I don't know that one. The shop I use sends theirs out to, or exchanges them at, TBR in Atlanta. I have had two complete rebuilds over the years that came from there and I have been quite satisfied. (TBR stands for Transmissions by Ron)

I think TBR only performs the bench work. Meaning they won't Remove & Reinstall.

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02 S500
92 500SL
92 400E (Sold)
87 300E (Sold)
83 300D Turbo (Sold)
75 300D (Sold)
74 240D (Sold after 20 years)