After i recently replaced two broken CV joint boots, the steering column starts shaking at around 60mph. but it ceases under 55 and over 70mph. My mechanic did a wheel-balance hoping to solve the issue, but it's still the same.
what could be the cause? will out-of alignment wheels cause such problem?
I also suspect it's aero-dynamic in nature, but don't know where to look at. Any ideas?
thanks a lot. Ben