>From what I understand there are only two "non-throttle/load/speed" conditions
(assuming everything is working right) where O/D should not engage or should
dis-engage. One is when the tranny temp. is too hot and the other when it is
too cold. I don't think you have to worry about the too hot scenario. ;-)
There is a thermometer of sorts in the tranny which "talks" to the PCM to
activate O/D, so the operative temp. is *not* the engine temp. gauge on the
dash. In my FSM it says the tranny temp. has got to be above 50 deg. F to
activate the O/D system.
I really dunno, but highway speeds at -20 --I wonder if the tranny can get
above 50 deg? I figure a lot of starts, stops and relatively low speed driving
before getting on the highway would warm it up enough but once on the highway
it may get chilled right down below 50? Anybody know how to easily rig up a
tranny temp gauge to find out?
When this happened the first time was it wicked cold out too?
Tom
______________________________ Reply Separator _________________________________
Subject: DML: Intermittent trans problems! (kinda long)
Author: <dakota-truck@buffnet.net> at smtpout
Date: 12/11/99 11:07 AM
Hi everyone. Looks like I get to put the DML to use for the first time.
Anyway, I was driving my Dak today on the expressway, and after passing an
18-wheeler - my transmission refused to shift back into overdrive. This is
the 2nd time this has happened. I pulled over and shut the vehicle off for
about 5 mins (I've had problems of this sort with Chrysler A-604's in the
past) and the Dak still refused to shift into overdrive, it was revving
nearly 3,000 rpm going 65. The weather here lately has been hovering around
-20 farenheit (yes, that's 20 below 0, without the wind chill factor...) I
realize that overdrive is locked out when the engine coolant temperature is
below the 'normal' range - but both times that I lost overdrive, the engine
was at normal operating temperature. The "check engine" and "O/D off"
lights were not illuminated at any time while experiencing this problem.
After sitting for about 2 hours, I took the Dak for a spin, and the
overdrive seems to work now. I checked the ATF level after driving it, it
still looked new (not brown or stinky) and was registering at the proper
level on the dipstick. I STILL love my Dak more than any 4x4 I've owned
(except maybe my 94 XJ Jeep), I just need to get all the problems I've had
with it worked out... Anyway, I really hate going to the dealership here in
Fairbanks, AK for service (experiences with the other unsolved problems) -
so if anyone had any ideas of things I could check on my own, I would
greatly appreciate it!
Oh yeah, my truck is a 1999 Dak CC, 5.2 auto (44-RE) with 3.55 LSD, 31"
tires and approx 16,200 miles.
Thanks in advance!
-Darren Asuncion
dakotaguy1999@yahoo.com
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