"One of the problems we encountered was filling up our catch can on the rear end .... and we found out that the
oil was going out the breather or vent hose into the catch can .... and then would not return to the diff.... then we would damage the differential..... "
I personally had never experienced this problem using the 4HU salisbury type , so when the new diffs being used did, I was unsure why. Even the one I got from Mike Mcluskey and assembled by Gear Pro (Alan Will) has never even dribbled after an outing on the track.
Thanks Morris for those great pics...