Knocking from the rear

[russhixmo]

Just picked up an 84 325e with low miles and when it gets to about 3500 a strange knocking and vibration comes from the rear end, almost sounds like a drive shaft out of balance bu it only does it at higher rpm's. Any thoughts?

[jlevie]

My first thought would be a bad center support bearing or binding u-joints in the drive shaft.

[russhixmo]

A very Likely possibility I'll look into it

[kalib0y]

check them drive shaft guibo

[russhixmo]

I'm betting it's the center support bearing, I'd think a gweebo would make the noise all the time or at a certain speed verses a certain rpm

[russhixmo]

Ended up being a destroyed gweebo and a bad center support bearing, 45$ for of fix, not bad.