or, if it is a clutch type, there is normally one thin one on each side, you can replace one of them with a thicker one and that will tighten it right up. Don't replace the thin one on both sides though, it will be like a spool, I did that and it was so tight, when I'd turn into a parking spot, it would coast about half way in and bind up and stop the car and it would start to roll backwards unwinding the axle shafts!
If you do have the clutch type, and do not have any extras laying around, PM me and I will look, I may have a thick clutch I can send you (also the same clutch pack as the 30-spline Dana 44 powerlock if you konw anyone that is into 4 wheeling))