I upgraded my clutch to a SMF SBC stage 2 endurance about 5k miles ago after the stock DMF clutch failed. A few weeks ago I killed the 4th gear synchro. It will go in if you double clutch but grinds any other time. The other synchros like to take their good ole time too it seems with this install. car has dpf delete and stage 2 tune. Ive heard these clutches are hard on synchros after doing reading and i was shifting very quickly when the failure occured. Im currently running 85 140 oil since the synchro failure and it seems to help once the tranny has warmed up. I would like to upgrade the synchro if its possible but i dont know that many or any aftermarket tranny parts are available for this car. Id have to research what tranny codes the later year passats are running to see if theres a better compatible synchro available. Anyone know if the jetta or golf trannys will work on the ckra? Ive talked to a few guys that said the passat got a heavier duty tranny for the weight but im thinking jetta or golf trannys are more available and theres probably more aftermarket upgrade parts available for them. Anyone with any knowledge or info on this would be appreciated!