According to TCI, the ideal operating temperature for automatic transmission fluid is between 175 and 225 degrees. At approximately 240 degrees, important additives in automatic transmission fluid (ATF) begin to cook. The result is the formation of varnish inside the transmission.
What temperature is too hot for transmission?
#1 Cause of Failure
The optimal temperature range for transmission fluid is 175 to 220 degrees. Above that, for every 20 degrees bad things happen, starting with formation of varnish at 240 degrees, followed by seals hardening, plates slipping, seals and clutches burn out, carbon is formed, and, ultimately, failure.
What is the normal operating temperature of an automatic transmission?
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.
Is 180 too hot for a transmission?
So, this manual indicates that the normal automatic transmission oil temperature range is 180F – 200F. If you have a temperature gauge on your transmission oil and find that it exceeds those numbers you should be adding an extra transmission oil cooler to your vehicle.
How do you cool down an overheating transmission?
Allowing the car to idle in neutral, while sitting at red lights, in congested traffic or at rail road tracks, reduces the strain on the transmission, allowing the transmission to cool.
How do you know if your transmission is overheating?
Is My Transmission Overheating?
- A sudden experience of a burning odor inside and outside the vehicle.
- The gears “slipping” when accelerating or decelerating.
- A feeling of hesitation or delayed gear shift when you are driving.
- Any grinding or shaking sensation that occurs while accelerating or while idling.
What is a low transmission temperature?
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. The fluid can also fail to lubricate parts when it is too cold, wearing parts down unnecessarily.
How do you warm up an automatic transmission?
Start the engine, allow it to stabilize and idle for perhaps 15 seconds, shift into gear, wait a few seconds for the transmission to fully engage then drive the vehicle up to temperature gently.
What is too hot for an Allison transmission?
Temperatures from 230-240 have been reached with no damage to the transmission. If you are seeing temps above 225 degrees on a regular basis you should check your fluid level. Fluid levels to high may cause excessive temperature. … These transmissions will run from 200-230 in the summer months when towing in hilly areas.
Is 165 a good transmission temp?
At highway speeds, it is usually about 165F.
Is 185 to hot for a transmission?
Since automatic transmissions are located closer to the middle of the car, how do you know when your gears are running a little too hot? … A transmission operating temperature normally tends to be anywhere from 175 to 200 degrees, with the fluid inside ranging between 185-194 degrees Fahrenheit.
What is a good coolant temp?
Most experts agree that your engine should run between 195 degrees and 220 degrees. In ideal situations, your needle will maintain a posture right in the middle of your gauge.
What causes transmission to run hot?
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.
Can a transmission run too cool?
Heat is a huge cause of transmission failures but running too cool is bad also. Just as an engine has to run hot enough the trans has to run hot enough to get rid of any condensation that builds up inside and to keep the viscosity at the correct level for best operation.