As long as you have the radiator out remove the support that the radiator sits on. Just 4 bolts, gently tap it loose. Don"t worry about the gasket, you can make a new one from paper gasket material. By removing the radiator support this will let you look into the pedestal to see if you have any 140w gear lube in the housing. If not, you could use all purpose chassis grease to fill up the cavity around the bevel pinion and segment gear. I replaced the bearings, upper and lower seals on my CA NF this past winter. Can be done but a real pain. George R.