• 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5
FMX Crossmember / Shifter Linkage (HELP!!)
#1
I need help.

I have a 73 Mach 1 / 351w / FMX Trans. Nearing full restoration. I had the FMX trans rebuilt. I installed it the other day without a problem. Today i went to put the shifter linkage on and it just does not seem to fit. It seems to be right up against the crossmember. I know i have the correct linkage arm. I also have a linkage arm for a c6 that i had laying around. It also does not fit.
DIZA-7340-AA (Almost positive FMX)
D1ZA-7340-CA (C6)

Ok the crossmember comes into question. I have been reading that there are differences in between the C6 and FMX cross members. The 351w and FMX that i have in this 73 Mach 1 came out of a 70 Coupe that i bought a long time ago. The motor and tranny are not numbers matching for the coupe that it came out of. Castings on the motor and tranny are D2. The crossmemeber from that 70 is the one that i am using in the 73 mach 1.

When i purchased this 73 mach 1, it came with a 351/400mod with a C6. (obvisously not matching) I still have that cross member. IT looks identical to the one that i put in the 73.

I have seen pictures of crossmembers that have two holes in them where the mount would bolt up. I alos have seen an identical looking cross member with 3 holes. Both cross members that i have have 3 holes.

SOme people list them for sale as: C6/FMX crossmemeber
C6 Only
FMX Only

Are there differences between the c6 and FMX crossmembers for 71-73 mustangs???

Do i have the correct shift linkage?
Someone please help.
  Reply
#2
Here are the two styles


Attached Files Thumbnail(s)
   
  Reply
#3
Thats showing a 4 speed and a c6 automatic. What about the fmx?

"Do it once, do it right!"
  Reply
#4
http://cgi.ebay.com/ebaymotors/1971-73-M...2312702854
  Reply
#5
The FMX uses the 3-point crossmember. While the 3 speed manual and the C-4 uses the 4-point crossmember.
  Reply
#6
Correct. the ebay auction that Tnfaskbk posted is the same on that i have. Doesnt the c6 crossmember also have 3 points? Because im under the impression that the fmx and c6 crossmemebers look similar but are slightly different. Also notice the 3 holes in the one on ebay. i have also seen this crossmember with 2 holes in the center. So if the one listed on ebay is the one that i have, do i have the right one? The transmissilb is installed with zero fitment issues. Just having problems with the shifter linkage

"Do it once, do it right!"
  Reply
#7
Here is a picture of an FMX ? crossmember that I have. As you can see, it has been altered in it's past. It also has no number. It came out or a 1973 Q code.


Attached Files
.jpg   FMX Transmission Crossmember.jpg (Size: 25.61 KB / Downloads: 126)
  Reply
#8
Not sure but I thought I read somewhere that the C6 and FMX cross member are the same and you just turn them around for each respective trans?

73 conv. 460, D0VE large valve heads, Performer RPM manifold, Voodoo 227/233 cam, Holley 950 HP carb, C6 trans, 3.25 trak-loc.
  Reply
#9
Yes that is the cross meember i have. Im an idiot. Check out my new post entitled FMX Shift Lever swap. I took a look at my friends 73 Mach1 today w/ FMX. His shifter arm coming out of the trans is completely different than mine. My FMX is a 72 but it is not out of a mustang. Ill post pictures. I need to find the correct Shifter arm mechanism for my trans. Thank you guy so much for all of your help
  Reply
#10
mikepasquale1;30406 Wrote:Yes that is the cross meember i have. Im an idiot. Check out my new post entitled FMX Shift Lever swap. I took a look at my friends 73 Mach1 today w/ FMX. His shifter arm coming out of the trans is completely different than mine. My FMX is a 72 but it is not out of a mustang. Ill post pictures. I need to find the correct Shifter arm mechanism for my trans. Thank you guy so much for all of your help

You're not an idiot. We all do stuff like that sometimes.
  Reply
Share Thread:  


Possibly Related Threads...
Thread Author Replies Views Last Post
  FMX transmission shifter seal replacement how to mach1000 13 3,974 06-21-2018, 03:56 AM
Last Post: summerboy
  Toploader Crossmember Question Studdley 11 398 04-19-2018, 07:43 AM
Last Post: Studdley
  Shifter bucket to body seal Omie01 1 276 12-12-2017, 08:48 AM
Last Post: rackerm
Wrench 73 shifter bushing replacement John J 3 598 05-24-2017, 03:11 PM
Last Post: will e
  FMX Transmission Leak Bell Housing parforever 11 3,337 11-16-2016, 12:49 PM
Last Post: mreddie72
  Linkage Problem 73Lee 4 495 10-10-2016, 05:05 PM
Last Post: 73Lee
  Rebuild FMX video complete Kolbjorn 2 807 09-08-2016, 01:28 AM
Last Post: mus72
  Fmx gearbox Big dog 4 865 07-15-2016, 02:33 AM
Last Post: luxstang



Users browsing this thread: 1 Guest(s)