Minnesota Master Builders

I will preface my review saying that I am an experienced mechanic - I worked on cars from childhood until I joined the military and then some more after I separated (and a lot during service). I brought a GM 4L60E unit to them which had a burnt out 3-4 clutch and probably some other damage.
They finished the transmission same day (this was 2020 in the spring) and the staff returned the unit with the pan sealed, a new torque converter, heavy duty clutches and a new hardened gear-set installed. The transmission went back in pretty quickly and functioned as expected.
After a couple weeks of caution and monitoring, I began to drive it harder. All summer 2020 (admittedly I didn't put more than 1000 miles on it) I drove it daily. It was parked in a driveway for the winter - in the elements.
This spring 2021, I started driving it again and immediately got to shifting gears in anger. I have been enjoying it since then and I am confident that I can proceed to add power to the engine and continue to treat the transmission like a chump.
The price of service and value for what you spend is outstanding. With that said, they do not work on cars. You cannot expect them to diagnose, repair or otherwise service your car - that is not what they claim to do. Take your car to a general shop and pay the hourly rate for that kind of thing. I also have a high degree of mechanical sympathy and aptitude - I knew exactly:
1. What I wanted
2. How to logistically get it done
3. What weak points I wanted to address and why
Thanks again for the great work. I would 100% come back but probably not with my 4l60E, the way it is holding up.

They do good work and fast service!

Was in St Paul for a car event from Kansas City when I had a problem with my 4L60E in my competition car- they answered the phone, met me at their shop, and let me change the parts in front of their shop. Saved the day! Great folks.