76-78MPH Vibe..
#1
76-78MPH Vibe..
Ive read on here before about this mysterious vibration that comes on at like 76mph and then fades away at about 78-80. My truck has done this since i purchased it. I have changed front shaft, rear joint, flex coupler, all tires, shocks, t-case with no change in this vibration.i do howevernotice that it seemsto beless intense if at this speed the windows are down.Is it thatmost owners neverget to this speed and its more common than not? or theaerodynamics of this truck at this speed make it shake a little?Any ideers??
#2
RE: 76-78MPH Vibe..
Mine does it at about the same speed but mine started after
I had the tires balanced.
If you have a off-road tires you could get the road force test done to see if you have a tire that is out of round or rolls much different than the others the road force test will tell.
I had the tires balanced.
If you have a off-road tires you could get the road force test done to see if you have a tire that is out of round or rolls much different than the others the road force test will tell.
#4
#6
RE: 76-78MPH Vibe..
well for a while i was making 6+hour trips up the eastcoast and the whole nj turnpike travels about 80, then going south like through north carolina they move through there as well. and its bad on gas any way you look at it, but more importantly i doubt they sold the truck like that.whether i drive at that speed again i still like to gather input about what causes it.
#7
RE: 76-78MPH Vibe..
I agree that the truck shouldnt shake at any speed. Mine doesnt, it wanders, but does not shake.
You have already done everything that I would do to try and find the problem.
But for the sake of argument, 500 miles one way at 75 will cost approx. 36 gals of gas and take approx 6.5 hours.
Same trip at 65 uses approx. 28 gals of gas and take approx. 7.5 hours.
That is a difference of approx. 8 gals of gas and at $2.50 per gallon it will cost you 20 more to drive 75 vs 65.
So round trip costs you $40 more but saves you two hours.
When gas goes back up to $4.50 per gallon, then it will cost you $36 one way, $72 round trip.
You can do what you want, but personaly, I would rather spend that money on something other than gas.
You have already done everything that I would do to try and find the problem.
But for the sake of argument, 500 miles one way at 75 will cost approx. 36 gals of gas and take approx 6.5 hours.
Same trip at 65 uses approx. 28 gals of gas and take approx. 7.5 hours.
That is a difference of approx. 8 gals of gas and at $2.50 per gallon it will cost you 20 more to drive 75 vs 65.
So round trip costs you $40 more but saves you two hours.
When gas goes back up to $4.50 per gallon, then it will cost you $36 one way, $72 round trip.
You can do what you want, but personaly, I would rather spend that money on something other than gas.