High RPM Driveline rattle

[mdurbahn]

When driving my car aggressively I just started to get a bad noise at high rpms over about 3500. Sounds like a rattle coming frome transmission/engine area. It doesn't happen when I am in nuetral though so I have ruled out and engine problem. I think it maybe the clutch pilot bushing/tob. Sound like something anyone else experienced? Is it dangerous to drive it right now?

Thanks, matt

 

[dave6666]

Did you check your u-joints and motor/tranny mounts yet? From the discussions in this thread?

http://forums.viperclub.org/rt-10-gts-discussions/627320-2000-mile-drive-showed-some-problems.html

Because that would be the first thing I would check. You might add on to the list checking the rear hub torques too. Heck, spend a day on the thing and torque everything associated with the rear suspension and differential.

 

[mdurbahn]

Yea I have it up in the air now on jacks,my ujoints feel tight. Mounts look ok from what I can see, I am going to bring it in to a viper tech to put in 3.55's so when he takes the diff out I think we will see better if anything else is loose.

 

[ViperGeorge]

Are you sure its not pinging? Detonation can sound like a rattle. Usually happens under load. Very bad thing.

 

[dave6666]

Yea I have it up in the air now on jacks,my ujoints feel tight. Mounts look ok from what I can see, I am going to bring it in to a viper tech to put in 3.55's so when he takes the diff out I think we will see better if anything else is loose.

You have to put a jack under the engine/tranny to see the mount problems. Mine looked PERFECT when static. But when removed from the car...

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Look for separation like this:

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[dave6666]

Also... Might look for missing weights on driveshaft. Spot weld with nothing there.

 

[mdurbahn]

Cool I will check those, do you mean like place a 2x4 across the oil pan and jack up to see if it moves?

 

[dave6666]

Cool I will check those, do you mean like place a 2x4 across the oil pan and jack up to see if it moves?

That would be the ticket. Don't be bashful either...