On mine the cv shaft seals went, and the noise was the hubs kicking in and out. Mostly while on slippery ground though. And really loud thumping. But i could tell right away when it went from 2 to 4 wheel drive.


2001 Sportage, 4" RSG lift, Cragers W/31 10.5 Micky Claws, Warn Manual Hubs, 16 gallon Pro Street Fuel Cell, Custom Snorkel, K&N Filter.
1989 Dodge W250.