Had a new clutch slave cylinder installed in my AX15 and went ahead and replaced the clutch while they were at it. Now, it's got a very slight knock when I first fire it up and at low RPM it's got a intermittent knock coming from what sounds like could only be the transmission (behind and beneath cab, not from engine compartment). Drives great, just put 500 miles on a road trip, but sounds pretty rough.
Any ideas on what could be causing it?