ive had 2x Volvo 300 series with welders, and 3 other cars with them too, as well as driving god knows how many other peoples with them.

they fine, only ever notice them sub 5mph when turning tight corners, aside from that sort of speed a "proper" (ie not some shite standard viscous etc) diff feels the same.

id say your just a bit gay

DEFFO wouldnt say 340s/360s are any worse with them than any other cars either.