Hy Dave Parque, welcome, I'm fairly sure that once you remove the "U" joint flange you can pry the old seal out and replace it.
The o.e.m. p/n for the seal is 3651493 that translates to Napa p/n NOS22619 $22.49, I believe Napa p/ns for seals are the same as C/R, just remove the alpha part. Is your rear axle a Timken double reduction two speed? Hope that helps.
