The startup issue is the PCM forcing limp mode - not a good thing. Governor
pressure is what you need to look at before spending any further money on a
filter/fluid change. If the pressure isn't correct, you'll be needing a
Governor pressure solenoid (and transducer), plus - check what's in the pan
and on the magnet once you do have the pan off.
Pressure should read 1psi per mph up to 20mph in "L". At idle, pressure
should be at "0". If it's jumping around - solenoid is bad. The reason for
changing out the transducer as well is that it senses temperature (along
with pressure too). If it's not reading the correct temp, weird things will
happen (shift points, actual gear selection).
- Bernd
-----Original Message-----
From: david.clement@verizon.net [mailto:david.clement@verizon.net]
Sent: Friday, February 08, 2008 7:12 AM
To: dakota-truck-moderator@bent.twistedbits.net
Subject: DML: 42RE Transmission Acting Up
High folks, been away for some time, my interests have been focused on my
Barracuda.
Anyway, the tranny in my 99 Dakota has started acting up over the past
couple of weeks. It started as a whirring noise when it first started up on
a cold morning and while it was still cold (New England weather) I would get
a slight flare when shifting into third gear, but once warm it was fine. It
has now progressed to the whirring is present all the time when moving in
gears 1-3 and the tranny can't make up it's mind what gear it should be in.
That is, when accelerating from a stop it will shift from first to second
fine then shift to third and immediately back to second or first depending
on how hard I am on the throttle then back into third, it's has done this
repeatably 2 to 3 times before settling down. Once it's shifted to 4th it's
fine. It's not setting the check engine light but I haven't checked for
codes yet.
The other thing that has happened in the past but is not happening now. when
I first start the engine the check engine light will come on and the car
tranny will start out in second gear. If I shut the engine off and restart
it's fine and the check engine light will go out after 3 or 4 start cycles.
I have checked the code and it has been a tranny code but I don't recall
what the number was. This usually has happened when there has been a large
temperature change with a lot of moisture and humidity. I had been pass that
off as an intermitant connection.
The other thing I notice now is that for as long as I have had the truck (5
years and 80k miles, total 140,000)I could hear the modulator solinoid
ticking just before each shift. I am not hearing it now.
Fluid looks good and does not smell burnt, but it's over due for a change
and filter. I have had ATF+4 in it since I got the truck.
Anyone got any good ideas? I am going to drop the pan and change the oil and
filter this week end.
Thanks,
Dave Clement
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