i know that when giving it gas you can not, and wouldnt want to, ull it out of gear. but if you let off on the gas u can pull it outa gear w/o pushing in the clutch. The RPM at which it poped out is I BELIEVE the RPM you can shift into 4th w/o using the clutch. Ive done this all the way up to fifth. Start out using the clutch but from 1-2 2-3 3-4 4-5 it is possible not to use the clutch. It slides right in. I DONT RECOGMEND IT cuz you will here grinding but i knew i was getn a new clutch so i didnt care. BTW what is the grinding, the clutch plate right.......not the gears?