Thanks for your reply. I'm getting all the mounts looked at this morning. I hope it isn't them because finding genuine is probably going to be a mission.
Obviously you have been through it and I appreciate your advice, but would it be likely the noise would change or stop when I put the car in neutral going down a hill at 60 and not stay constant? Rhe revs drop right down to below 1000 and there us no change in noise. It's why I assumed it must be related to suspension or wheels.
Anyway, hopefully I'll have an answer this arvo when I pick up the car and I'll let you know how we went.
Thanks again
The problem I had was in a Vl 5 litre and it was harmonic vibration i.e it comes and goes/drums through the car.
It was so bad the engine reconditioner rep got a headache after driving it for a short time.
It came through the tunnel/ through above your head, almost everywhere and at all speeds.
And FWIW I changed wheels and tyres twice, rebuilt the suspension, had balance and alignment done by 3 businesses etc
This went on for over 2 years.
I spent $1000 with a driveline/gearbox business and they drove the car many times over about 2 months trying to find the problem but eventually said sorry, cannot find it.
I will be happy if I ever see the obituary notice for the mechanic.