Droning Noise in Jackaroo

Hi All,

I have a petrol 1998 V6 3.5ltr Manual Jackaroo, I have it serviced about a month and half ago and also had some heavy duty springs fitted to it and also had the front torsion bars adjusted to match the higher ride height in the back.

This is all fine and I had not driven the car since getting it serviced, however after just returning today from a camping trip and driving since that last service, I noticed that at around 90kph (between 80 - 100kph) there is a very distinct low droning noise.

It is worst at just over 90kph and in 5th gear (manual), that is approx 2200 rpm, and only when the cruising, accelerating or under load, once I remove my foot from the pedal the noise stops, however when placed back on, the deep deep droning noise starts.

Strange though both my wife and kids cannot hear it, however after many hours driving I am nuts from the deep deep noise.

I have checked for the noise in the other gears but at the same RPM 2200 (around that revs) as well as same speeds 80-90 kph but in other gears 4th for example and I cannot notice any noise, it is only under load in 5th gear at around 90kph.

I makes the same noise when towing my camper or not.

I thought the new higher ride height may have caused it but when towing the 1500 klg camper on the back the noise is just the same.

The only thing I thought it could be is a sus gear box, 5th gear or bearing?

Any ideas, suggestions and help would greatly be appreciated.

Also any persons knowing of an honest expert in Jackaroo's in the Melbourne area that I could have check it out would also be of help.

Thanks to all.

Craig.