Thanks for the reply,Bernd!
I don't have anything to read any transmission sensors
with. My Elmscan 5 will do the engine sensors
(only,apparently). About all I can do is measure
actual fluid pressure with a gauge and look at my
speedometer.
I'm a little concerned that I can't find anyone on the
internet that has had either the sensor or the
solenoid cause erratic surging and intermittent
performance. All I can find is complaints of second
gear starts and failure to upshift. Maybe I need to
verify that the fuel system and the engine vacuum is
not causing anything before I blame the transmission
for causing that one symptom for sure.
Steve P.
--- "Bernd D. Ratsch" <bernd@dodgetrucks.org> wrote:
>
> You can look at the pulse-width of the sensor and
> line pressure. If the
> sensor isn't showing 1psi per mph from 0-30mph, it's
> bad (very common
> problem). As for using the HVAC gauge, I wouldn't
> run ATF through that
> gauge. You can use a fuel pressure gauge (0-100psi)
> and use the line taps
> on the side of the transmission.
>
> - Bernd
>
> -----Original Message-----
> From: Steve Preston [mailto:steveophonic@yahoo.com]
> Sent: Friday, July 20, 2007 8:37 PM
> To: dakota-truck@dakota-truck.net
> Subject: DML: Checking transmission line pressure
>
>
> Sup!
>
> I need to determine which is bad: the governor
> pressure sensor,or the solenoid. I'd hate to spend
> the
> considerable sum for a part that I don't need,if
> only
> one of them is bad. I've read that if the line
> pressure doesn't equate to 1 psi per mph as I
> drive,the transducer is bad,and if the pressure is
> right,the sensor is causing the problem. This is on
> my
> work truck (2003 3.9 CC 42RE)
> that runs crappy (feels like engine miss and doesn't
> want to upshift unless I back off the gas.) I spent
> this afternoon checking the ignition system,and I'm
> fairly sure the engine isn't causing it.
>
> First off,what's a wet gauge? I assume it measures
> transmission fluid pressure? Does anyone know if an
> HVAC suction side pressure gauge would work?
>
> I want to do some actual troubleshooting and track
> this problem down. Unfortunately,my scanner doesn't
> do
> anything but engine sensors,and I haven't been able
> to
> find anything wrong there.
>
> Thanks,
>
> Steve P.
>
>
>
>
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>
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This archive was generated by hypermail 2b29 : Wed Aug 01 2007 - 00:15:21 EDT