Transmission over temp

The check engine light is on. At times it don't won't to crank. Had been driving without oil cap have oil cap now and sometimes it act has if it don't want to change gears

My car has 137441 miles.
My car has an automatic transmission.

Experienced mechanics share their insights in answering this question :
The shifting problem you are having may be a sign of low transmission fluid or a faulty transmission control solenoid. As you know, automatic transmissions use pressurized hydraulic fluid to change gears. Every time a gear change is required, the car’s computer activates a transmission solenoid, which directs transmission fluid into the valve body to engage the correct gear. When this is faulty or not working properly, this can cause a delay in gear shifting or in some cases cause the car to not shift at all. I would recommend having an expert from YourMechanic come to your location to take the car for a test drive to more specifically determine the cause for this.

Your check engine light may come on for many different reasons such as a faulty mass air flow sensor, a faulty O2 sensor, a bad catalytic converter, bad spark plugs or wires and many other reasons. Unfortunately due to the wide range of possibilities for the check engine light to come on, the best way to narrow down the scope of what may be causing this is to have the vehicle hooked up to a scanning tool to download any potential fault codes that may have registered in the computer. I would recommend having an expert from YourMechanic come to your location to take a look at your vehicle to determine what may be causing your check engine light to come on.

How to Identify and Fix Common car Problems ?

Our sources include academic articles, blog posts, and personal essays from experienced mechanics :

Low fluid levels or old transmission fluid causes friction between the parts and causes overheating. Fluid problems are the most common reason for transmissions overheating.
An overheating transmission usually means there is already some sort of internal damage or a transmission fluid issue, such as a leak, low fluid level or just old/dirty fluid running through the system. It can also happen with too much transmission fluid, which causes excess pressure within the transmission.
This indicator light is warning you that the transmission fluid`s temperature too high, which can lead to transmission failure. Transmission failures are one of a vehicle owner`s worst nightmares, as they are notoriously expensive to repair, and one of the things mostly to damage your transmission is overheating.
The more you drive with an overheating transmission, the more you risk serious damage to your car`s transmission. Instead, you should pull off to the side of the road as soon as possible and wait for your engine and transmission to cool down – or even better, get your car towed to a mechanic.
External coolers are highly effective in keeping your transmission cool or at a regulated temperature, irrespective of the increased stress. External coolers will also work to minimize friction to the transmission, another cause of severe damage.
An overheated vehicle is a common cause of mechanical breakdown and can be the cause of significant engine and transmission damage, therefore establishing the problem associated with the overheating is important for maintaining a well-running vehicle.
Thermometrics Transmission Fluid Temperature Sensor (TFT) measures the temperature of transmission fluid. It provides input to the control module to modify shift patterns for smoother shifting in automatic transmissions, and also provides over-temperature protection by locking the torque convertor.
Most of the time it should run about 210-220.
P0218: Transmission Over Temperature

This code usually means the transmission is overheating. This can occur if the transmission fluid is low, the lines are restricted or the cooling fan is not operating. It may also indicate that the fluid sensor needs to be replaced.

Transmission Warning Light

If this warning light turns on, you should immediately stop your vehicle and turn it off when it`s safe to do so. Your transmission could be overheating when there are low transmission fluid levels, worn internal components, and several other reasons.

Yes, a failing coolant temp sensor can illuminate the MIL and cause the engine to run rich or lean. The transmission may shift incorrectly or not lock-up the torque converter.
Did you know that an overheating automatic transmission can cause the engine to overheat? In cars with automatic transmissions there is a separate transmission radiator cooler which sits inside the radiator tank. Transmission fluid is processed through this separate tank and cooled.
It should be bright red in color. If it looks/smells burnt or the levels are low, you`ll want to get a standard transmission service as soon as possible.
Normal operating temperature for an automatic transmission is about the same as the engine temperature, i.e., about 195°F. The temperature inside the torque converter, while pulling a big load from a standing start, could easily rise above 350°F. Fluid breakdown often results in harsh shifting and slip-bump concerns.
Viscosity change: The viscosity of transmission fluid changes and gets thicker in the cold. The ideal temperature for it is 175 degrees, plus or minus 25 degrees, and when the transmission gets below zero degrees, it gets too thick.
If you`re going to be checking the transmission fluid level at home, it`s a good idea to warm up the car before you do so. If the car is checked while the engine is cold, it might give an inaccurate reading when you use the dipstick. After driving for about 10 minutes, park on an even surface and leave it running.
But a blown fuse No. 38 becomes a likely candidate causing a loss of power to the transmission solenoids.
Disconnect the sensor from the housing on the transmission, as indicated in the repair manual for your car. Disconnect the sensor`s wire coupling. Using the multimeter`s voltmeter connect the probes to the ground and reference wires in the connector. If no voltage is received, the sensor is faulty.
If your car is still running as normal even though the engine overheated (aside from the rising temperature), you can turn your heat on while you wait for assistance as this will help to pull heat off the engine and might help to salvage it if possible.
An overheating engine won`t resolve on its own, even if it seems to be fixed after you add a little coolant. It will only get worse if left unaddressed.
An overheating transmission usually means there is already some sort of internal damage or a transmission fluid issue, such as a leak, low fluid level or just old/dirty fluid running through the system. It can also happen with too much transmission fluid, which causes excess pressure within the transmission.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

