Diagnosing a speedometer problem
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New User
Joined: Dec 2004
Posts: 14
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From: London, Ontario, Canada
Diagnosing a speedometer problem
Hey:
My first posting! I'm excited about finding this resource. What a great idea.
My '49 Merc p.u. had the speedo quit. The real question is, how to a diagnose where the problem is: easy enough to check the cable itself, but how do you know if the problem is at the tranny or the speedo?
The cable is a square end of type 8C-17260-A.
My first posting! I'm excited about finding this resource. What a great idea.
My '49 Merc p.u. had the speedo quit. The real question is, how to a diagnose where the problem is: easy enough to check the cable itself, but how do you know if the problem is at the tranny or the speedo?
The cable is a square end of type 8C-17260-A.
Laughing Gas
Joined: Sep 2003
Posts: 1,072
Likes: 25
From: San Mateo, CA
Welcome to FTE! This website is one of my primary resources on these old trucks and there's good people involved. Very little of the posing and mudslinging you see on other forums.
The speedo on my truck is also broken, but I haven't dug into it yet to figure out why. Hopefully somebody who has fixed a broken speedo will chime in and describe the system and we both will benefit!
ROB
The speedo on my truck is also broken, but I haven't dug into it yet to figure out why. Hopefully somebody who has fixed a broken speedo will chime in and describe the system and we both will benefit!
ROB
Senior User
Joined: Jul 2004
Posts: 336
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I had that problem with my 54 it would not stay on one speed it would jump all over it was the speedo gear which is on the end of your cable make sure you count the teeth so you get the right number of teeth you may tray to grease the cable I hope this will help you out.
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New User
Joined: Dec 2004
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From: London, Ontario, Canada
Thanks 54 gene
I've got it.
The speedo gear has been worn down. It engages with a worm gear in the tranny. Any ideas on where I can get a replacement? There's 19 teeth.
By the way Rob; not only do you have to take the cable off at the tranny, but you also have to remove the threaded end that the cable attaches to.
I've got it.
The speedo gear has been worn down. It engages with a worm gear in the tranny. Any ideas on where I can get a replacement? There's 19 teeth.
By the way Rob; not only do you have to take the cable off at the tranny, but you also have to remove the threaded end that the cable attaches to.
Lead Driver
Joined: Apr 2002
Posts: 8,813
Likes: 13
From: Littleton, New Hampshire
Originally Posted by dawsrobe
Thanks 54 gene
I've got it.
The speedo gear has been worn down. It engages with a worm gear in the tranny. Any ideas on where I can get a replacement? There's 19 teeth.
By the way Rob; not only do you have to take the cable off at the tranny, but you also have to remove the threaded end that the cable attaches to.
I've got it.
The speedo gear has been worn down. It engages with a worm gear in the tranny. Any ideas on where I can get a replacement? There's 19 teeth.
By the way Rob; not only do you have to take the cable off at the tranny, but you also have to remove the threaded end that the cable attaches to.
Vern
Senior User
Joined: Jul 2004
Posts: 336
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Dawsrob you can get the part right in Pickering not far from you go to www.fordantiqueparts.com it is called Absolete ford truck parts hope it is a help to you.
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New User
Joined: Dec 2004
Posts: 14
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From: London, Ontario, Canada
Thanks 54 gene
I had seen Pickering on the Net, but their website isn't that informative...so I was curious but not sure. Good idea though. I guess I should get a catalogue.
I had seen Pickering on the Net, but their website isn't that informative...so I was curious but not sure. Good idea though. I guess I should get a catalogue.
