1984 M1008. Have newly rebuilt transmission (TH400) and transfer case (NP200). When I coast down a hill in 4WD with hubs locked I get an intermittent rubbing/grinding noise. I do not get any noise when I unlock the hubs. I sucked some differential fluid out of the front differential and it is grey in color. Probably whatever I heard grinding is in there. I think if it was metal from the hub it would make its way throughout the differential, as I assume the axle is lubricated with the differential fluid. Is this so?
This all started when I had the rebuilt transfer case installed. Never happened before. The mechanic said the front right wheel had a little play in it and he tightened it a little. I'm getting a little too stiff to work on this stuff anymore lying on my back in the snow and ice. I want to be armed with what the problem could be before I bring it to a mechanic. I removed the hub cover and the grease I could see appears dry.
I do not get any noise under load (going under power or plowing), only when coasting in 4WD, (with the hubs locked in). When I unlock the hubs the noise stops, even with the Transfer case still in 4WD. My main question is: If the hub is being ground up, could that make its way to the differential? It seems unlikely that the differential would go bad just after installing a transfer case.
Thank you for any input.
This all started when I had the rebuilt transfer case installed. Never happened before. The mechanic said the front right wheel had a little play in it and he tightened it a little. I'm getting a little too stiff to work on this stuff anymore lying on my back in the snow and ice. I want to be armed with what the problem could be before I bring it to a mechanic. I removed the hub cover and the grease I could see appears dry.
I do not get any noise under load (going under power or plowing), only when coasting in 4WD, (with the hubs locked in). When I unlock the hubs the noise stops, even with the Transfer case still in 4WD. My main question is: If the hub is being ground up, could that make its way to the differential? It seems unlikely that the differential would go bad just after installing a transfer case.
Thank you for any input.