Originally posted by InitialD
When it pulls to the left, I guess the front diff is not set correctly. My guess it's slipping. If it was pulling to the right, then the rear diff is slipping.
Now THAT is interesting. How did you deduce that? Its a handy tip if its true though so its good to know for sure.
It's not the collar that is giving you the problem. It's the setting inside the diff that is making the diff slip and hence the diff is acting like a oneway when you brake.
Yup, makes sense.