2012 Toyota RAV4 - Trans help

I have 112000 mile on vehicle. The transmission reverse gear is failing when backing up incline or hill. I need a second opinion for cost on replacement rebuilt transmission. Who is the best transmission repair shop in Minneapolis, MN area?

Click on mechanics files at the top of the cartalk website.
Go to local yelp reviews.
Do NOT start with AAMCO.
It needs to be properly diagnosed, could even be a computer problem.

… or Lee Myles, or Cottman, or Mr. Transmission.
Seek an independent trans shop that has been in business for at least 3 years.