Hey...you folks out there with an "early" Lehman belt drive kit do me a favor...if you get time. I have around 30K on my Ultra Lehman conversion and just happened to sit on my right fender the other day and heard a "clunk". As I would sit down and get up..it would "clunk". I traced the noise to the differential housing while I had the 105-pound wife jump up-n-down on the fender. I had recently had a wheel bearing failure and got all that fixed, but now fear I had the inner bearing get damaged when the outer ran loose for a while. But, nothing seems to be loose, the belt runs true and neither wheel appears to have any abnormal side-to-side slack. I think the noise is coming from "inside" the differential carrier and it may very well be that the grease has slung out, or I have been using the wrong grease. These older units call for a shot of grease at 1,000 mile-or-so intervals and I can't say I have been judicious about keeping to that schedule...but I do grease it now and then.
I think it's just a little slack in the rear end. If you would jack-up the right hand side (long side of the axle) and rotate (bump) the tire left and right...you can determine how much slack you have and what-if-any noise you hear. I would like to hear from somebody that could do this. A new differential has a price-tag of $2,585 to the dealer and some of you know what all is involved in changing that out.
I just need a "feel" for how much slack you have in your differential and would appreciate any help you could give me.
Mine pulls fine and nothing is loose....may just be normal slack and my use of improper grease?