3 speed ?'s

because in 1st and 2nd gear the leverage is better for the engine, but the higher the gears the car is harder to accelerate and a weak pressure plate will definately show up then. I had the same problem with a cheap over the counter parts store press. plate and it slipped bad in 3rd and 4th, then I put slicks on it and it slipped in all gears! New p/plate and all was well.