Also the '36 has a fork stop to keep the truss rods from hitting the tank. I actually think this feature may have been introduced sometime in '35 though based on my observations.
The 34 models didn't have an alphabet prefix in the serial number, so they are easy to identify. The fork stop shows up on some 34 models.
The old school of thought, was that only the 36 models had the fork stop.
I'm of the thought that 36 was a run out year for the model, and that 35 was the actual last year of manufacture. I would love to see some production numbers for the various years, because I would be really surprised if Schwinn was cranking out Aerocycles in the same year that the Cyclock equipped Autocycle and Motorbike were issued.