Hi all, I have a 2010 Barbarian auto and its started to make a loud buzzing / whirring noise when starting from cold. It happens almost instantly after starting then goes away after about 10 seconds. It sounds like its coming from the rear near the spare tyre. Anyone any ideas what I should check before taking to the garage?

Thanks in advance.

Hi. no been on here for quite a bit. Not sure about it on a 2010 model, but if it was on my K74 I'd be thinking about the rear diff lock vacuum pump, it's about the only thing thereabouts.
Davie.

I'd reckon on the rear diff lock. Nic