I drilled a hole in my gear case this spring when i had it apart as well. I put grease and 80-90 in mine. I cant believe IH didn't put a lube hole somewhere on the case. IH must have known what they were doing because mine is a #1 and it was never split until I split it this spring. Both the spirol pins in the drive sprocket sheared off.
I have been trying to find reasonably priced replacement tines and from pictures troy built horse tines look extremely similar to the IH tines. I haven't ordered any yet because I am trying to find some around here to measure. If I find some and they have a similar shape and the same hole spacing I will let you guys know.
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