Shaky Wheel - Porsche 924S

The left rear wheel on my 924S (pretty much the same as a 944) seems to be loose and shaky. Not unbalanced wheel that vibrates when moving. I can physically move the wheel a couple degrees when it is off of the ground.

Trying to diagnose the most likely culprit. Here are a couple of my thoughts, and what I've done to diagnose them:

Wheel bearing: don't know. It's not making any noise, and it would have had to have given up pretty significantly pretty suddenly for that to be the culprit.

Hub/Axle bolt: Seems likely this could have slipped. But it kind of doesn't look that way. Plus, I can't break it free when hopping up and down on the end of a breaker bar. If it had slipped loose, seems like it would be ready to come loose even farther. To take this thing off, I think I'm going to need a pretty hefty impact wrench. Torque spec is ~320 ft*lbs.

Something else?: Maybe there's something deeper in the hub assembly that needs to get tightened up. Feeling around the back of the hub with my fingers, I didn't notice anything. Most likely if there is, I'll need to get behind the hub, and I'm back to needing a mondo impact wrench again.

The control arm is solid. Also, the brake caliper assembly does not move with the rotor and hub.

Any thoughts or suggestions? Should I just bite the bullet and take it to a reputable shop to get it repaired?

So you jack it up, and you can make the rear wheel wobble? If that is the case, the bearing the likely culprit despite the lack of noise. While jacked up and you are wobbling the wheel, look at the suspension to see if there is any unnatural movement, that would indicate a problem in the suspension and not the bearing.

Wobbly wheel, can be only a couple of things. Bearing(going bad or not tight), loose wheel lug nuts, or suspension connections breaking down.

It is not the suspension. The control arm and shock do not move. It's not the lug nuts; I've checked and double checked those.

So, likely culprit probably is the bearing. Is that something I should be up for tackling myself, or have a shop do? Maybe try to pull the assembly and then take it to a shop to get the bearing pressed in?

I don't like doing them, and usually think it's worth paying someone else to do it. That's just me though.

You may be able to rent an on-car bearing press from someone, it's essentially a large bolt, a cup and a bunch of heavy adapter washers. Look around for a diy article on your specific car to be sure there's nothing weird required.

If the bearing has been bad for a long time the hub may be damaged and must be replaced also.

Press tool

I've got the shop manual. I was skimming through it earlier today. I don't think there was anything weird for hub removal. I didn't look closely at bearing replacement though.