I would start buy replacing that control unit. call that nearest Volvo dealer ask them if they would Mail you the part if you give them the credit card number. Its not to hard to remove that control panel. A good parts counter guy at Volvo would tell you if thats a common problem. I can post the dir...

First How many miles are on it?
They are a pretty good car as long as the maintenance has been kept up
If it has under 100k I would just look to see that all services have been done on time. This is not the XC model so the all wheel drive functions are not a problem. 105k timing belt change.

Could be wheels need to be balanced or CV Axle going bad. I would get the front end off the ground check for play in side to side in your tie rods also. Worse case take it to a tire /front end aliegnment shop place tell them what your experiencing ask them what they would charge to take a look at it...

Can you discribe this Judder a little better. Does it shake or what. I have this same vehicle.

Ditto.
I had the same results...

Don't understand your question Are you a mechanic or dealer? I just say this If you sell it with a blown engine what ever that would cost to have installed plus the cost of a engine needs to be deducted from your asking price. I don't know what you situation is as far as if it financed or not but if...

They are still the safest car on the road if your in a accident. The engines are outstanding. Try gabbing a hold of the very top of the door at the rear edge an see if you can pry it open and then try that on a Ford. I still think there a great car. I don't think the sweeds let Ford influince them m...

I use to cruise the strip in my old mans studebaker pickup truck.....
Didn't get many chicks but had allot of laughs.

Does it use GM fluid then and is there a internal filter?

Who Makes the Transmission in the 2001 S80 2.9?