7700 transmission mainshaft

Hoping for some information from all the knowing ones that gather here. I'm working on a 7700 Ford with dual power. It needs the input shaft
for the transmission (the output from the dual power) D2NN7017A and the transmission mainshaft E2NN7C094AA. The transmission mainshaft is a
challenge to find. Dealer says not available. Looking for a good used one or NOS if we can find one. There is a used one on Ebay but the
internal spline does not look any better than what we have now. Does anyone know of a salvage yard that might be a good place to check?
Do we have other options. Welding them together? Google gives me a couple places to try to call on Monday. Thanks in advance for your
thoughts and advice.
 
Thank you for the information. My search did not show anything from A&I, but I see they do list the mainshaft. It has a different prefix but the rest of the numbert is the same. The description says it fits. I'll be checking that out on Monday. Thank you again.
 
Oh, we had to do that some years ago when it was dad's tractor. Was tough back then, our tractor guy got the wrong part, the one for a non-dual power tractor.

Then, I believe, didn't they change them out and made a different spline pattern because these wore out pretty easy? But that means you have to change more parts, more $$$$.

I suppose a lot of used ones are well worn by this point.

And then, youhave to figure out if it's the new or old pattern, on a with or without dual power machine when looking for used....

Paul
 
That the problem I am having. The part that A&I has available has a 30 tooth gear and I need a 29 tooth. The used ones I'm finding have excellent gears but the internal splines are shot. Is it possible to change to the shaft with the 30 tooth gear and change the mating gear on the countershaft to make this tractor move again?
 

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