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1 26th November 07:30
commanderdave
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Default 1995 Dodge Diesel Automatic Transmission Guru needed! Help!



Hello all,

I have a 1995 Dodge Diesel with auto trans. Here is my problem:

Between about 65mph and 70mph (where I spend most of my time) the
transmission will drop out of OD. ie..the rpm's increase. Then it will go
back into OD. ie...rpms drop. This happens at low loads, typically a level
road, or even a very slight downgrade. It will keep cycling every 30 seconds
to a minute. This is a major pain in the ass! If i get over 70 problems goes
away. If i am pulling a grade at any speed problem goes away.

Hope a smart Dodge guy takes pity on me and tells me what the hell is going
on. Thanks for the help...dave
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2 26th November 07:52
joseph myers
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Default 1995 Dodge Diesel Automatic Transmission Guru needed! Help!



http://www.turbodiesel.com
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3 26th November 07:52
roy
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Default 1995 Dodge Diesel Automatic Transmission Guru needed! Help!


Could be the TPS.

Roy
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4 26th November 07:52
commanderdave
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Default 1995 Dodge Diesel Automatic Transmission Guru needed! Help!


Hello Roy, I'm afraid I don't know what a "TPS" is. Could you give me a little more info? Thanks...dave
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5 26th November 07:52
commanderdave
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Posts: 1
Default 1995 Dodge Diesel Automatic Transmission Guru needed! Help!


Hello Joeseph, I'm not having much luck with Turbodiesel. They have pop up
windows right and left and keep asking if I want them to be my home page. As
an example I have put in this post thier three first hits for the enquiry
"Transmission Advice". I don't think a psychic, even a "extremely gifted"
one is the answer.


Top Results for: TRANSMISSION ADVICE

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Ask any questions and get ready to be wonderfully amazed by our
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6 26th November 07:52
transsurgeon
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Default 1995 Dodge Diesel Automatic Transmission Guru needed! Help!


Throttle Position Sensor

tells ECM when to shift it

the TPS develops a wear spot at the point where 50-60 mph occurs, when the
computer sees a 'glitch' at that spot, it assumes that the driver has either
floor-boarded the throttle or let off it completely

either way, it unlocks the converter clutch, if the former, it downshifts
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7 26th November 07:52
commanderdave
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Posts: 1
Default 1995 Dodge Diesel Automatic Transmission Guru needed! Help!


Hello Roy, Wow! I know guru stuff when I see it, and your it! Thanks a lot...dave
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8 26th November 10:06
contrail
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Posts: 1
Default 1995 Dodge Diesel Automatic Transmission Guru needed! Help!


It is definently your Throttle Position Sensor. This is quite common with 94 through early 98 trucks. It has to do with electrical interference causing fluctuations in the TPS signal going to the Powertrain Control Module which determines when the transmission should shift into overdrive. It is located on the drivers side ( http://www.dodgeram.org/tech/dsl/Facts/12Ve_locations-l.gif )near the front of the engine. Fixes have included spraying the TPS with contact cleaner, pulling the TPS wiring out of the main wiring harness, installing noise filters, rewiring the TPS wiring with shielded wiring, and even taking apart the TPS and giving it a good cleaning. Below are some links to read regarding this common problem.


http://www.turbodieselregister.com/forums/showthread.php?s=&threadid=91396&highlight=throttle+position+sensor

http://www.turbodieselregister.com/forums/showthread.php?s=&threadid=90740&highlight=throttle+position+sensor

http://www.turbodieselregister.com/forums/showthread.php?s=&threadid=94812

http://www.dodgeram.org/tech/transmission/automatic/TPS_adjust.htm
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9 26th November 10:06
contrail
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Posts: 1
Default 1995 Dodge Diesel Automatic Transmission Guru needed! Help!


It's you TPS. It's a common problem. The shifting is caused by electrical interference in the signal line from the throttle position sensor to the powertrain control module. Several fixes have been suggested including cleaning TPS by spraying it with contact cleaner, pulling the TPS wiring from the main wiring harness, rewiring the TPS wires with shielded wiring from the powertrain control module, installing an electrical noise filter, pulling apart the TPS itself and cleaning it. The TPS itself is a very expensive part and is usauly replaced as a last resort. Check out the following web site for more info.

http://www.dodgeram.org/tech/dsl/Facts/12Ve_locations-l.gif

http://www.turbodieselregister.com/forums/showthread.php?s=&threadid=94812
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10 26th November 10:06
contrail
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Posts: 1
Default 1995 Dodge Diesel Automatic Transmission Guru needed! Help!


It's you TPS. It's a common problem. The shifting is caused by electrical interference in the signal line from the throttle position sensor to the powertrain control module. Several fixes have been suggested including cleaning TPS by spraying it with contact cleaner, pulling the TPS wiring from the main wiring harness, rewiring the TPS wires with shielded wiring from the powertrain control module, installing an electrical noise filter, pulling apart the TPS itself and cleaning it. The TPS itself is a very expensive part and is usauly replaced as a last resort. Check out the following web site for more info.

http://www.dodgeram.org/tech/dsl/Facts/12Ve_locations-l.gif

http://www.turbodieselregister.com/forums/showthread.php?s=&threadid=94812
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