Whine or road noise

[Howard]

The last couple of weeks I have been using my Grenadier for a 140mile daily commute to site, mainly on the motorway and have noticed a loud whine from around 35 mph. I can't decide if its from the tires or transmission. You would not have a comfortable conversation with the whining.

The truck has only covered 4500 miles from when I purchased it new earlier this year.

The tires are standard fit 17" BF Goodrich which I have fitted to other vehicles and not noticed this level of noise. I have a set of the Bridgestones and rims which I will put on the truck over the weekend to see if the noise improves.

Question is has anybody else had a similar problem. Could it be a transmission issue at such low mileage?

No roofbars , no high wind , correct tyres pressure.

 

[Skydance]

Previously there has been reports with a metallic whine where the Bowden cable (transfer cable) come loose and touches the drive shaft. Mine did this and easily fixed using cable ties. There should not be no whine from KO2’s, the only noise is a quite humm from the transfer box and that’s it. Other noises which are normal is turbo whistling around 1800 rpm and steering pump whistle at 5 mph.

I would suggest having a look underneath towards the centre front above the prop shaft first.

Also some people reports small stones on the rear brake drum.

Some reported diffs. Check diff levels. Diff oil should of been changed on your first service.