U-joint Noise

[91Coupe]

I have a whine in my rear that appears to be coming from the rear u-joint. It is only heard from 5-30mph. My aluminum driveshaft is only 4 months old. Has anyone else experienced u-joint whine/noice? Thanks in advance.

 

[Graham052]

I would think a U-joint would make a clunking noise, not a whine

 

[stangman]

the whine would be from the gear (sometimes stock ones will whine too), the u joint makes a clunk, or a pop. when i had 4.10's installed on my old car the u joint decided to go out at nearly the same time & freaked me out cause i thought it was the gear, but on further inspection it was the u joint