Transmission service

It's possible that the filter and/or fluid is contaminated and needs replaced yes. It's a sealed unit though and requires special procedures for filling. There are no exact capacities for a service since it is filled using the procedure in the attachments below.I would start by pumping 3 quarts in to start, could use up to 6 depending on how long it drained

DRAINING & REFILLING
NOTE:For appropriate transmissions, use the Automatic Transmission Flush and Fill Machine (211-00018) or the Automatic Transmission Flush and Fill Machine (199-00010) or equivalent.

Draining
With the vehicle in Park, position it on a hoist. Set the vehicle as close to level as possible.
Remove the drain plug (large plug) and allow the fluid to drain. See Fig. 9 .
Remove transmission fluid pan screws and fluid pan. Remove transmission fluid pan gasket, filter screws and filter. See Fig. 10 . Remove transmission fluid pan magnet.
Fig. 9: Removing/Installing Drain Pan, Gasket & Filter
Courtesy of FORD MOTOR CO.
Fig. 10: Identifying Transmission Fluid Filter Bolts
Courtesy of FORD MOTOR CO.
Refilling
To install fluid pan, gasket and filter, reverse removal procedures.
Hold the larger drain plug with a wrench and remove the small (center) fluid level indicating plug using a 3/16" Allen key. Install the Fluid Level & Fill Plug Adapter (307-437) into the pan. See Fig. 4 .

Prior to filling the Fluid Transporter/Evacuator/Injector (307-D465) with clean transmission fluid, make sure that the canister is clean. See Fig. 5 .

Fill the special tool with clean automatic transmission fluid. Hang the fluid transporter/evacuator/injector under the vehicle, upright and close to the transmission.
Connect the open end of the fluid hose from the fluid transporter/evacuator/injector to the fluid level and fill plug adapter at the bottom of the transmission fluid pan. See Fig. 6 .
Apply a maximum of 30 psi (206.85 kPa) to the open end of the vacuum/pressure hose from the Rubber Tip Air Nozzle (100-D009). See Fig. 7 . Fluid will immediately start flowing out of the special tool into the transmission fluid pan.
Add 2 or 3 quarts of transmission fluid into the fluid pan. Stop the process by releasing the air pressure and removing the air nozzle from the end of the hose. Engine idle speed is approximately 650 RPM. Start and run the engine until the transmission fluid temperature is between 80-120 °F (27-49 °C).
Inspect the fluid level in the special tool. If the fluid drains back into the canister, the transmission is full. If no fluid drains back, more fluid will need to be added. Repeat steps 6 and 7 .
Once the transmission is full, place a hand vacuum pump on the open end of the vacuum/pressure hose of the Vacuum Pump Kit (416-D002) and apply vacuum to the system. See Fig. 8 . This will pull out any extra fluid trapped in the system and direct it into the container.
Allow the fluid to drain. When the fluid comes out as a thin stream or drip, the fluid is at the correct level. Reinstall the small (center) fluid level indicating plug using a 3/16" Allen key.

First thing you need to do is make sure you are on level ground. Even the slight incline of a driveway will make a difference. If you look on the bottom of the pan you will see a drain plug with a torx bit plug inside it. The outer plug is a drain plug. You're gonna love this, the inner plug is the fill plug. They make a special tool to fill it with, but it can be done quart-by-quart. After you service the trans, add three quarts of fluid to the trans, then start it. Place the vehicle in neutral and add the rest of the fluid, one quart at a time. When the trans is overfull it will run out in a steady stream. When it stops running a steady stream, put the inner plug back in. Make sure you are using mercon V (5) fluid. If you add regular trans fluid, you just bought yourself a trans. If you have any other questions, feel free to ask.
Dave

Was the leak from one of the cooling lines at the radiator?

It sounds like the transmission is overheating. ATF expands when it gets hot. Is there a trany cooler on the vehicle?

I would check the cooler to make sure nothing is slowing the flow of ATF. Something is causing it to overheat.

Hello,

Here is a video that sown the job being done on a similar car the process is the same with how you fill the unit in the diagrams below

https://youtu.be/NUOBl4bqtss

Check out the diagrams (Below). Please let us know if you need anything else to get the problem fixed.