Thanks guys, but yes, I replaced the seat and socket- which is why I was concerned that after doing so I could still shift it into the 1st and 2nd positions but still not have those gears. I was still in third gear. I'm wondering if it is possible that I did not put the shifter back in the right position, or if that because the sleave/collar may have been jammed by that broken synchonizer tooth, if the shifter lever, being spring loaded, would just go around the 1st and second shift rod and allow my shifter to go into position without actually being in gear?