Testing an AWD system XC90
 

Without having some snow to test the AWD how can I do this, I'm looking at a second hand unit of 2003 with just over 100,000 miles, with geartronic.
Is there a simple way to check it out, if its up on a lift?
Are there any other items of real importance expense to look out for please?
Regards John

When I had problems with my AWD before I asked a local garage whether they would let me on a spare ramp. I offered to pay but they did it for free.

When I changed tyres last month I put the car on 4 axle stands.

Either way you will be able to see ALL 4 wheels turning. The front ones much quicker than the rear. And you can also check the Haldex if you need to.

Thanks Gazdoc
I'm new to this car, whats Haldex? Are there some other things I should be looking out for.
I'm buy not from a Volvo dealer.
Where can I get a PDF service manual for this car please?
John

Also called DEM - differential electronic modul - the brain of your AWD clutch.
Google for the car manuals. Not very good for repairs.
A better option is to download an older version of Volvo's VIDA. This is what the garages use.

To check if the front angle gear is ok the front wheels must turn when you manualy turn the propshaft under the car ..
To check AWD get all 4 wheels on wet grass or sand or loose stones and get someone to watch as you pull away with full power , all 4 wheels should spin for a moment before the car sorts itself out . If just the front wheels spin , possibly a problem with the haldex clutch unit but unlikely ..

Well I bought it, and all seems ok with the drive system as well, thats put me at ease with this now, as having read so much on here I was for sure expecting something to be wrong, as it wasnt from a Volvo dealer.
John