Truck has an 01 nv4500 in it that makes a loud clunking in neutral and all gears but when the clutch is pushed in it doesn't make the noise
From what I've heard it has a valair dd clutch and they put the stock needle bearing type back in on the input? Does it need an upgraded intake or could it have blown that bearing out?

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Sounds like a bearing or two. You need to pull it apart to be sure.

 

2nd gear was all chewed up already pulled her apart zzzz

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