1998 5.9 Limited, with the Trac-Loc D44a rear end. I've been slowly working my way through the issues with this recent purchase, and now it looks like my rear axle wants to be the next thing to suck money out of my wallet.
Since I bought the JGC a few weeks a there has been a whining sound coming from the rear axle, so I figured bearings or something, but now I'm wondering it it's more. I pulled the rear cover a few days ago, and changed fluid, but no change in the sounds. Yes I'm sure I used the right lube with the friction modifier. The old lube didn't seem to have a lot of metal in it. I mean, there was a little metal-flake in the old lube, but not much.
So tonight as I'm pulling into my driveway, as I take the slow right angle turn, it seems
like I'm getting a binding sensation or feel from the rear. Almost like scrubbing the tires but not quite.
Oh, the viscous coupling was replaced a few weeks ago, this really seems like a rear axle thing.
Ideas? I know diddly squat about rear diffs.