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      08-24-2008, 04:05 PM   #45
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Drives: E30 M3; Expedition
Join Date: Apr 2007
Location: USA

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Originally Posted by swamp2 View Post
As well look at the size of the oscillations at the beginning of the D3 data and just after that shift. A couple of points show data with negative acceleration. That surely is not real, no way.
Although I agree that it is unlikely for those dips to be real, I think it is too early to say what is and what is not real at this point. Who knows, maybe the issue I brought up with clutch slippage/engagement is plausible since things are happening so fast in the D3 shift, and maybe those oscillations that occur after the interval you have marked as "the shift" are artifacts of the engagement process as the clutch loses and regains traction. Unlikely but not impossible.