Front diff troubleshooting?
When I put my truck in 4x4 mode, I hear some horrible grinding noises.The 4x4 still works, but the noise has me worried. So, I disconnected my front driveshaft and checks the u-joints. The drivers side u-joint on the axle is siezed which could have caused all my problems. When I rotate the front diff by hand I can hear a grinding noise inside of the cover. I know it is not the hubs because it makes the noise when I hold each axle still. Shouldnt my front differential be completely silent? When I rotate my transfercase, it is smooth with no noise at all.
I have manual hubs. The noise started when the hubs were unlocked, and the truck was in 4x4 mode. So that seized axle was still in motion. I was also on the highway at the time the noise started. I checked the diff fluid and it was very low. I filled it up and the noise persisted. 4x4 still works, but the noise is scary.
Last edited by eblank8; 03-24-2008 at 10:36 AM.