'03BlkMM
06-04-2005, 10:48 AM
I have been playing around with the shift points on my car for awhile now with quicktune and the xcalibrator and notice that they seem to drift around a lot on the 1-2 shift. The 2-3 seems to be rock steady no matter how I shift it. I finally realized over the last day that the car shifts differently based on what I'm doing. If I take off from a stop with the shifter in "D" it will shift out about 5900rpms everytime. If I start out with the shifter in 1st and then immediately move it to "D" once I floor it it will shift at 6100-6200rpms. I use this method in rolling street start type races as it avoids the pause while the tranny is kicking down, I usually have shifted it to "D" before the RPMS even reach 3500 so its not my late shifting causing the issue. It also shifts the 1-2 at 6100-6200rpms if I floor it at a steady cruise of say 15-30 mph and it kicks down to 1st gear. Just wondering if anybody else has noticed this difference in shifting on their car.
Just for reference, I recently (approx 1k mi ago) changed the tranny filter and flushed a whole case of Mercon V fluid thru the transmission. I thought I'd cover that as I figured some would say to change the fluid and filter.
Just for reference, I recently (approx 1k mi ago) changed the tranny filter and flushed a whole case of Mercon V fluid thru the transmission. I thought I'd cover that as I figured some would say to change the fluid and filter.