Not the amsoil, check the clutch fluid, (brake fluid) it should be clear. If it looks like Ice tea, it needs to be flushed. This will most likely repair the clutch shifting. I pumped the clutch when this occurred to me, It got me the last 100 miles home. Flush it --it should be fine. The fluid will absorb water and contaminants over time, this is all mine was.
Bill:080402gudl_prv: