1G Driveshaft vibration

[greddy_1700]

Hey guys,

my 94 TSI AWD winter car has this terrible vibration that is seemingly coming from the transmission. It sounds like a heatshield rattle above 4k rpm, but with the car in neutral up on a hoist, you can feel the driveshaft vibrate like crazy. A mechanic told me that the center diff was gone and that I need a whole new transmission. Does that seem possible, or should I be looking at something else.

Thanks,

Garret.

 

[jesse_fc3]

Could be carrier bearings that would be my first guess if the center diff is gone u would be 2wd and could probly spin the tires like crazy if u tried.

 

[greddy_1700]

I know the carrier bearings are shot, but the car vibrates in neutral when it is not moving. It basically feels like and sounds like a heat shield is loose.

 

[jesse_fc3]

Well u know the bearings are bad so thats what it is. your bearings probly ground down so much that there is a space between the bearings and the shaft and the noise is coming from normal engine vibrations rattling the drive shaft against the bearing.

 

[97gst_spyder]

Your trans could be loose also. I had the rear 12mm bolt strip out and not know until other bolts started to get loose.