Originally Posted by
S.Stew
Both the kit and Kyosho P5 O-rings should fit well into the case (no free play, but not super tight). I had the diff built with the Kit rings and it leaked slightly from the outdrives. I built it up this past weekend with the P5 rings and green slime and it hasn't shown any signs of leaking from the outdrives.
I've done nothing else with the diff (no sanding, no special shimming, etc.) and its super smooth and now leak free.
The orings don't fit well on mine, there is a lot of free play.
It appears to be a common problem with remedies such as green slime, diff grease or using CA to glue/seal the outer edge of the orings to the case.