AM
i made the switch to c-4 from fmx, never look back.
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Moneymaker
Administrator Posts: 25883
From: Lyons, IL, USA
Registered: May 99
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posted 01-01-2005 10:02 AM
C-4 is easier to hop up and takes far less horse power to drive.------------------
Alex Denysenko
Co-Administrator and Moderator NHRA/IHRA/SRA member and licensed Superstock driver
MCA member# 53321
NHRA and IHRA SS/LA & SS/MA National Record Holder '00,'01,'02,'03,& '04
First SS/MA in the TENS!
IHRA division 5 Superstock Champion
Fleet of FoMoCo products including 88 ASC McLaren Mustang #28 The Barry of BarrysGrrl Quote #1: "I never met a magazine mechanic I liked."
Quote #2: "Make sure brain is in gear before engaging mouth!"
Quote #3: "If you can't run with the big dogs, stay on the porch!"
www.moneymakerracing.com
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popeye
Gearhead Posts: 222
From: Dixon, IA USA
Registered: Dec 2002
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posted 01-01-2005 10:31 AM
PUT THE FMX IN THE CORNER OF THE GARAGE JUST IN CASE YOU EVER NEED A HUGE BOAT ANCHOR AND GO WITH THE C4 AND DON'T LOOK BACK. 
I,HAD MY BEST ETs with a c4 and we started with an fmx...I asked my tranny builder what he thought about the FMX. Don't waste your money....period!!!
Another plus is there is a good chance you could find good used aftermarket parts like a manual valve body and torque converter  ------------------
This is FORD COUNTRY, where on a quiet night, you can hear a chevy rusting
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