Mini LST Metal Diff Leakage

[VintageMA]

Just got a MLST a week back and bought the viscous diffs with them and installed right away before even running the truck. Also has a spare mini-T ball diff and put that in the center. I filled the front and rear diffs with the 2K oil that comes with the kit.

Notice the wheel play getting very loose over the period of 3 - 4 runs and thought I might just need to put in heavier oil. Stripped down the truck and noticed that the oil had almost completely leaked out of seal on the metal gear side of both of the diffs. Has anyone else had this problem / know of a fix?

I cleaned them out, re-seated the o-ring, and fill them with 20K F / 40K R and well see what happens over the next week.

Called Losi and service said that they would expect minor wetness around o-rings after running and that they would need to be refilled every so often, but that the behavior I was experiencing was not to be expected.