Quote:
Originally Posted by mcox42
John,
Had, what sounds like, a very similar experience last year. Sounded like rear wheel bearing but couldn't distinguish which side. Booked it into Volvo for Wheel Bearings got call from the dealer to say it was the Haldex unit. £3500 for the Haldex and including some other bits and Labour £5k+.
They told me it was definitely the Haldex unit as their master technician (30 years experience) had been looking into it (t doing a lot of listening along the drivetrain).
To cut a very long and tedious story short...Diff bearings were at fault. Rear Diff sent to refurber and now quiet as a mouse. One very embarrassed master technician especially as they now had a £3.5k paperweight in their parts department. Significantly less beer tokens spent as well!
I've been told by a reputable expert that the AOC coupling (Haldex) doesn't have any bearings in it. The AOC module is electronic, so your grumbling will be coming from the rear diff.
Cheers
Martin
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I personally don't see how one could definitively isolate a bearing noise to the AOC or diff since they are essentially a single assembly. Also Volvo don't "open up" either, they will just replace with new. There is a bearing in the Haldex unit at the front to support the input shaft and flange.
hence an experienced specialist is the way to go...
__________________
2011 XC90 D5 Executive
2003 C70 T5 GT
2012 Ford Ranger XL SC
1977 Triumph Spitfire 1500
1976 Massey Ferguson 135
Last edited by Tannaton; Mar 28th, 2019 at 12:02.
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