Sometimes when driving the 1993 FZJ80 if we are on a rough road or go over rail road tracks there is this god awfull noise coming from the front end that sounds like rubber rubbing rubber. I cant find any marks on the tires that would show they are rubbing somewhere and I dont see anything that is around the driveshafts that could be causing it. When it happens the noise lasts 10-15 seconds and then everything goes back to normal. The truck just turned 116500 miles last week and as of this time I dont think the Birfields have ever been repacked. I am collecting the parts to repack and replace the wheel bearing but was not planning on diving into the project until it warms up round here(March?). Anyone ever have anything like this happen before? Words of wisdom from the crowd? Thx--Steve