It must have some form of 4wd? cant just rely on sodding traction control can it, smart ass
Its summit to do with the VCU, thats the problem i had on mine, still have a bit, and many people on here have pointed to the vcu, the problem with mine was the 2 back wheels were locked i rekkon and that why i was getting the juddering round tight corners.
Someone more useful and helpful will help you.