speedometer
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New User
Joined: Mar 2002
Posts: 3
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From: columbia usa
speedometer
I have a '79 F-100 Custom with 180K miles on the frame. Recently the speedometer went wild and has begun to go erratic, squeaking, etc. I took the instrument cluster out to see if I could see any obvious problems, but didn't find anything broken. I have been told that the inserts for the speedometer are plastic and will wear out.
Has anyone had any experience with this? Where can I find an exploded view or a description of how to work on it?
Any help will be appreciated. Thanks.
Brian Christiano, P.E.
Has anyone had any experience with this? Where can I find an exploded view or a description of how to work on it?
Any help will be appreciated. Thanks.
Brian Christiano, P.E.
Fleet Owner
Joined: Jun 1999
Posts: 24,552
Likes: 74
From: Creedmoor, North Carolina
speedometer
Brian, lube the cable end with white lith. grease. Should take care of it. 
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John
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In the cool still quiet of night, you can hear chevies rusting away.
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John
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In the cool still quiet of night, you can hear chevies rusting away.
Freshman User
Joined: Dec 2001
Posts: 28
Likes: 0
From: F'burg
speedometer
Mine stopped working like that. All looked good on the dash end, and when I unhooked the cable from the transfer case, gave the cable a spin, and the needle worked fine. But in the tran case, the plastic gear threads were etched away. Unhooked the U-joint of the drive shaft, removed the bolts and bearing and the plastic gear slid right out. The new part cost me $40. Quite a bit for a plastic gear. But thats what it was.
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Freshman User
Joined: Jan 2002
Posts: 31
Likes: 0
speedometer
Im trying to find the right plastic speedometer gear for my 79 ford f-150. Had like a 273 rear in it with the right gear, know has like a 350 rear, whick is the stock rear, but no pastic gear, at 70mph my speedometer is pointing straight down, whats the deal???
New User
Joined: Jan 2008
Posts: 0
Likes: 24
speedometer
The speedo gears are colour coded for each ratio.
You need to find out the colour for 3.50 gears.
Dennis https://www.ford-trucks.com/user_gallery/sizeimage.php?&photoid=1733&.jpg
[i][font color=red]Calgary,Alberta,Canada[/font][i]
[font color=blue]Please Don't Ask Me Any Tough Questions,
"I'm Saving My Memory For When I Develop Alzheimer's" [font/]
78 F-150 429CJ,Silver, Explorer Pkg.
641/2-Mustang 260,Pre-World's Fair Car.
64-Fairlane500 S/C waiting for a 390-4spd.
68-Mustang 289-Sunlit Gold 80,892Mi
78-Buick LeSabre 403 4V
84 Volvo DL Wagon
You need to find out the colour for 3.50 gears.
Dennis https://www.ford-trucks.com/user_gallery/sizeimage.php?&photoid=1733&.jpg
[i][font color=red]Calgary,Alberta,Canada[/font][i]
[font color=blue]Please Don't Ask Me Any Tough Questions,
"I'm Saving My Memory For When I Develop Alzheimer's" [font/]
78 F-150 429CJ,Silver, Explorer Pkg.
641/2-Mustang 260,Pre-World's Fair Car.
64-Fairlane500 S/C waiting for a 390-4spd.
68-Mustang 289-Sunlit Gold 80,892Mi
78-Buick LeSabre 403 4V
84 Volvo DL Wagon
