This may have been discussed before, but I can't seem to find an answer. My NSG370 has a hard time shifting into first gear when taking off from a complete stop. The weird thing is that it shifts smoothly when cold, but after about 30 mins I have to hold the clutch in for about five seconds in order to get it in gear. Any ideas? I figure the synchros are good if it works when cold, and the clutch is fine since everything in the tranny slows down when the clutch pedal is held down. I changed the oil about two years ago with Pennzoil Synchromesh and the level is still good. It also seems to happen more in the winter time.