Tru-Trac Differential

[JimNolan]

Guys, I've got a 3.50 Tru-Trac that I've had in my 57 for about 4 years now. It has the Moser 31 spline axles and housing. It has began making a lot of clunking going around a corner at slow speeds now. It always clunked once or twice but now it's getting alarming. I pumped up the tires to 45 lbs this spring where I'd always run them on 35 lbs, don't think that would be the cause but I just thought I'd say that. No leaks, never. Quite as can be when driving. It doesn't have clutch pads so that can't be it.
Do these get this way when they get older or is this an indication something is going wrong. I run regular 225 X 15" tires so there's not a lot of tread on the ground. Help

[Drew Pojedinec]

I think I'd jack up the rear end and make sure everything in the back is tight before condemning the tru trac.

[JimNolan]

Raised it up today and checked wheels, bearings etc. Drained Differential grease and checked for metal ( have drain in bottom of housing). Everything looked good, filled it back up with 90 wt. Runs good, no noise, just every now and then you feel it let loose. It used to be maybe one slip, but sometimes like yesterday there were about 5 times it slipped in one turn. When it was new it would squeal the tire before slipping. It didn't slip at all in the same turn today.