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Rattle on acceleration

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Old Sep 20, 2017 | 06:02 PM
  #1  
Cobra Highboy's Avatar
Cobra Highboy
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Rattle on acceleration

So i have an 06 4x4 psd. When i accelerate it rattles and sounds like it's coming from the trans bell housing. I thought it was a cracked flexplate. I pulled the trans and the flexplate out. Flexplate is still in perfect condition. What else could cause this rattle sound. It only does it on acceleration and is louder if i have a trailer on. Thanks in advance for the help.
 
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Old Sep 20, 2017 | 06:48 PM
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FiznUKa
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Check your down pipe between the firewall and engine-transmission and the crossmember.
 
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Old Sep 20, 2017 | 06:53 PM
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Originally Posted by FiznUKa
Check your down pipe between the firewall and engine-transmission and the crossmember.
This makes sense with the scenario because with the trailer in tow it will torque up the engine mounts changing the pitch of the rattle.
 
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Old Sep 20, 2017 | 07:35 PM
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I checked around the down pipe and i have good clearance on it. I've been reading other forums and some are saying the torque converter could be going bad. Anyone had an issue with the torque converter?
 
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Old Sep 21, 2017 | 01:42 AM
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any soot marks on the firewall near the bellows or connections?

Richard
 
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Old Sep 21, 2017 | 08:04 AM
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I have read that when a TC goes out it sounds like a can of marbles but have no experience with it.
 
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