No, I don't believe it "should" be at all. Given the nature of many modern auto
trannies though I don't think I would want to test them more than necessary by
forcing them into a lower gear for no good reason.
I think the general idea the manual has is for descending a long moutain or
something where the lower gear can help hold you back so your brakes don't
overheat and fail. In the 4-speed overdrive type automatics I've driven, I
usually drive in 3rd/plain drive when in a 35mph or slower zone so the
engine helps hold things back a bit...a hair less brake usage that way...
yeah, say your in the middle of Kentucky or someplace and your on those
twisty whindy roads, your constantly going downhill sometimes, thats the
only way I would ever use downshifting as a helper to the brakes, gosh it
isnt a semi you dont need to do that everyplace. Next thing will be
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