FMX/Fordomatic Article


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By Carls56 - 17 Years Ago
      I have a 56 Ford with a 292 and Fordomatic.My starter ring needs replacing ,so I thought I would try the FMX/Fordomatic conversion.I can not find the article.

      Do you guys have a link to it? And would you advice the conversion.Thanks,Carl

 

 

I wanted to add this also.I found someone that has a fmx, he says was bolted a 351W and he will give me the yoke.Does it matter what FMX I use?

By Hoosier Hurricane - 17 Years Ago
Carl:

This was on the old site, but I cannot find it either.  In a nutshell, the FMX can be bolted to the FOM bellhousing by putting the bolts in the bottom two holes and transferring the upper two bolt holes from the bellhousing to the FMX case.  If your FOM has the 29 spline input shaft instead of the 17 spline, you can put the FOM front pump on the FMX and use the original converter.  If your FOM is 17 spline, you either have to find a 29 spline converter or put the 17 spline input shaft in the FMX.  This involves a complete teardown of both trans.  Or you can leave the FMX front pump on and have a special converter built that is Y block on the front and FMX on the back.  This will require a '59 or later flywheel with the starter ring gear on it, as the special converter will be a sealed unit instead of the bolt-together one in your '56.

At the rear, you may have to fabricate a rear mount, and you may have to shorten or lengthen the driveshaft.  Or, put the FOM output shaft and tail housing on the FMX and use the stock mount and driveshaft.  Watch the tail housing gasket very closely in the lower corners, it may not cover the corner and will leak.  Any FMX will work.

John in Selma, IN

By Carls56 - 17 Years Ago
        Thanks so much for your reply.I think I will tell the guy I will take the FMX(he wants 100$ for it).

      I don,t mind tearing into them.Carl

By Carls56 - 17 Years Ago
      I pulled my converter off to see what I have.It looks like a 17.

http://i77.photobucket.com/albums/j46/1954ford/DSCF0195.jpg

Also,Can just get a starter ring and seal for this toque conveter?I just try that first.

http://i77.photobucket.com/albums/j46/1954ford/DSCF0197.jpg

http://i77.photobucket.com/albums/j46/1954ford/DSCF0198.jpg

I will go ahead and make a little confession.......I had this set in to mock up some mounts.

http://i77.photobucket.com/albums/j46/1954ford/DSCF0199.jpg

To put this in.

http://i77.photobucket.com/albums/j46/1954ford/DSCF0200.jpg

And I started to think about just keeping the old y.I guess I better get busy on it too.Smile

http://i77.photobucket.com/albums/j46/1954ford/DSCF0201.jpg

 

 

P.S. I just looked at that starter ring again.I think I am going to try to cut those welds and see if I can,t just flip it around and reweld it.Have any of you tried to do this?

By Gerry - 17 Years Ago
2 Things

One if you use the FMX tail shaft the speedometer cable and geer will have to be changed if you are going into a 56 or older car.

point two,  if you use a low torque starter I don't think you will need to worry about the ring geer and you will end up with a much better starter.  Just my thoughts.  Gerry

By Carls56 - 17 Years Ago
Gerry,Could you give me a link or price for that starter? I just pulled my ring gear off.I thought I would be able to just flip it and re tack it but there are two different sides.

http://i77.photobucket.com/albums/j46/1954ford/DSCF0202.jpg

http://i77.photobucket.com/albums/j46/1954ford/DSCF0205.jpg

I am starting to see why some of you folks just but an adapter.I am not sure if I want to spend that much on the old car.I might go with a different engine after all.

By Gerry - 17 Years Ago
Hi-Test in Santa Ana California 714-540-9600  The web site is  still under construction, but it works. I have done the FMX conversion and it's not a bad way to go. I had to rebuild the FOM so it really didn't cost me much more. Use the FOM tail shaft it will save time and money.  Mu thoughts. Gerry 

http://www.hitestusa.com/

By Hoosier Hurricane - 17 Years Ago
You can if your FOM has a one-way clutch in the middle of the transmission.  This is found in the ones that will downshift to 1st when you floor the throttle from a dead stop.  You also have to use the FMX detent, sometimes referred to as a "rooster comb", and drill and tap the back of the case for the vacuum modulator.

John in Selma, IN

By webconst - 17 Years Ago
Carl, I tried to e-mail and pm you thru this site, neither would work.  I have a 56 converter and flywheel complete in very good shape and 2 flywheels separate.  Attached pic of complete unit. E-mail me at webconst@gte.net, if you want pic's of flywheels.  Might work for you until you can work out FMX solution.  Where are you located.  I am in Central Fl.  Thank you, Charlie

By Carls56 - 17 Years Ago
      Thanks,I will try to email you at that address.Carl
By Carls56 - 16 Years Ago
         Well.................Last week I traded for a 302 and trans for my 54 f100.The trans was covered in grease and I didn,t really look at it.I just thought it was c4.But,when I got it home , I found out it,s a fmx.

         So I am thinking about trying this again.It,s out of a 1976 truck but I don,t know for sure what it might have orginally been from.

        My question is: When searching for a pump and torque converter,What year and model cars and trucks should I look for?(besides the 57-59)

        In other words,when I am looking on craigslist or ebay.What cars and truck should I search? I see fe engines and trans from time to time.Would those have cruiseo,s?

        http://www.y-blocksforever.com/tech/html/fmx_upgrade.html

         I think I am reading the article right ,that you can use a cruiseo pump and torque converter also?

By rexbd - 16 Years Ago
What can you expect to gain from the FMX versus the original tranny?  I have been debating what to do for a tranny in my 55 Tbird.  I am getting closer to making that decision.  I thought about the AOD conversion but that gets pretty expensive pretty fast.  What gains are there from the FMX versus modifying the Cruiseomatic to do the 123 shift using the FMX parts?  Also I have an air cooled tranny now, if jumping to the FMX I assume I need to add a tranny cooler?
By Hoosier Hurricane - 16 Years Ago
Rexbd:

Unless you are going to have a high horsepower engine and racing slicks, there is probably no advantage for you to convert to an FMX, your only gain would be the 1-2-3 shift, which can be done by upgrading the FOM.  The cooler is a good idea, but if you choose the FMX you can put the FOM input shaft and front pump on the FMX and retain your original converter.

By rexbd - 16 Years Ago
I can get the FOM rebuilt and upgraded for around $700.  Seems like a good way to go and keep the car as original as possible.  If I find I want to go on longer trips can always revisit the AOD issue.
By Hoosier Hurricane - 16 Years Ago
Rexbd:

Sounds like the sensible solution.  I doubt if you'll ever drive enough miles to pay for the AOD conversion with fuel savings. 

By rexbd - 16 Years Ago
Getting the fordomatic to perform the 123 shift pattern I assume refers to swaping in some FMX parts and adding the vacum line?
By Hoosier Hurricane - 16 Years Ago
Yes.  You will have to drill and tap the case in the correct location for the vacuum modulator.  Dimension can be taken from the FMX or later COM that has a modulator.