There is a shop on the north west corner of plano parkway and greenville, in Plano that I have talked with about my Saginaw and now with my Saginaw/Muncie OD. If I needed my transmission worked on, I would go with him.
I do not have any other experience with him but he was knowledgeable, gave good advise, and helped me with searching the Dallas area for old obsolete parts.
I talked to Eagle Transmission and did not trust them.