When I purchased my van, I removed the rear wheel bearings and inspected. Replaced one of the bearing because it had some pitting. I repacked all bearings and re-installed. The last oil change I noticed the rear wheels had some wobble (play). I ended up tightening the bearings up without inspecting. Now on this oil change, I noticed the back wheels are loose again. WTF?

I will remove and inspect again. Is this normal on a van or what? I would like to switch to rear disc brakes anyway, so I'm guessing that will require new bearings with the different spindles correct?

Anybody got a rear brake set up for sale?