I have grinded gears with my 990 while shifting on the go but if I slow down a tad or lower RPMs I get no grinding. The manual online and print version say you can shift on the go so I don't see any harm done when I do. Have any other 990 owners noticed this? /forums/images/graemlins/confused.gif Zuiko hopefully you will get yours soon. I too had to wait for miine to come from the factory. Well worth the wait!
Nick
990 4x4 turf, 272 RFM, 430 loader, 25A flail