When your turning Left and the wieght is transferring to the front, the Rear is lifting. The wieght is also being transfrred to the Right as you said your turning Left, so...
When the Left Suspension arm is at Full Droop, i would take a good stab that the Drive Cup is getting caught on the brace on the suspension arm. This would cause the Left Wheel to go tight as you put it....
Or i could be talking Boll**
