ok whell it just started happening.. the rpm and mph gauge keep jumping the rpm isnt as bad as the mph i mean i hit 120 n it bounces to 140 real quick then back to 120 n keeps hoppen around.. its just driving me crazy even at normal speeds... anyone got any ideas on what this could be????

 

It's common to have bad solder joints in the tach - this has been covered before, that will make the tach jump around. Most likely a similar problem with the speedo.

Dale

 

ok thanks for that info now how to fix it ?

 

Remove it and look for cold solder joints.

Or replace the whole cluster.

 

umm is there a write up on how to take apart the dash then?