Doesn't sound too serious. You have a speedometer cable that is either
kinked or starting to fray. It grabs on the housing and twists up /
releases making the needle jump.
You didn't say what year, but on the TF trucks, new universal speedometer
cables are available from just about any auto parts store. You just cut
them to length and replace the old one. Also check the cable sheath for
sharp bends or kinks. If there are any, a couple of nylon cable ties in
the right place should relieve them.
Don't forget to lube the cable as it goes in. Also, I used JB weld to hold
the new cable end in place instead of using the crimping tool that came
with the cable. Also, to pull the old one out and put the new one in, it
worked a lot better to disconnect at the tranny, pull the sheath out, and
lay it straight over the radiator support to give the cable a straight shot
in. Also, you will need to feed the cable in from the speedometer end.
Don't know how much of this applies to AD trucks, but they shouldn't be too
different.
Bruce Kettunen
57 3200
Mt. Iron, MN
>While driving home from my bro-in-laws house today, I suddenly heard a
>GRINDING noise and noticed my speedometer bouncing wildly!! It is still
>attached at the tranny. Is this a sign that the cable is broken, or
>could it possibly just come loose from the instrument cluster??? Are
>these cables hard to find if it has, in fact, gave up the ghost? Can't
>wait til spring!!!! Curt Morris
>P.S. Off Subject: My Brother-in-law needs a grille for his 39 Chevy
>Sedan, anybody have any ideas? Thanks!!!
>oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959
oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959
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