Terrova repair???

[Nater]

So after giving a positive recommendation of my terrova I got an issue

At the base of the drive housing a collar has slipped, or broke off, and is sliding down the shaft. This causes the shaft to rock in the drive housing, no good! I can push it back in, but it quickly slips back out. Is this something common? Can I lightly tap it back in to better secured? Got a call into a shop, but I won’t hear back until after the holiday weekend.

Any ideas? Was planning to fish all weekend.