I FAR prefer the felpro fiber? gasket myself. I spray it with oil so it will not stick so if I have to change a pig it'll come right off. The mating surfaces are wide & I've had good luck with them sealing with this if the surfaces are squeaky clean. RTV/TRS will definitely seal but getting it off in/around the studs to R&R a pig is something I do not want to do. As said you grease the bearings with quality grease (I prefer Kendall "blue" or MP "green" but there's many good types out there and the gear lube is for the ring and pinion in the center & some sloshes into the tubes but the seals keep it from reaching the bearings/or further out which you dont want (it's not a good lube for bearings/& it will contaminate brake linings).