Tritech three piece rear main seal instal?
FINALLY! Talked to the engineer that designs these seals for Nascar and prostock.
The lip faces the transmission so vacuum pulls it tighter. Install dry and dry crank surface. Self lubing. except for light lube on the outer O ring for ease of install. Splits at 10 and 2 oclock. PTFE Can withstand very high rpm and much wider temp range than other seals.