It all has to do with cable tension and gear mesh. Those little servos don’t provide a lot of tension, and if the gears aren’t aligned just right when the gear change is made the one axle just has to turn a little more to turn the locking cogs to the right position for engagement. Nothing wrong with the system or how it’s working 😁

All I know is you don't shift it when it's in motion it makes a weird noise so I quit doing that I make sure it's fully stopped then switch mine was an engaging well when it was in motion and I noticed it because the truck would jerk I haven't had any problems so far maybe just make sure the truck is fully stopped before Switching it to lock

This is why I avoid crawlers with too many bells and whistles.

Had this issue with mine, definitely check the servo for the locking differential. I actually had canyon hobbies rebuild it for free. The new metal gears inside the servo solved the issue permanently. In all honesty it is wise to check cable tension, and inside the diff Incase something has worked its way into the ring and pinion gears not allowing the full lock.

I had had this issue and screwing the cable more fixed it.

You want your front locker to lock first. Here is the reason, when climbing up you can lock the front and leave the rear open. This will keep the truck from rising the front tire in a torque twist and help keep all 4 on the ground. Madmatt showed this concept on a rear 4x4 here on youtube. As for what's wrong with your rig I'm searching for the answer on my ultimate hauler. The rear axle won't engage the locker.

Mines on a Trx6 I cleaned everything out new grease was aplied and still doing it thinking the cable cuz if I give the cable a pill it locks it but also same as yours I was thinking about adding a shim on one side to help the locker not scoot back Lmk if u figure it out

Yes, I'm experiencing it. I was hoping your vid was a fix for me. 🤣

The cover must be closed to operate the diff lock it’s just pulling the top out instead of locking( correction works better with closed

Don't switch it while driving! Always stop, lock it and you can go

Trying to figger a way for the wheel off the ground stops spinning with the wheel on the ground keeps spinning on hsp rc

Dude I judged figured it out check the cable that goes to the servo and screw it in more I screwed mine in and it was able to pull it better and further

I just permanently locked mine and removed the servo

Your servo might be weak