So I was driving today when out of the blue I start to hear a knocking. investigate a little further and it only occurs when I am in gear and at the top end of it. does it in all four gears. I have heard this sort of knocking before in a buddies ranger, but it was only in fourth gear and it was the entire way through. This knocking is only at the top end, so Im thinking, clutch? Maybe? I recently got an H41 and Atlas, so i will be extremely set off if it is either of those guys. Thanks for the help!