one more Question on Speedometer

[black_demon69]

ok i have got my speedometer fixed and calibrated to within .5 mph fast..

problem is when i'm going 70 to 80 mph and hit a bump speedometer jumps to 85 mph and slowly comes back down to where it should..

i have replaced speedometer drive gear, speedometer driven gear, and speed sensor. i have cleaned and lubed speedometer cable and cleaned lubed gears on the back of speedometer..

any ideas

i have read somewhere on this site about symptoms and fixes specifically related to speedometers but don't recall this symptom in the list and can't remember where i read it. (you know old age )

 

[straycat]

Use the search function and see what comes up. It is old age with the truck causing the issue...lol

 

[black_demon69]

read this sticky and my only guess is a bad speedometer cable what do you think??

http://www.therangerstation.com/forums/showthread.php?t=18170