When i am driving my lighting and i hit about 55 my speedometer jumps really bad.. And then it causes it to downshift.. I have replaced the abs sensor and had the trans rebuilt and replaced the ring sensor gear and it still does it.. If anyone has any ideas of how to fix this or what to try please let me know.. Thanks alot..

 

Put it on general f150 discussion

 

You might get responses if you put this in the right section and included some info about the truck.