I recently purchased two Moog Problem Solver ball joints from Rock Auto. One of them was nice and stiff with the boot firmly in place and pre lubed. The other ball joint moved loosely with a separated boot which looked like it should be installed by the user. It also was not pre lubed. Otherwise they appear to be form, fit, and function parts.
Curious about the differences I went to the local auto parts to inspect their Moog Problem Solver ball joints in stock. The two I inspected are like the “nice and stiff” ball joint with the boot firmly installed.
I don’t have a ton of experience with differences that may normally occur when ordering parts.
My initial thought is that someone may have ordered a Problem Series ball joint from Rock Auto, as well as an R-Series joint (Moog’s less expensive China made variety) and then returned the Problem Solver box with the R-Series ball joint back to Rock Auto to save a buck.
Does anyone have experience with part differences like this?