Originally Posted by
DesertRat
The car is lose at high-speed turn-in, while accelerating out of the corner, and on changing directions despite the entire setup being geared for rear traction.
It easy to over do an adjustment and make the situation worse. For example, a soft rear suspension is suppose to help increase rear grip, but if you over do it, it can make the back end loose when changing directions. It can also cause the rear inside tires to lift slightly in mid corner because there is so much grip, and when this happens, the back end can snap loose.
Without knowing what your current setup is, or seeing the car in action, it's hard to know what you need.
Less front toe out, if you have toe out, would help decrease turn in.
Lighter rear diff oil can help with better grip out of corners, but will also give more turn in.
Loose changing directions usually means the rear is too soft.