speedometer floating?

[sledgehammer1990]

My XLT is a 5-speed manual and when I get around 55 and above, I am in 5th grear. When I watched the speedometer, I noticed the needle would be floating. When accelerating, if would hit 55 and drop to 65 in a second. When driving, if I were to hit a small bump, the needle would bob up and down. Its hard to tell if im doing 65 or 75.

Any suggestion on how to fix this? Or just replace it.

 

[mikeinri]

This is common, and there is info posted here. I believe the culprit is a bad speedo cable, but you should search just to make sure...

Mike

 

[boggs1227]

they all do it ...mine does it after 65.need either new speedo head / cable / speed sensor gear .

edit: when i had 2 things done to my truck ( transmission rebuid and speedo head removed)
1st... when i had my speedo head out i noticed that the ends of the cable were a little
rounded (where it clips into the head) that made me think that it was the cable.

2nd... when i got my truck back from the shop for my transmission ( after the speedo
head removel time) i noticed that the speedo did not hop any more ...steady as
could be till it started doing it a month later ...makeing methink it was the gear .

hope this helps

 

[SwaintaN]

i have the same problem, but mine only happens mainly when its cold out; which sucks, seeing how I live in Ohio