Tranny Conversion - Speedo Cable

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Oct 12, 2010 | 12:59 PM

66shortbed

Thread Starter

Cross-Country

Joined: Apr 2008

Posts: 57

Likes: 1

Tranny Conversion - Speedo Cable

guys, i put a c6 out of 73 f-250 in my 66 slickside. the truck was a 3 on the tree. i connected the exisitng speedo cable to the new trans. and it seemed to fit well. however the needle bounced and emitted a pretty ugly noise until it snapped within the first 20 miles i drove.... which makes me think maybe the cable doesnt work with the trans? i dont know.

question is:
should the 66 manual speedo cable work with the 73 c-6?
if not will the automatci cable for a 66 work?
or, do i need to be looking for a cable out of a 73 and will that work with my custom cab speedo in my 66.

thanks a lot guys. trying to get the truck ready for the winter and order some parts today so i can tie up some loose ends this weekend... any help would be greatly appreciated.

Oct 12, 2010 | 02:18 PM

Old_Crow

Laughing Gas

Joined: Dec 2009

Posts: 938

Likes: 0

From: Bishop, CA

Here's the one I ended up using in my '61 when I did the 302/C6 deal:

Pioneer Inc. CA3010 - Speedometer Cable 1968 Ford F-100 Pickup | O'Reilly Auto Parts

Oct 12, 2010 | 02:33 PM

jowilker

Fleet Owner

Joined: Jun 1999

Posts: 24,552

Likes: 74

From: Creedmoor, North Carolina

66, I think you may have put a right had screw gear into a left hand screw hole, causing it to bind up and it gave up the ghost.

Just a hunch, you might want to look at if you have the other gear.

I don't believe I changed anything but the gear when I converted to a C6, but more than 10 years ago and my forgetter works overtime now.

John