Gearstar American Peformance Transmssions INC.

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I have used Gearstar Transmissions in all my vehicles since '03' and would not use any other one for high performance or heavy duty applications period!
I had them upgrade my 4R70W in my 04 Mercury Maurader after I super charged it and did a bunch of custom modifications and it is still going strong with no problems whatsoever.

They also did the transmissions in my 05 excursion diesel, and 2 F-350 Superduty Work trucks with one still owned and well over 150k miles on it to date!

Mark, & Larry are very good to deal with and are very knowledgeable and helped with any questions along the way, I will say thier prices were higher than other shops but when i looked at the quality and knowing that i will only have to install it once..... it was well worth it in the long run I'm sure.

I would highly recommend them to anyone looking to do the job correctly the first time without hesitation!