A tip for you all;
I use , to keep the water out of my GPA bearings & diferential,
special double lip oil seals from "EBELE".
Type; NE 8378. size; 53.98 x 73.04 x9.52 RP.

As extra seal I use V-rings.
S.K.F. ; V-55 A.

Succes! (At my GPA hardly a drop comes in)
Greetings;Bob Asselbergs