FMX slipping

[Thin Lizzy 37]

Hi All,

I've found out my FMX trans is slipping on my 69 351w.  Would explain the increased fuel consumption.  It still drives ok but the engine is working harder under revs.

Is it worth rebuilding the FMX or buying a better none standard C4?

Thanks for any help you can give.

Mark

http://www.fordmustangmach1.com

[barnett468 418]

an fmx is fine unless you plan on racing it . i would get the wide band and you might need the wide drum for it and use red alto bands and clutches.

[Thin Lizzy 37]

Thanks for your reply.  I'm not planning on racing it so I'll get it rebuilt.  Thanks for the info about the wide band etc.

[Max Power 74]

Converter selection is limited, replacement pans are "good luck", they are heavy, but with a decent shift kit, they work great.

[barnett468 418]

10 hours ago, Thin Lizzy said:

Thanks for your reply.  I'm not planning on racing it so I'll get it rebuilt.  Thanks for the info about the wide band etc.

that band makes a good amount of difference.

if you want a convertor with a higher stall, one of the places i suggest is below . they have other trans parts as well . a stock fmx with the wide band and good clutches and set up tight will shift fairly solid . no need for a shift kit unless you like to get on it fairly often.

http://www.broaderperformance.com/ford-fmx/164-fmx-10-forged-series-torque-converter.html

 

 

 

[lanky 44]

For the cost involved with rebuilding the FMX, plus the fact that many shops don't work with them as much as they do c4s, c6s, etc I would shoot for a 4r70w swap. Your existing flexplate and crossmember should work. You would need a controller and a TP cable but you would be getting a fantastic transmission with overdrive built in. I almost did this swap before going with a toploader. Use the search function, lots of info here and on google/other forums.