I've greased my cable countless times, i've replaced the speedometer. and i've checked the Speed sensor or whatever you call it in my transmission. but heres the deal.
at certain speeds, usually anywhere between 55-65 or 75-85 my speedo bounces. i have a video of it, but i don't know how to get it off of my phone.
i was wondering if anybody else has this problem in the Cable driven speedo trucks.

 

Mine does it to ive greased the cable a couple times as well. This is just something ive learned to deal with.

 

did you check the speed sensor o top of the pumpkin because mine was doing that same "jump" at all speeds i replaced that sensor and it stopped.

 

mine has doen it for 3 years

 

I checked it, it didn't look to be all that great, and at the time i couldn't order a new one, i'll have to look again.

 

ya i suggest replacing that it only cost me like 12 bucks or something. let me know

 

x2^^