This is the second Jaguar I've had where the rear end pinion bearing starts howling on the highway when you are coasting. Is it a common problem, my car is under an extended warranty, but need some proof that this is a known problem through Jaguar. Are there any service bulletins on this at all that someone could point me too. Need to try and get this covered under warranty as it is a pretty expensive fix. Thank you in advance for any help on this.

 

What year is your car and how many miles? I know they list servicing the gear oil rather early in the diff's life cycle. I've been questioning reasoning myself.

Regards,
Derek Fricke