new 8.25 shudder in low speed turn

per post 18, there is currently no additive in there?Why?
Start by putting some in.
If the problem persists get just one rear wheel off the ground and perform a turning torque test. Attempt to turn the one wheel in a forward direction. If you can easily turn it, there is a problem.The cones will have to be lathe-cut and the spring pressure restored. I set mine up for street, on the workbench, with about 120ftlbs turning torque, with the proper oil-mix in the case. With the above test, you have to be a pretty powerful guy to rotate the tire.But too loose does not chatter.Too tight might.
If it is currently set too tight,more than say 140ftlbs turning torque it will want to spin the inside tire around nearly every corner. From the driver's seat, this can be interpreted as chatter.