Baldy you are correct for the the 36 Hydraulic brake backing plate. The early 36 1.5 ton trucks still had the 35 mechanial brakes. When the low cab came out in March of 36 they also went to Hydraulic brakes. A lube chart in the shop manual tells you what and where to lube each fitting. They used the zerk fitting both for chassis grease and for trans/differential lube 90-160W oil. The 36 rear end is a full floating design in which most everything is different than the semi-floating 35. The rear hub uses tapered roller bearing instead of ball bearings.
