Put Toyota orange RTV on the splines and inside the companion flange prior to sticking it back into the seal. Prevents seeping around the staked nut. Of course, oil the seal slightly first. BTW, I have usually lightly rehoned (at ~45* to the direction of rotation) the companion flange sealing surface with emory cloth when replacing the seal too.

-Bill
'87 4Runner w/ '96 5VZ-FE, 'Red Chili II'
'97 Taco XtraCab 3RZ-FE, 'BlackBean'
TLCA # 13257, Rising Sun 4x4 Club Land Use Coordinator
"He who stops being better stops being good." -Oliver Cromwell