[Tigers] Clutch fork.... Still....

Tue Mar 19 11:30:41 MDT 2013

Hi All, 

The original clutch fork is not a particularly precise stamping. I measure 9.47 inches from one fork tip to the center of the dimple. The distance from the other fork tip is 9.53 inches. One could speculate that the distance is/should be 9.5 inches along the centerline of the fork to the midpoint between the tips. 

BTW, the fork does not have any part number on it. 

Gene 

----- Original Message -----
From: "Ron Fraser" <rfraser at bluefrog.com> 
To: "David or Gary" <wwwdg at webtv.net>, johnp at ciseast.com 
Cc: "john procida" <john.procida at gmail.com>, tigers at autox.team.net 
Sent: Sunday, March 17, 2013 6:50:40 PM 
Subject: Re: [Tigers] Clutch fork.... Still.... 

David 
Excellent work! 
Maybe Gene still has his C3AZ clutch fork handy and can measure from the 
fork tip to the center of the clutch rod dimple. 

Ron Fraser 

-----Original Message----- 
From: tigers-bounces at autox.team.net [mailto:tigers-bounces at autox.team.net] 
On Behalf Of David or Gary 
Sent: Sunday, March 17, 2013 5:39 PM 
To: johnp at ciseast.com 
Cc: john.procida at gmail.com; tigers at autox.team.net 
Subject: Re: [Tigers] Clutch fork.... Still.... 

I went through all my parts and unfortunately I don't have a MK1 Tiger 
clutch arm/fork Ford number C3AZ-7515-A. I do have a couple of later arms 
which may help people locate a suitable length arm. I also checked on what 
clutch arms are shown in the Ford Factory Master Parts books. Here is what 
the Ford parts book shows: C3AZ-7515-A 10" (same as Rootes MK1 Tiger), 
C5OZ-7515-A (MKII Tiger 289) this number is NOT in the Ford Parts book 
(mis-print by Rootes?), for the 1965 289 (6 bolt 
bellhousing) Ford shows C5OZ-7515-B 9 1/4" up to date 2/15/68, then for 
2/15/68 up they show C8OZ-7515-B 10 1/2". I have examples of the C5OZ-7515-B 
and C8OZ-7515-B (pictures below) They are almost identical except for how 
they mount on the pivot inside the bellhousing and the tip. The (C5) 1965 (6 
bolt) mounts inside the bellhousing with the same round wire clip as the MK1 
Tiger, the (C8) 1968 mounts with a flat spring clip. Now the actual 
measurements of these clutch fork arms don't match what Ford has listed in 
their parts book, I don't know how Ford measured them, overall length, from 
the fork end to the pivot, or? The C5OZ-B is shown as 9 1/4", the only 
actual measurement which matches is from the tip of the fork to the center 
of the round clutch rod dimple, but the C8OZ is shown as 10 1/2" and this 
arm is almost the same as the C5OZ, the whole arm on the C8OZ is 10 3/4". 
---------------- 
Here is what Ford shows, and my measured actual lengths: 
- 
C3AZ-7515-A (MK1 Tiger) - Ford 10", actual overall, or tip of the fork to 
the center of the round clutch rod dimple? 
- 
C5OZ-7515-A (MKII) not in Ford book, Tiger owners report 9 1/4" (measured 
where?). 
- 
C5OZ-7515-B - Ford 9 1/4", actual 9 1/4" tip of the fork to the center of 
the round clutch rod dimple, and 10 1/2" overall. 
- 
C8OZ-7515-B - Ford 10 1/2", actual 9 1/4" tip of the fork to the center of 
the round clutch rod dimple, and 10 3/4" overall. 
--- 
I think the measurement should be from the tip of the fork to the center of 
the round clutch rod dimple, but the Ford C5OZ-7515-B and C8OZ-7515-B 
measurements don't match (Ford mistake?). 
---------------- 
So, is the (MKI) C3AZ-7515-A Ford 10" actually 9 1/4" or 10 1/2" or ?, and 
close enough to the 6 bolt non-Tiger C5OZ-7515-B 9 1/4". Since the Ford 
parts book measurements don't match all actual measurements, I think the 
Ford 6 bolt 9 1/4" arm C5OZ-7515-B should also work on the MKI. Also is the 
Tiger Parts book 6 bolt MKII arm C5OZ-7515-A a misprint, and is it actually 
a C5OZ-7515-B? or is it something special? Boy is this confusing :) 
--------- 
For John all the arm measurements. L= 10 1/2, IN= 1 11/16, CC= 2 3/8, SE= 4 
1/16, SD= 5 1/8, SP=? 

David Franchi 

Rear view 68 at top 65 bottom. 
http://pic20.picturetrail.com/VOL1283/13544377/24318096/405952400.jpg 

Front view 68 at top 65 bottom. 
http://pic20.picturetrail.com/VOL1283/13544377/24318096/405952401.jpg 

65 arm on top of the 68 
http://pic20.picturetrail.com/VOL1283/13544377/24318096/405952402.jpg 

65 on top of the 68 close-up of the tip 
http://pic20.picturetrail.com/VOL1283/13544377/24318096/405952403.jpg 

Side View 
http://pic20.picturetrail.com/VOL1283/13544377/24318096/405952404.jpg 
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