[frdfver]

olddog,
Input, main shaft-output shaft terminology the same on all transmissions. The input shaft being the one at the front of the trans, which inputs the trans, the shorter of the two. The main-output shaft being the one with all the gears on it and out puts the power. Then the counter gear-shaft in the bottom of the trans turns all those gears into ratios. Hope this helps you solve this.

Paul...