Hi all,
I have a 2005 dodge magnum 2.7 and There is this weird shake in the rear end.
to answer some basic questions that immediately come up:
shes got 180k on her.
yes all tires are balanced.
none of the lugnuts are loose.
tires are 6 months old and do not have any bubbles in the tread.
alignment is good.

so here's the issue, When I am cruising (one constant speed, not on cruise control) between 40-50MPH, it feels like the rear end is shaking, not hard (like i'm going over rough patches on the road). if i let off the gas or accelerate, the shake stops. it does not shake under 40 or over 50mph.
so any one got any ideas of what is going on?