Jumpy speedo?
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Fleet Mechanic
Joined: Jan 2012
Posts: 1,668
Likes: 13
From: Saskatchewan
Jumpy speedo?
Hi guys, the speedometer on my 79 f150 has always been very jumpy especially at slower speeds. Do I have to change the speedo or is there some other fix for this. Thanks in advance.
Posting Guru
Joined: Mar 2002
Posts: 1,876
Likes: 6
From: Wolfforth
If that doesn't work, check the little gear in the tranny housing. Could be a fubared tooth. White lithium grease is what I use. they tell you that it is pregreased from the parts house but it's not enough...
Cargo Master
Joined: Nov 2011
Posts: 3,354
Likes: 48
From: Great American SouthWest
The brown truck is also like that. Nothing at all until about 20 mph, then the needle catches up.
NumberDummy suggests graphite lube for the speedo cable. I'm not yet ambitious enough to do that.
NumberDummy suggests graphite lube for the speedo cable. I'm not yet ambitious enough to do that.
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hedgeapple
1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks
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Aug 4, 2004 01:52 AM
