My '56-'57 book shows TAAA 7515B for '56 and B7C 7515A for '57,,,,,10 5/8 and 11 1/4 approx. length respectively

Cool! So it looks like '54-'56 and '57-'64 are different.


Lawrenceville, GA

I agree with Horvaths. Probably for increased leverage. Some trucks had 10.5", 11" and 12" clutches (pressure plate springs were different). Also cars had the big helper spring on the pedal while trucks had the through the floor thigh-master style pedal.

Mark

1956 Mercury M100
1955 Ford Fairlane Club Sedan
Delta, British Columbia

Same casting as mine but I measured with a rule and one eye.

The number is TAAA-7515B. Dimensions are 5 3/4" x 3 3/8". I measured with set of dividers. The fork is from a '56 Mercury M100 witha 272, 11" clutch and a light duty 3 speed trans. Hope this helps

Mark

1956 Mercury M100
1955 Ford Fairlane Club Sedan
Delta, British Columbia

This is from a bellhousing off a B9 block with hydraulic clutch.

I do not know if that would make a difference to the pivot point.

I also do not know how big the truck was.



South Australia

See how it compares to the dimensions we've posted and the number on it.


Lawrenceville, GA

Charlie, I have a '56 clutch fork (at least it came in a "56) in the back shed. I can look at it tomorrow. What would you like me to check?

Mark

1956 Mercury M100
1955 Ford Fairlane Club Sedan
Delta, British Columbia

I looked in my'57-'66 Truck parts catalog and any of those trucks with a Y would have used the same fork, part number B8C-7515-A (The numbers we gave above are engineering numbers), about 11" long, which matches my spare.
I wonder if the other fork is '54-'56?


Lawrenceville, GA

I reason (aloud) that, for a given transmission/bell housing, the distance from pivot to throw out will be the same. Then the distance from pivot to rod could be varied. This would cause a change in rod (pedal) travel, and a change in foot pressure required to overcome a given set of springs in the pressure plate.