Question about 2005 Dodge Dakota
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Posted on Jan 02, 2017
700 tells you that there has been a "transmission control circuit malfunction", and 740 basically pinpoints the possible culprit, which is "Torque converter clutch control circuit malfunction". If you don't notice any difference in the way the transmission is shifting, especially when you are at cruising speed on highway, or you've basically reached the speed your going to travel at, and are no longer accelerating, your converter normally goes into "lock-up" and your engine RPM's will drop by approx, 200-300 RPM's. When your driving it basically feels like transmission shifted again, slightly. If all feels well, it may just be a one time thing, but being how transmissions are somewhat temperamental, as well as expensive to repair when big problems occur, I would certainly consider getting it in to a dealer for diagnosis at least, and see what they come up with, as it may only be a bad switch, or bad, corroded connection causing the codes. Remember, if it sounds like an expensive,extensive repair, then simply get all the info, and either stop elsewhere for diagnosis of same problem, (without telling them it's already been diagnosed) and see what second opinion has to say. If in doubt after that, get back to us, with diagnosis results, and we'll be glad to help you decide from there. One thing you may want to consider though, is a transmission service, (oil and filter change) if it hasn't been done in a while, just as a preventative maintenance thing. Changing of oil and filter in those transmissions at regular intervals, is a good way of extending the life of them. I recommend the new ,Autopar ATF4 transmission oil, which is more expensive, but guaranteed to last for lifetime under normal driving conditions. Chrysler/Autopar products tend to work better with it, and new filter, although there are many mechanics that will argue that fact, there are just as many mechanics and owners who have seen other oils cause problems, and when they switch to Autopar, those problems disappeared.
Posted on Dec 11, 2009
Testimonial: "Thanks very much!!! I will have it checked out. I have just had a full service on the car and a new filter etc. installed. "
P 0700 = EATX (Electronic Automatic Transmission Communication) Controller DTC Present. = An automatic transmission input DTC has been set in the transmission controller.
P 0740 = Torque Converter Clutch. No RPM Drop at Lockup. = Relationship between engine speed and vehicle speed indicates no torque converter clutch engagement.
Yes the Fluid and Filter Change should take care of this. However, Dodge, Chrysler, and Plymouth Minivans have had alot of Transmission problems over the years. Make sure that whomever changes the Transmission Fluid that they use exactly what is specified. Also, do not let any Mechanic talk you into a Superflush of the Transmission. This procedure does not change the Filter.
Let me know if this helped, or if you have additional information or questions. Feel free to contact me at FixYa.com!
Posted on Jan 15, 2010
SOURCE: RAM 1500 OBD CODE p0700/p0740
I had the same problem and a friend suggested that I get a filter kit for the transmission. My dodge ram 1500 stopped pulling and had to be towed home. I got a filter kit for the transmission and now the truck is runniing good again and the transmission is shifting ok.To get the code off by going to
Auto Advance and used their code reader to erase the code. My truck has 249K on it and I know the trans will not last forever, but as long as it is running ok. I will live with the codes but make sure the trans fluids are changed every 10k.
Posted on Dec 05, 2008
same thing happened in my dodge, come to find out it was the transmission module in the computer, computer needs changing out. I got the true reading from auto zone, transmission shop couldnt get right reading for a year and a half, try auto zone first, they can pinpoint your problem and its free, good luck
Posted on Mar 03, 2009
SOURCE: codes p0700 and p0740 came
P0700 Transmission Control System Malfunction
P0740 Torque Converter Clutch Circuit Malfunction
Sounds like the auto transmission is having or about to have some issues. Normally you will see the engine running faster than is should for the speed you are traveling. get your transmission checked out soon
Posted on Nov 06, 2010
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