question bout 8 3/4 oil seals

yeah...got to looking at it closer and flat side out is the proper way. New axles with bearings from dr. diff less than 500miles, but I'll check on o ring just in case before I slip them back in.

I've seen alot of guys say use paper to slip the splines past the seal...are they really that prone to tearing...never done this before so just curious to learn.

thx