I finally got my 70 GT on the road. There is a noise coming from the rear of the car as I ride down the road. I do not hear the noise in first or second gear, if it is there, it is very faint. The noise gets much clearer in third gear and more so in forth gear. However, it is not coming from the transmission, it is coming from the rear area. It is very noisy when accelerating and decelerating, but faint or not there at all when coasting or just between accelerating and decelerating. I am thinking it is either a pinion bearing or gear noise. I had a pinion bearing go out in an old Pontiac years ago, but it made noise at all speeds and all conditions. I have checked the oil level in the rear and it is ok, but I have not tried draining it and refilling it with new oil. Any insight would be greatly apprciated. I have a 71 GT parts car and may just swap the rear out, but I would like to nail this down before I do that.