My car acts entirely normal other than the hesitation I mentioned. Today I was able to quantify it a little better. The car shifts out of 1st @ 6300 rpm and drops to around 4800after the shift and that "flat spot" seems to occur as it accelerates from 4800-5000 rpm, then it takes off like a scalded dog. This may be a normal trait of an E-500 & nothing may be wrong. I would be interested in any other feedback.