11.5 AAM bearing locknut spanner wrench?

[GMC D-Max]

Just trying to accurately identify which tool fits the rear hub bearing locknuts on the 3500:

OTC tools shows a #1929 (2.625" OD) for axles up to 10k, and a #1930 (2.875" OD) for axles 11.5k to 13k. I think the axle in the 3500 is rated for 10.5k, so I figure I've got a 50-50 chance of picking the wrong one.

I won't resort to using a hammer and drift. That's hack!
If I knew what the dimensions of the locknut were, I'd just make the dang wrench!

[Kennedy]

In my experience they spin off easily with the tip of a screwdriver and nothing else. There is a single lock ring with a square key and a small spiral retaining ring. Nothing to jamb to secure.

[GMC D-Max]

Thanks, John!

How does the preload stay set on the bearings if there's no locknut, only the retaining ring? The key does it all? :confused:

[Kennedy]

The adjustment is pretty coarse with this design. I've always found that if I run then up snug it's a bit of a push to get to the next notch so right, wrong, or otherwise I back down to the first notch down and key it there like I would with most any other wheel bearing.

[GMC D-Max]

Got it. Thanks for your help! :)