63mph vibration

[gstanfield]

I've noticed that my truck has a bit of a course vibration at 63mph. It is the same regardless of acclerating, decellerating, coasting in nuetral or whatever. I haven't started tracking down this yet, thought I'd ask here first and see where you recommend I start looking. It is odd as it is only at this exact speed, and goes away as soon as I slow down or speed up.

Thanks,
George

 

[RacinDuallie]

Where do you notice this in the steering wheel or in your seat?

 

[gstanfield]

I think it is everywhere, like Santa. I'll pay more attention next time I'm out, but I.m pretty sure I feel it in the wheel and the floor and probably the seat as well.

George

 

[moneymaker44]

I have heard of a slight unbalance in the drive line doing this check you drive shaft a bearing if it has one.