front axle howels in 4wd

[winkfab]

When i put it in 4wd it howels when i give it gas or let off the gas. It only does it when the hubs are locked in and its in 4wd. I put in a new drive shaft and still howels

[jesilvas]

Fluid in the diff? Not being smart, just asking.

[winkfab]

Yep, synthetic

[jesilvas]

Just checking. Ya never know with some ppl
Not saying you, just people.