RDKJ:
To answer your first question. There is no maintenance required on the Mag SC itself.
Did Lingenfelter do the install?
You problem sound like one of programming, not transmission, although I have little info from your posts.
An upgraded transmission is nice BUT not a must and if you are having detonation, stop driving it! You will heat it up and damage the engine with detonation.
Who porgrammed the SC for you and why are they not looking at that programming?????
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