Hub or front end issue?

[tylervalo]

I broke my drive shaft last year and had to drive the truck home on the front wheels in 2 hi. About half way home it started acting like it was popping the TC out of gear.

Today I finally got to drive it again, I took it around the neighborhood in 4 Lo and it started popping again, occasionally acting like it was in neutral for a 1/2 a second. I pulled it in my hard and felt a small pop then nothing, I could see thought he floor the front driveshaft was still spinning but not moving the truck in 4hi or 4lo. I unlocked the hubs, locked the hubs back and hopped back in the truck and it started moving again.

Anyone have a wild guess where my issue might be? I'm thinking something with the hubs.