Changing her automatic transmission fluid isn"t the easiest task in the world, but you have the right to do it in your own garage with sufficient time.

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This article uses to the Jeep cool Cherokee WJ (1999-2004).

Changing your transmission fluid on your jeep is a little bit involved procedure and fairly messy, but you have the right to do that yourself and save a many money in the long run. An altering the transmission fluid involves removing the pan indigenous beneath your jeep, i beg your pardon gives accessibility to her filters. Her 45RFE transmission has two distinctive filters and while your have it opened up up, you could as well readjust out this filters in ~ the exact same time. It is no a daunting job, but it takes some patience and, again, that is rather messy. A expert is going to fee you a quite chunk of adjust to execute this job due to the fact that of the labor hrs it will certainly take, so conserve yourself a great deal the money and get this task done yourself.


Materials NeededRatchet and 8mm socket through extensionT25 Torx bitTwo filters and gasket, or a kit that contains all needed parts5-8 quarts that Mopar ATF +4 automatic infection fluidCatch pan or basinPlenty that shop ragsTorque wrench qualified of measure up to 150 foot pounds per inch

Step 1 – Jack up her jeep

Use a hydraulic floor jack and two jack stands to raise the front end of her jeep, and also be sure to usage the authorized jack points.

Figure 1. Be certain to raise and also secure your Jeep by the approved jack points.
Pro Tip

Always use jack stands as soon as working under her vehicle.

Step 2 – situate transmission fluid pan and also remove

The transmission liquid pan is located under the engine compartment and also is mounted with about six 8mm bolts. Slide your record pan or container into position very first and remove the bolts native one end of the pan. Fluid should start putting out as soon as you eliminate the first couple of bolts native one finish of the pan. As soon as the fluid drain subsides, eliminate the other bolts and also prepare for a mess. Clean up any type of spills immediately, as the ingredient is supervisor slick. Collection the pan aside.

Figure 2. Locate the transmission liquid pan under her Jeep and also remove the six 8mm mounting bolts.

Step 3 – remove the internal ATF filter cartridge

Once the pan is removed, you"ll see the level internal automatic transmission liquid cartridge. This is the very first filter to replace. That is hosted in place by a single T25 Torx bit. Eliminate this bit, and also twist the cartridge ago and soon while pulling down to remove it. There will certainly be liquid inside, so prepare because that it to pour out right into your record basin. Friend will notice on the nozzle the pops out there is a plastic fitting. Remove this fitting, together you will have to re-use it. It seats up right into the transmission fluid port from whereby you pulled the nozzle out.

Figure 3. Remove the T25 bit and pull this cartridge out. Be ready for a bunch of liquid to pour out.
Figure 4. If her kit or instead of cartridge did not come v a instead of O-ring, you"ll should save this one because that re-use.

Step 4 – remove the transmission fluid filter

This filter could be a actual bear come remove. It looks choose a traditional oil filter and also it"s ideal to usage a one-of-a-kind wrench designed because that this filter. Mopar filter wrench 8321 will certainly make this task lot easier. Again, this filter will have actually plenty of fluid inside, for this reason take care when removing.

Figure 5. Remove this an additional ATF filter v the proper wrench to do it lot easier.

Step 5 – check condition the your offered transmission fluid

Run a magnet v the old liquid that you caught in your record basin. Make sure you aren"t choose up an extreme amount of metal particles. This can indicate a potential trouble with her transmission. If you have no slippage or various other shifting issues, the is most likely okay. Examine the condition of the fluid for smell and color. Usage the chart listed below to help determine infection condition.

Figure 6. Use this chart to identify the problem of your transmission.

Step 6 – Clean up gasket residue top top pan mounting plates

Around the edge of both the fluid pan and also under the engine friend will discover a mess of old gasket residue. Both surfaces need to be cleaned fine in stimulate to get a an excellent seal and prevent any leaks. Use a plastic putty knife rather than metal to avoid gouging the steel surfaces. You have the right to replace with a brand-new gasket or part folks opt to usage RTV sealant instead, or a combination of both.

Figure 7. Be certain to completely clean all the old gasket reside native this pan, and where the mounts under the engine.

Step 7 – replace both filters

Replace the second filter first. Make sure that the is around 1/2 come 3/4 of a turn previous snug. As soon as replacing the major filter cartridge, girlfriend MUST an initial seat the O-ring right into the port. Carry out not effort to re-install both together one unit, or friend can damage your transmission. Chair the O-ring in place and also then tap into place v the handle finish of a screwdriver and also a little hammer. Make certain it is seated flush in the port. When you have actually that in place, re-install the major filter cartridge and replace the T25 bit. You execute not must torque this bit, yet make sure it is tightened securely.

Figure 8. Replace both of these filters with your brand-new ones after ~ you have actually cleaned the gasket residue native the pan mounting surface.

Step 8 – replace the transmission liquid pan

After you have actually cleaned the old gasket residue and replaced the pan gasket, or offered RTV sealant, you have the right to re-mount it to the engine. If you are using a new gasket, insert a few of the bolts into the pan an initial to make sure of precise placement the the gasket. If you space using RTV, girlfriend will have to wait the stated curing time on the tube prior to running her engine. The 6 8mm bolts will should be torqued to 105 lbs/inch as soon as reinstalling the fluid pan.

Figure 9. Inserting a few bolts into the holes will certainly ensure the correct gasket placement.

Step 9 – Add brand-new ATF +4

Once the pan has been torqued come specification, you can add new ATF +4 fluid. Be sure not to overfill. It need to take around 5 quarts, but maybe a little more, just be certain to continually examine the level after ~ you have actually used about the first 5 quarts. Allow it collection for a while and shift through the gears without starting the engine. This will make certain that the fluid has gone through and settled in place. Re-check the liquid levels and add much more as needed. Be certain to wait the mentioned curing time if you offered RTV before beginning the engine and also take it for a check spin.

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Figure 10. Transition through gears after including the ATF +4 to make certain it gets functioned in well.