Passenger differential bushing housing separated

I put on my 275/80R/18 tires today....and while removing the skid plate to trim or bend so the tires don’t rub....I noticed the passenger side differential bushing housing was separated at the top....I compared it to the drivers side and noticed a white plastic washer on the drivers side differential bushing housing but not the passenger side....here’s a few iPhone pictures.....looking for advice....drop spacers were installed 14 to 20 days ago....what do I need to do...to correct this....order parts I guess but how critical is this....is it safe or should I immediately stop driving the tundra until replaced...thank you...

 

Doesn’t look critical to me. Did you try to tighten the bolt? Maybe it backed out with road vibration.

 

Yes

 

I don't think there's an issue. Have you tried pushing up on the diff arm to see if it's moving up & down.

 

Yes... it looks good....little to no movement...