PAUL A. - If your refilling one of your 149's then YES, 3-1/2 quarts should be correct, but the fill level should be the 1/2" NPT pipe plug on the cover on the rear face of the transmission, the one that takes a 3/8" square socket extension to remove/install. I wasn't aware of any other plugs on the rearend casting except maybe on an Original where there was one if I remember correctly left over from the Cub FARMALL design.
Not sure what to say about the oil running out of your new rear axle seals. Did you install them with the flat surface facing OUT so the lip faces in? I normally wipe a thin film of gasket sealer around grease & oil seals, Permatex Form-a-Gasket or something, not normally RTV.
While 30W engine oil is O-K, most people use IH Hy-Tran hydralic/transmission oil in their Hydro's.
Not sure what to say about the oil running out of your new rear axle seals. Did you install them with the flat surface facing OUT so the lip faces in? I normally wipe a thin film of gasket sealer around grease & oil seals, Permatex Form-a-Gasket or something, not normally RTV.
While 30W engine oil is O-K, most people use IH Hy-Tran hydralic/transmission oil in their Hydro's.