coupling xc90 2,5t

Hello since november I have now and then the problem that the coupling slips through during the strong acceleration. (xc90 2.5 t 6-speed switch 60.000km) anyway I always had the impression that the coupling is very “partial” without exact pressure point. the coupling was actually only taken one time properly when I had 2.5 tons on the hook and had to drive backwards my court entrance. to such rides I usually take our jeep grand cherokee, but that was just under egs. after driving up (with grinding clutch) you smelled the clutch a little. however, I have never had such problems with other vehicles with the clutch if I had a heavy trailer on it. can you “replace” the clutch or did I offend it irreparably? is the clutch in xc90 generally very poorly designed? gruss daniel