Knock sound coming from driveshaft ? Need help ! video
 

I have a very annoying knock sound coming from the driveshaft I think.
Everytime I give gas, we can hear a metal knock sound...

What do you think is it ? Any help would be appreciate
The driveshaft doesn't seems to me loose ...


VIDeO ! : http://s460.photobucket.com/user/mat...4650e.mp4.html

Inspect u-joints carefully.

U-JOint seems all tight, maybe a very very very little play but not more...

Are you turning the shaft to feel for play? Try pushing across the U-joint. Turn and repeat both.

There's a iron weight on the back, mounted with a layer of rubber, it's supposed to help with vibrations. Ironically vibrations have been known to eventually knock them loose.

Check that piece out. It's on the front of the diff, right behind the flange, shaped like a clover leaf.

I checked it and I think it's loose, but would this do the metal knock sound I hear in my other video ??

video : 087B3AFA-FD47-45E3-B03C-05707D721585-4509-0000022E7DA167AB_zps8524e905.mp4 Video by matsim007 | Photobucket

Yes, there is a shaft play ... I don't know if it's that big .. Here is a video. You can Also hear a metal sound when I turn it .. Maybe the sound I heard was from there ... But what do I need to change ?

video : 35BF55B2-0A85-487D-93DC-59D5C49804C6-4509-0000022C5A75ED4A_zps5feef98a.mp4 Video by matsim007 | Photobucket