speedometer and tach bouncing at crusing speed?
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Joined: Apr 2001
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From: Midwest
speedometer and tach bouncing at crusing speed?
1995 f150 5.0 4wd 4r70w auto tranny. I haven't had the truck on a road trip in a couple months,but had to drive about 60 miles last night. I noticed while i was driving about 70 mph the speedometer was bouncing about 5mph and the tach was bouncing about 500 rpms. the truck's engine tone was not changing,so i am pretty certain that the engine was not actually changing rpms. The truck ran excellent other than this. is this something I should worry about and if so what do i need to do to fix it?
