That depends on the fluid being added:
Automatic Transmission Fluid (ATF) should be checked after the engine/transmission are warm (has been driven several miles) and fluid can be added while the engine is running. After new fluid is added, the trans should be shifted through all the gears (Park - Reverse - Neutral - Drive - 2nd - 1st - 2nd - Drive - Neutral - Reverse - Park) stopping for a moment in each gear to allow the transmission to get 'in' to the gear, and placed back in Park before rechecking.
Oil should be added without car running, then started and run for a few seconds, turned off and recheck.
Antifreeze should be added to a cold engine, and can be added when you first turn car on, but after the thermostat opens (warm/hot engine) the level will drop and you can overfill it (excess will run out of the reservoir when it cools back off due to pressure it creates). Antifreeze is typically added to the reservoir to the indicators on bottle.
Manual Transmission Fluid does not require engine to be on or off.
All other engine fluids (Brake, Power Steering) should be added with engine off.
Windshield washer fluid can be added at any time.
Hope this helps...
It does not make a difference if the car is hot or cold when you add brake fluid.
no
You sgould add Transmission Fluid through the dipstickwith the car running
No, just add distilled water if it is low of fluid.
yes its best to add it and check it when the car is running and warm
Add transmission fluid via the transmission dipstick tube located near the firewall.
you need to check your transmission fluid while your car or truck is running to get accurate results
Under the car, remove the bolt to transmission fluid container, and allow it to drain. Replace the bolt and add in a few quarts of transmission fluid, start the car and allow it to warm, check the fluid level and add more if needed.
Try changing transmission fluid and filter
It is important to add transmission fluid to car when it needs the fluid. It is added into the red capped tube, that holds the transmission dipstick, through a thin funnel.
You add the trans fluid where the dipstick is at, if it is a manual then you will have to go under the car where the transmission is find the check level plug on the transmission loosen the plug and stick your pinky in it if fluid touches the pinky then your good if not add the fluid there!
The only way to Add transmission fluid is from up underneath the car where the transmission is.unless you can jack the car up yourself.Its designed for the person to take to dealership.but if you can jack it up you can add fluid where the transmmission housing case is