Trans shifting is based on TRANS temp not engine temp. There is a temp
sensor IN the tranny that controls shift patterns. I beleive there are 4
ranges. up to 32*F, 32 to 65 (or so) and over 65 to overheat point, and
overheat and above.
If the trans is below the low limit, or above the high limit, overdrive is
disabled.
TonyC
-----Original Message-----
From: david.clement@verizon.net <david.clement@verizon.net>
To: dakota-truck-moderator@bent.twistedbits.net
<dakota-truck-moderator@bent.twistedbits.net>
Date: Friday, January 16, 2004 8:06 AM
Subject: DML: Transmission Shifting in Sub Zero Temps
>
>We had the coldest morning (-7 F) in my recollection in the Boston area
today.
>I know the tranny does not shift into 4th until it is up to temperature. In
my
>14 years of owning Dakotas that has never been more than a mile or two of
>driving, but it's never been this cold either. Today I drove my entire 14
mile
>commute to work without it shifting to 4th, shifting between 1-3 was
normal.
>
>My question for those that regularly see sub zero temps is it common/normal
for
>it to not shift into 4th on a drive of that length? My engine temp was up
to
>the normal point on the gauge within 3 miles of the house.
>
>Dave Clement
>89 SLT+ CC 4x4
>
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