Question about 1999 Dodge Ram

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Automatic Transmition shifts in and out of the lock up position at low rpms

2500 with the 5.9 Diesel, it is like the tourqe converter can not find its place. It is a rpm situation as it does this at low speeds or faster speeds, but in 4th gear it starts at around 45 mph and quits doing this when I get past 52 mph, only does this with a light throdle.

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  • kelbystucco Nov 06, 2008

    I have the same problem. I even went as far as to put in a new tranny after me and my tranny pro couldn't find the prob. Today he told me to look for a computer for the tranny. It only happens from 45 to 55 mph.

  • Anonymous Dec 03, 2008

    i have the same problem with a 1999 1500 4wd.just started.

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The TPS is usually the problem i find with these ..... Throttle Position Sensor . It gets a glitch in it that you will only see on a lab scope . Cleaning the grounds and sheilding/replacing the alternator only hide the problem for a short while in my experience. I have had some to respond well to the new flash ...only to be back in a month for a TPS. :)

Posted on Apr 01, 2009

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I was having the same trouble with my truck. I am not a mechanic and can not explain it that well but here it goes.

I took my truck to my favorate dealer (really). They found a service bulleton that upgraded the computor, they flashed the ECM and the PCM.( I hope some one knows what that means ). Since then I have had no more problems.
Hope that helps.

Posted on Dec 14, 2008

Strangely enough, the lock up is controlled by a chip, electrical.
Carefully check the connections to both batteries, verify both are not faulty in any way, then remove the battery terminals for 1 hour. This will remove the memory, and reset the chip to learn mode. If this does not resolve it after driving 100 miles, change the trans. fluid, and filter, adjust the trans. bands.
If this does not resolve it, a new trans. with a better lockup mechanism will.

Posted on Oct 04, 2008

  • Jonnyboy2007 Mar 12, 2011

    Thank you very much! I noticed my trucks shifting acting up after I had a shop unhook the batteries to install new battery terminals. After taking my truck to several mechanics they all advised me that I needed a new transmission. I didnt believe it. I tried this and it cured the problem! Thank you VERY VERY much for sharing this!!

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Changes have been made to the diagnostic procedures and associated for testing and/or replacement of the Torque Converter Modulated Clutch/Overdrive Solenoids, the Governor Pressure Sensor, and the Governor Pressure Solenoid on all RE transmissions built since 1996. First steps: BATTERY AND CABLES: Check battery condition and battery cable connections. Check main ground circuit for the PCM. Repair loose or corroded connections. If dual batteries are used verify batteries are properly matched and are in good operating condition. : GENERATOR: Evaluate condition with generator wiring harness disconnected. Generator and/or generator wiring harness may produce excessive radio frequency interference (RFI) which can interfere with PCM input signals. MODELS WITH CUMMINS DIESEL ENGINE: Fuel transfer pump may also produce excessive RFI. To help determine if the fuel transfer pump is a concern, disable the vehicles charging system. Remove the surface charge from the batteries by turning on the head lights; bring battery voltage down to about 12 volts. Test drive the vehicle. If the vehicle stops surging in and out of lock up chances are the fuel transfer is producing RFI. If none of the above helps to isolate problem it would most likely be Clutch/Overdrive Solenoids, the Governor Pressure Sensor (transducer), and/or the Governor Pressure Solenoid.

Posted on Jun 05, 2009

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My story Dealing with Dodge

I had a 1994 Dodge Ram. The Red Dodge Ram I had it malfunctioned and my brake became the throttle. I had to put the truck in reverse then park. to stop, after it was out of control at 80 mph a hill slowed us down. Are you sure its not electrical and the curse control is not giving you trouble? Mine had multifunction switch was not working and the headlight switch burned up. I also found out that Audi had problem with the brake becoming the throttle in the 1980s Daimler Chrysler and Audi were German made. I don't think there is an easy answer. I hope you stay safe. Another man is having strange trouble also. I'm sure there are many more people with trouble with the vehicles. I wish Dodge would step up to the truth. and recall their nightmares. I saw many of their 1996 Dodge trucks at their dealers shop with all the electrical pulled out.

Posted on Mar 22, 2009

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My tranny guy and I found the solution after everything that has been mentioned as a resolution. I'm no mechanic either so I don't have good terminology but put tinfoil 6" long over the main ground wire coming off the alternator then covered that with electric tape. I put over $4,000.00 in fixing this including a new tranny. Been 2 weeks, 300 miles and so far so good.

Posted on Dec 15, 2008

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The problem ended up being the throttle relay on the other (engine side) of the fire wall, ran the ground wire direct to the fire wall or to the battery This small solenoid is the culprit and can be taken apart and clean the terminals to check it out, also clean the battery ground. The whole problem is a grounding issue !

Posted on Dec 14, 2008

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