Did it ever occur to you that on cars built in the last 15 years develop engine repair problems or have a transmission failure because the TCM, transmission control module is the culprit? In essence the newer the car the more operations are computer controlled, making the entire system a team that needs to work together. One lazy team member hurts the performance of the other properly performing teammates.
To put it mildly, only a fool would ignore the TCM and related components anytime your automobile transmission acts up. I say this because gradually over the last 15 or so years cars operate all functions through a computerized system. The operations commanded by a computer are ever increasing. Very advance systems need computers that are more involved in your cars drive ability.
Computers develop isolated problem areas that only affect one part of the car, and in some cases a computer can have a total failure. Which may have a profoundly bad effect on your engine or transmission. Either way, the TCM will need replacing. Since all TCM modules are solid state circuitry and sealed in epoxy, mere mortals can not fix them.
FYI: The best choice in searching for computer is not the dealer. It is your trusty transmission replacement supplier. Since the TCM, or onboard computer is an integral part of the direct performance of your car, it is logical to call the premier transmission suppliers for a used low-mileage TCM. Since they have access to the same cars that the used transmissions come from. Meaning that the preponderance of low mileage wrecked have good computers in them. Realistically speaking, some of the new cars or trucks have computers that control the engine and transmission and suspension, which can cost from about 500 dollars new to close to 1000 dollars from the dealer. Most engine supply companies have access to used TCMs for about 100 dollars. What is interesting is that in most cases you get the same guarantee a new one would get for much more money. One year…
As a starting point, if a transmission repair is needed, the first thing your mechanic should do is hook up a scan tool and test the ECM, TCM and every input, sensor, module, controller, etc. on the car. So many times it turns out that the problem does not require you to replace the engine or transmission, or if replacement is needed, the ECM or TCM transmission control module may be the culprit. So, in essence, you can put a replacement transmission in your car and still have a problem.
The company that stands out to me is GotTransmissions.com. Mostly because the owner Brian knows about the issues of dealing with computers and has made a point of having access to low mileage ECMs and related components for pennies on the dollar. In fact if you were to call them for any reason, in the course of the conversation, your representative would discuss the computer with you.
Be a wise consumer, ask the technician at the repair shop checking out your car if the electrical system has been scanned or is going to be. If the answer is anything less than “right now”, take your business to another shop.
BTW, if the only part your car needs is an TCM, call GotTransmissions.com, an insightful company thinking in advance to deliver the critical parts that get you on the road asap. Call us @ 1-888-344-8044, we will gladly sell you a computer only.
My 2006 chevy cobalt was having shifting problems and making weird when i try to go faster. Took it to a chevy dealership and auto repair shop and they ran a diagnostic and both got same result of a tcm replacement. I had code p700. The dealership gave me the part number and I went on autopart warehouse and got it for 114.37 brand new. For labor and everything i was out of $309 not bad to me… Hope this helps
Ive got a 2000 mitsuibishi montero sport with 57000original mile that slip when trying to shift from 2nd to 3rd (while maintaining steady speed 30 mph)and bangs going into gear (sometimes). Sound Like a TCM ? Thanks
Looking for information into a Transmission Control Module for a 2000 Chrysler Town and Country Van. I have a van that does a sudden hard downshift occasionally when slowing down from driving speed to under 10 mph. Additionally, the tachometer and the speedometer needle flucuate erractically at times while driving and the “check engine soon” light comes on. I have had a mechanic scan the OBD with a scanner simular to the kind used at the dealer. The OBD sent a code to the reader of P700 TCM. I know what the TCM is and to get what the code of P700 was I called the local dealer service department. They called me back and told me that the P700 code meant that there was an internal short in the TCM.
My 2005 jeep wrangler TJ has a error code P0700
I suspect the tcm. It has a 242ci engine. Any clues or parts for a fix?
Hi, I’m having trouble with my 2004 Mitsubishi Pajero 3.2 litre turbo diesel 5 speed auto. From start, placing it in drive, it will clunk into 1st gear, then go OK through to 5th, before slamming back into 3rd. At this point the neutral light flashes and it is locked into 3rd. If you stop, turn the engine off and back on and use the tip-tronic, you can go from 1st to 4th and back all day long, but the moment you go into 5th, the same thing occurs. The scan reveals the problem is “code 45 5th gear no sync”. The dealer recommends to follow flow charts and do further testing on the valve body. A similar problem occurred once before and similar scan results, resulted in massive and expensive transmission exploration, only to find the problem was computer oriented. Believe it or not, the problem was fixed by opening the computer and spraying some kind of freeze spray on it, drying it and putting it back together. The fix lasted about 20,000 kms.
The latest problem occurred randomly, with no lead up and I am convinced it is computer related. I am having trouble sourcing a second hand computer to replace and try out.
Do you have any suggestions?
Are you able to supply me with the relevant second hand transmission computer?
Regards,
Bodie…
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So are you saying that complete computer failure in a car can affect the transmission. I had a situation a few weeks ago where my computer got completely water logged and fried. Now my transmission is making odd noises that it never had before. could the computer issue have sparked these new problems? Do you know of another website i could find out my information on this issue?