Sorry to add another noise question to this forum, but I've been searching for months for similar threads. I have a 2011 JK with 6spd and 80k miles. It does have the TOB noise in neutral. What I'm concerned about is that when I'm driving and the engine is under a load (uphill) the engine makes a noise that I can only describe as a mid to high pitch clank...clank....clank....noise. Not too loud, but definitely noticeable by me. I'm concerned it may be a crankshaft bearing noise.
It makes a similar noise at a faster rate if I take off slowly in first without giving it enough gas. It's like the noise the engine will make right before it dies. It will usually do this at about 2000 to 2500 rpm. The Jeep did have a cold air intake on it when I got it and when I took it off to clean it I found evidence of dirt in the intake and the return breather hose.
I'm concerned that I may need to do something to prevent ruining the engine.