Looking at buying a 2005 Cummins 5.9 with a 6 speed manual. I started it up drove it forwards and backwards, took it out of gear and let it idle and there was a knocking sound, i pushed the clutch in and the sound went away, let out the clutch it came back. They said they are gonna look into it... just curious if anyone knew what this could be?? Just so i can make sure they get it fixed properly.

Thanks

 

i guess they took it to a dodge dealer and they told them it is the spacer and release bearing rattling together and that this is a common noise. Anyone know information about this?

 

More likely either the throw out bearing is shot or it has a dual mass flywheel and the springs are shot.

Which transmission does it have? G56 or NV5600?

On the G56, reverse is left and down.

On the NV5600, reverse is right and up.

The G56 has the POS dual mass flywheel.

 

i am going to look at it tommorow mornign again, i will look to see what tranny it is. Thanks

 

I think the NV's were know to have a little gear lash noise when sitting with it in neutral and the clutch engaged. It may very well be normal.

 

ya it has the NV tranny in it, so maybe its normal then not sure... its still under warranty so if i do buy it then ill take it to a different dealer and get it checked out for sure.

 

just to give you a general consensus, i agree that it sounds like the throwout bearing, as long as the knocking sound you're talking about sounds kind of like a rattle. try this...go up a hill in 2nd gear or so, then let the RPMs bottom out without stalling, then hammer down. if you hear the rattle in that scenario its definitely throwout bearing.