Since you havae got the pin disconnected and the drive shaft is loose in the coupler, go ahead and split the tractor. It is easy from this point on. Just remove the 3 bolts on each side that holds the tranny to the frame, jack up the frame in front of the tranny and roll the axle out. Then you can remove the top cover and see what is loose in the tranny. Don't worry about which tires spin when yet. Just look inside the tranny and see if the shifter forks are working.
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John
Proud Owner of a Model 100 and a Model 124.
A homemade cart, 2 x 42" mower decks, a 38" deck,
a 42" front NF blade, and a lawn sweeper!
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