There is automatic transmission fluid in a manual transmission. Is it okay to leave or do I need manual transmission fluid?
ANSWER : This would depend on what the manufacturer recommends. Many manual transmissions do take automatic transmission fluid. If your transmission has ATF in it, it is very likely that it is supposed to have that in there. If not, it is likely that the transmission would not function properly with the wrong fluid. Many manual transmissions will also take engine oil as a lubricant. The best way to know for sure is to check your owner’s manual or call your local General Motors dealership to inquire.

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2013 Ford Focus Transmission Issue. Is it worth keeping the car?
ANSWER : Hi There,
This is a known issue in this generation Ford Focus and some Fiestas with the "Power Shift" transmission and there have been numerous recalls and lawsuits. Although, it is would be difficult to determine how much longer your transmission will last given the fact that you have many new parts, I would not recommend junking the car as it may still provide some valuable life left for you. I would recommend taking it to the dealer to see if these parts may be covered under the recall.

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transmission overtemp
ANSWER : Hi there. If you are going to have the transmission flushed and filters changed, I would recommend having them also check the transmission cooler to see if there is some failure there. Usually when you have this type of transmission temperature problem it’s due to either an obstruction of fluid or issues with the cooler. If the temperature issue was for a short period, it should be OK.

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Kia Optima 2004 v6 LX new engine old transmission no problems before with transmission now my transmission is shifting a high rpm
ANSWER : Hi There,
This may be an issue related to the communication of the PCM and the TCM (Transmission control module). As you may know, the TCM relies on the PCM to transmit information related to RPM’s, which the TCM then uses to determine when to direct the transmission to shift. The transmission control module has various sensors such as vehicle speed sensors, wheel speed sensors, throttle position sensors, turbine speed sensor, and transmission fluid temperature sensors that all direct information to it in order for it to perform it’s function. Other functions controlled by the TCM are components such as a kick down switch, traction control system, and cruise control module. Any of these may also affect the way the transmission control module performs and controls the transmission and the shifting of your vehicle. I would suggest having a professional from Your Mechanic come to your location to properly diagnose your transmission problem.

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Transmission fluid comes up out of the transmission vent tube attached to the transmission dipstick tube
ANSWER : Hi there. Fluid seepage out of the vent tube can sometimes be normal, but can also be caused by overfilling. Has a service been performed recently? Perform a fluid level and condition inspection by having the engine at idle, on a level surface, warmed up engine, and remove the dipstick and cleaning it with a shop towel. Reinsert the dipstick and fully remove to a horizontal position for inspection. Make sure the fluid is not milky, very dark, or has contamination. The level should be in the safe zone marked on the stick.

Have an inspection by a qualified technician determine if any problems truly do exist and provide you with some assurance. YourMechanic has several technicians available that can assist you with a transmission leak inspection and can perform a transmission fluid service if needed.

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Can too much transmission fluid cause speedometer malfunctions?
ANSWER : Hi there. In most cases when you overfill the transmission fluid it can cause excessive foaming of the fluid or possible internal component failure due to excessive pressure inside the hydraulic lines. Sensors like the speed sensors however are rarely impacted by this situation. However, in regards to the possibility of probability of this; I would say perhaps a 10% chance.

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Bought a 1999 Chevy Z71 for very cheap. The transmission is out. How should this be fixed?
ANSWER : Hi there. The 4l60e transmission could have two things wrong with it. Either the park arm is not disengaging inside the transmission making the transmission load up but not rotate the drive shaft or the transmission is low on oil. Check the oil on the transmission dip stick and see what the level is. The level must be checked with the engine running. If the oil level is at the full mark, then it is possible that the torque converter may have damaged the pump.

Remove a cooler line and put it into a bucket, and for a brief moment start up the engine and shut it off. If oil sprays out of the cooler line, then the pump is producing pressure. However, if no oil comes out of the cool line, then the pump is not working.

If you need further assistance troubleshooting your transmission, then I recommend having the transmission problem diagnosed by a local expert, such as one from YourMechanic. You will be be able to make a better decision about the car after finding out exactly what’s wrong with it.

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Can I add Lucas oil "transmission fix" to my transmission fluid to see if it helps my issue.
ANSWER : Adding an additive to the transmission to try and fix a problem will not work in most instances and should only be used as a last resort before getting a transmission overhaul.

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