Nothing like that so far. Don't know much about the Torsen diff, but in the old days what you describe would sound like common low speed behavior for a Posi-Trac unit. At parking lot speeds they would become 'jerky' during tight turns, while the clutch packs in the diff slipped and then re-engaged. There was a special kind of lube required to smooth the action of those clutch packs. Again, I don't know much about the Torsen units. Sorry I can't be more helpful.