apparently some later 6 gsr's came with the front torsen lsd from factory, when they ran out of normal open type diffs...
but from all the probs ive read on lancer register with these front diffs - mainly from 6.5 owners i would be happy if i didnt have one...
clunk/knocks from front transfer when turning right at slow speed (sometimes left), can indicate this problem. the bolts in the torsen hsg come loose and break. apparently rally teams would spot weld the heads of the bolts to stop the m8 bolts comming loose - only 4 of em there