Ok! Great news!
We went a talked to our local Kubota dealer, and they told us it was the plates in the back of the transmission. They said if it was scratched or bent that was the issue with it. I've got tons of pictures to share, and I can confirm all 3 plates were scratched and bent. One was bent very badly. Give me a few mins and I'll have the pictures posted for you guys! We plan on ordering new rings (plates, whatever they are called!) either tomorrow or Monday and plan to put them in Friday or Saturday (next weekend). Now the big question we have now is, are there more plates (or rings) up further in the transmission? Or are the 3 in the back all of them?