2.5 manual petrol estate GTX
My son Jonny had this car for the last five months, in which he has covered 6000 miles. He returned it yesterday, told me going perfectly apart from message about high dipped beam.
He did not mention the howling noise from the rear of the car, varying with road speed, and not varying with turning left and right - weaving along the road, test for worn wheel bearing. Noise is a whine, not a rumble. I have checked diff oil level, it's OK. Previous owner, ajsphead forum member, has changed the diff before, had it done by Swiss Valley garage, I jhave the invoice. I went for a drive with the wife sitting in the back seat, she comfirmed noise was 'central' and did not vary with turning. It was a 'sweet' noise, could be air leaking in or out, she said.
I reckon it's worn diff, but would like to be sure before I change it. Are there any more tests I can perform?