Lower Ball Joint Snap Ring

[kleine_zwiebeln]

2011 Silverado 1500 4x4, cast iron lower control arms. The old ball joint was some kind of non-OE with a grease fitting and a snap ring on the top. The new GM ball joints (19209396) did not come with snap rings. They also basically dropped in with a whack from a hammer, did not need to be pressed in. 

 

Do the OE lower ball joints use a snap ring, and do I need to replace the control arm if the new joint goes in so easily?

[kleine_zwiebeln]

So the OE ball joint is meant to be crimped down onto the control arm instead of using a snap ring. I'm just going to get a different set with snap rings, and if they are still loose then I will have to get a new control arm.