I have recently had problems with 4th gear. it grinds when going in gears and will come out of gear on it own while in cruzin in 4th. all other gears are fine. i think it the synchro and other friends have said the same. I have looked and looked on the net for a synchro but can not find any. Any idea where i can get on? i need one ASAP. Thanks for help!