Always good to have knowledgeable ppl like Dan and Roelof.
You may be scrubbing chassis, scrubbing front on brake and rear on acceleration. No? I would do either one of these:
Ask local experts or bring everything back to default set up. Default almost always works. Or upload your set up sheet here.
Think of solid axle in rear as diff with crazy high cst oil like 3 mil or over. If you already understand what different oils do in rear diff, you'd be able to imagine how solid rear axle will work.