radiator fan rubs somtimes on my 2000 jeep(174000), when i put it in nutral, it stops
Chances are your fan is hitting rubber that is coming out of the harmonic balancer.This is a normal sign that its worn out and time to replace it asap.
Also could have a broken motor mount that allows the engine to move and fan rubs against the radiator shroud when put into gear. You may notice it more on hard acceleration.
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