Ax15 bellhouse knocking when cold? -
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Unread 07-22-2010, 07:55 PM   #1
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1999 TJ Wrangler 
Join Date: May 2008
Location: Norfolk - Old Dominion, Va
Posts: 2,743
Ax15 bellhouse knocking when cold?

Posted this in the drivetrain section too but no bites yet so...

Like the title says

I have a 1999 Tj with a 4.0/Ax15 with 160 K on it. There is a distinctive knock coming from the bell housing that is worse when its cold and goes away after several minutes of driving. It varies with engine speed and stays constant with rpm whether clutch is in or out, or trans is in or out of gear.

Note... this is definitely coming from the bell housing not the oil pan. It sounds like a rod bearing and I thought it was one. I was about to pull the pan off today when I listened to it again and determined it is definitely not from the engine.

After it is driven for a few minutes the knock goes away completely and it runs like a champ. Any suggestions as to what this might be? Thanks!
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ax15 , knocking , cold , bellhousing , help

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