Speedometer
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Joined: May 2004
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Speedometer
I have a 79 Ford F-150 and the Speedometer is hosed. The thing works )I think) at lower speed but when you get to 45+ it starts bouncing when you get to 65 it is all the way to where 100+ mph would be. I pulled the cable from the transfer case and looks fine all the teeth are there and are not broken or smushed. Any idea's?
Thanks
Thomas
Thanks
Thomas
Postmaster
Joined: Jun 2003
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From: WA
My speedometer has a weird thing, my tires are bigger than stock, so it of course reads too low of a speed. When it says 50 I am gong 60. But the odometer actually runs faster than it should. Checked it against the mileage markers on the highway, it clicks of just over 1.1 miles for every actual mile. Could someone have monkeyed with a gear in the speedo unit itself trying to get the thing reading right?
Post Fiend
Joined: Jul 2003
Posts: 11,945
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From: Spokane, WA
Never heard of that happening before but I suppose if someone were fiddling with the speedo it's possible. <!I've got a spare if you want to try it, you're welcome to have it for nothing.> You can also reset the odometer if you want and start from zero! 
Laughing Gas
Joined: Apr 2002
Posts: 845
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From: Bakersfield Ca.
Originally Posted by thomasgk
The thing works )I think) at lower speed but when you get to 45+ it starts bouncing when you get to 65 it is all the way to where 100+ mph would be. Any idea's?
Thanks
Thomas
Thanks
Thomas
I put it back in and have had no more problems with it. It registers the same as before as the tachometer coincides with the speedo.
Give it a try. Good luck.
Postmaster
Joined: Jun 2003
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From: WA
Ivan, it would be nice to zero if for the new motor, make it easier to remember when I swapped it 
<! I'll have to get them from you next time I see you>...thanks!
<! I'll have to get them from you next time I see you>...thanks!
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Post Fiend
Joined: Jul 2003
Posts: 11,945
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From: Spokane, WA
Yup, I zero'd mine out for no good reason, just thought it would be fun. <! I'll be home on the 9th so I'll get it to you sometime after that. Until then> no speeding!
<! I'll be home on the 9th so I'll get it to you sometime after that. Until then> no speeding!
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Junior User
Joined: Sep 2003
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it could be the worn gear on the output shaft of the tranny. i've replaced everything but that in mine, and it does the same thing. i don't feel like droppin the tranny to fix it, so i calculated my gear ratios and drive by the tach.
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