How to change Transmission Fluid
Changing Automatic Transmission Fluid.
For most cars, the Maintenance Tune Ups are scheduled at 30K, 60K, 90K and so on. Most of the dealers recommend to change the Transmission Oil and transmission oil filter at 60K. The transmission Oil can't last forever, so it is a good idea to take care for the transmission before something bad happens, and at 30K the transmission oil start breaking down. So you buy a transmission filter kit and start the job. Lift and secure your car. Loose and put pan bolts in a small cup with kerosene or WD-40. With finesse loose the transmission oil pan. Collect and disposal properly the used transmission oil. The amount could be 4 to 5 quarts. This is only the half. The rest is still inside the car. For now disregard the rest of the transmission oil. Focus on the oil pan. You have to clean inside and outside and check the magnet and residue. A black dust is normal. Replace the transmission filter. Just pull it out and snap in the new one. Don't forget that "O" ring sealer is in place. Clean out the surface of transmission block in contact with the pan. It is aluminum and don't tolerate even a scratch. A razor blade in right angle can do the job. Clean with lacquer thinner both surfaces in contact and the bolts. Dry out thoroughly. IF the oil pan is designed for a gasket, you are very lucky. Apply a thin layer of sealing agent, over the transmission oil pan edge, and position the gasket over it. Mount the pan on the transmission surface and torque the bolts at around 170 in- lbs. If the oil pan doesn't accept a gasket, Chrysler like this,than you are in trouble. You have to wait till the transmission oil drip stops.You need to wait overnight, till 24 hours. Clean everything thoroughly with lacquer thinner. Apply RTV around all holes and, create a gasket with sealer.Too much or too little means trouble. Mounting the pan you have to be very precise, one wrong move and you start again from the scratch. If there are big electrical harness obstacles, ask for a person to help. This happen to Chrysler Town & Country. Tight up the bolts with an extension only. Wait at least one hour and tight up to 150 in - lbs, or (12 ft - lbs). Wait at least 24 hours to cure, before filling up with transmission oil.You think are done. Not yet. You have a new filter, clean transmission oil pan, including the magnet, which must be cleaned and put back in place, but half of the transmission fluid is still old and dirty.
You have two options.
Fill out the transmission with new fluid, disconnect the return oil line at the transmission, or cooler, and collect 4 to 6 gallons and disposal the fluid properly. To do so you need to start engine and move the selector to reverse, neutral, drive and back to park. Connect the line and fill out the transmission with new fluid.
Buy 6 to 8 feet vinyl clear house. Insert the house in the dip stick opening up to the bottom, and siphon the oil from transmission to a container positioned on the ground.
You need up to 24 hours to drain the oil. You have to repeat this procedure one more time after a month or so. You have to buy 10 quarts of transmission oil, but this is worth compared with a transmission repair. Keep in mind to buy the specific transmission oil for your car. Check the fluid level with the engine running and add as needed. Check after a week. If level is to high then siphon small amounts and fill up to the mark.
on Aug 23, 2010 | Chrysler Town & Country Cars & Trucks