I only ever installed a lock rite in a 1979 Bronco with a 9" rear. I followed the instructions and it went well. I installed it pre-internet era, LOL. I recall using a dial indicator and maybe dial calipers.
Pops and clanks are common.
I've had a few others that were installed prior to my purchase.
If unsure, I'd re-check te install. Be thankful, there is nothing in your axles that's as heavy as a 9" 3rd member.