The fluid level in a manual transmission must be checked with the vehicle on a hoist to enable the technician to reach a plug in the bottom of the transmission. To check your automatic transmission fluid, follow these steps: Pull out the dipstick. With the gearshift in Neutral or Park and the parking brake on, let your engine run.
This puts checking the transmission fluid level beyond the capabilities of the average car owner. So if your car doesn’t have a dipstick, you should have your local transmission shop or dealership check the transmission fluid level at least a couple times a year, even if you don’t notice a problem with transmission operation.
So, when checking if it’s hot, you can’t do that check if you just drove 50 miles across the desert because the fluid will have expanded. Transmission fluid expands and keeps expanding the hotter it gets. Dipsticks are calibrated to "normal" hot operating temperature (i.e., the 10 mile suggested drive; longer in winter).
In order to get an accurate transmission fluid reading, you will need to check it while your transmission is running and the fluid is warm. Keep your car in park, with the handbrake on, while you check the transmission fluid. Note that some vehicles are checked in the neutral position.
Engine oil doesn't expand as much as transmission fluid, so can be checked hot or cold. While engine oil is important to how an engine operates, the level isn't as imperative as transmission fluid. Transmissions are very sensitive to line pressure. As you get more transmission fluid into the transmission, the pressures rise.
The automated transmission fluid degree is extraordinary than oil, you DO want to examine it with the engine going for walks, and the trans in park (neutral for some automobiles). EDIT: anyone telling you to assess ATF level with the engine off has no idea what the **** they're talking about.
Checking Your Transmission Fluid Level . Once you have located the dipstick, you can now check your fluid level: Ensuring that your vehicle is in Park or Neutral and that your parking brake is on, start running your engine. Leave the engine running for a moment as you pull out the dipstick, ensuring the engine is warm as you check the fluid level.
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