In my wifes '04 trail blazer, when I tried coasting down a long grade, no matter how many seconds, the engine still maintains the RPM from the moment I shifted out of drive. Another words, I can be cruising along at about 2000 rpm and shift out of gear into neutral, and the engine still revs at 2000 RPM for the entire time Im in neutral. One thing I did notice is that by keeping the same RPM, the thing doesnt jerk when I put it back into gear like my old suburban use to. who knows, maybe its designed to hold RPM to keep from slapping the tranny into the wrong gear?
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