hi, im new , bought a 97 gtp yesterday ,knowing there was a problem, tranny whines and slips, and then the next thing you know it works perfectly, is there a sensor or a simple fix to problem before spending on new tranny, previous owner said it just started, but yea i can shut car down and restart it and tranny performs great with no whinning, then it will just go south on me ??? help ! also need to know what tranny i have , is it the 4t65e, this car is turbo charged., or would it have the 4t65e-hd???