Over the last few weeks I've been wondering if our Carlsson was in trouble. Now I think it is. It's not doing slow speeds well.
For a while I've noticed a bit of what I can only describe as "axle tramp" when going forwards on full lock. But I put it down to the system trying to sort out grip in extremis as it otherwise drove well.
But today we got caught for a short while in very slow traffic on the M25 and another symptom occurred. Driving along at around 5 mph on a level, straight bit of road, there was double clunk, exactly like driving over a joint in a concrete road. But there were no joints. My wife said it has been like that for a week or two.
There was no sideways twitch, just the sensation of a clunk, fairly frequent and irregular. As soon as you got to normal speed, everything is smooth.
So, is it a problem? if so, which of the three items is it? Transfer box, rear diff or rear LSD?
No warning lights or messages yet. But I'll check for pending codes tomorrow.