"lower wheel carrier bushing". The joint between the lower control arm and the wheel carrier casting. The part is cheap, replacing it can be a PITA, ... if the boots are torn it's on its way out.

Does the fluid pump back to the SLS tank when there's a load in the rear? If so, it is either a bad or misadjusted SLS valve. If not, weak pump.

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Gone to the dark side

- Jeff