Please choose the correct ending to complete the given sentence: Computers and Electronics: [header] How to change your transmission oil [title] Have your materials ready before propping up the car. [title] Drive the vehicle until it's at normal operating temperature. [step] This allows any built-up sediment to be removed.

Ending1: [title] Raise the car high enough to put it on jack stands. [substeps] Never get under a car supported only by jacks! [title] Move all your tools under the car. Ending2: Use a bubbler to puree all fluids up to a finishing finish. [title] Use an oil pan to coat the interior with oil. Ending3: [title] Pull back the glove drawer and remove that oil tube. [step] If your car has not kept oil coming from the cylinders, it's important that you remove the tube first to make sure that it is in good working order. Ending4: [title] Stop when the oil is completely cool to use. [title] Grip the handstick near the wheels.

Answer format: ending1/ending2/ending3/ending4