MB stopped selling o-rings over 2 years ago.

They issued service campaign that requires replacement of the plastic connector (modified) with o-rings. MB part 203-540-02-53, about $8

Re-read Steve Bro. post about the replacement trans valve body NOT being Matched to the trans computer. MOST likely you NEED a newer version computer.

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The new trans computer sounds expensive....how much is it?

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