I bet your tires were bald too... or somewhere near that. Have you checked your sway bar links too? We ran as high as 39 front and 43 in rear and never experienced what you have...

Now as I was typing recalled once that our car never had the rear shocks changed and everytime my dad went around a good turn, his rear end always went out of control... Once we changed the rear shocks, no more problem. So I think this is why it happened on you.