How to Get the Remaining Transmission Fluid Out

1. Park the car on a level surface and place a drain pan under the drain plugs on the bottom of the transmission. Consult the car's manual for the location of the plugs. Standard transmissions will have one and turbo engines will have two. Some engine makes have the plugs near the bottom but on the side of the transmission.
2. Open the hood. Locate and remove the fill plug on the transmission case using a socket wrench. Consult the manual for the exact location. Typically, the fill plug will be located on the driver's side of the vehicle just behind where the transmission case flares up to meet the bell housing (the part which connects to the engine block).
3. Remove the drain plug(s) from the underside of the transmission and wait for the fluid to run out into the waiting pan. When the fluid is barely dripping, replace the drain plug.
4. Assemble the siphon pump according to the instructions provided with the model. Siphon pumps have a handle, a main body (containing the pump piston) and two spigots. The suction spigot, located at the front, draws fluid towards the pump. At the rear of the head of the pump, the exit spigot allows fluid to leave the pump.
5. Cut the 1/4-inch rubber hose into two lengths. One length should be long enough to reach from the suction spigot of the pump into the transmission fill hole while the operator is standing. The other needs to reach from the exit spigot of the pump down to the ground. Attach both lengths to the pump spigot by pushing them over the connection ends.
6. Stand near the vehicle and insert the hose from the suction end of the pump into the transmission through the fill hole. Place the end of the exit hose from the pump in an empty container on the ground.
7. Pour enough transmission fluid (old or new) into the container on the ground to completely submerge the end of the exit hose. Move the pump body around a bit to make sure that the end of the exit hose will not 'pop' out from beneath the surface of the fluid accidentally. Add more fluid to the container if needed to keep the hose end submerged even if the hose moves during the pump operation.
8. Pump the remaining transmission fluid out from vehicle. Follow the directions for the model pump being used to correctly operated it. Fluid with air bubbles will begin to be drawn up into the hose and when all the air is cleared from the pump, there will only be fluid in the line. When air bubbles begin to appear again the transmission is almost completely empty. When no fluid is being drawn out of the transmission, the job is complete.