On the way to my cottage this weekend my 1999 Contour SVT developed a grind. All of the other gears work fine, but when I go to shift into 3rd I always get a grind preventing me from shifting into that gear. I can only shift into 3rd gear when the revolutions are perfectly matched and by moving slowly, so I've stopped using it in the meanwhile. Is my transmission gone? Is it the synchros? or something else? How much is this going to cost me, and what parts do I need?