Fixed! Turned out to be an incredible easy fix. One of the first parts I checked when diagnosing my problem was the roll pin on the rockshaft stop, I took a look and confirmed the pin had not fallen out because I read that happened to others with my same problem. Like I said in my original post...
I have read through a lot of old postings about this issue but I can't find an answer for my situation.
My 3320 (1650hrs) has a noticeable extra load on the motor when the 3-point arms reach the full up position, I can move the lever down slightly and the excessive load goes away. I have...