[deeesstoronto]

A CV boot keeps dirt from getting into the CV joint and keeps grease from flying out. Dirt that gets in causes increased wear.

Unless the boot is majorly damaged, very limited dirt gets in, most of the grease stays in, and lifetime of the joint isn't severely impacted.

[talldatethrow]

The point is, yes his grease flew out. And dirt got in. But his CV joints aren't being used, they are just free spinning around all day not moving any torque. So yes his torn cv boot didn't give him trouble in a Toyota 4x4. It wouldn't have given him trouble in a dodge 4x4 either..

[ethbr1]

At some point I was expecting clicking or grinding, but it just kept going.

How long do unsealed CV joints usually last?

(At the time, I didn't have access to a garage, so it was more than I wanted to repair at home)