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Do you put transmission fluid in when a car is running?
I checked my transmission fluid level, and it’s low. I’m going to add some fluid, but do you put transmission fluid in when a car is running?
Rachel Rigolino · Updated on
Reviewed by Shannon Martin, Licensed Insurance Agent.
Yes, many experts say the best policy is to add transmission fluid when a car is idling because you don’t want to run the risk of overfilling. However, put your car in park and apply the parking brake!
After putting in the fluid, you’ll want to put your foot on the brake and run through the gears, which will make sure the fluid circulates. Then, check your transmission fluid level again. Add more if needed, but only a bit at a time, rechecking levels as often as necessary.
As with any DIY project, always check your owner’s manual for precise directions!
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