Changing her automatic transmission fluid isn"t the easiest project in the world, however you can do that in your very own garage with sufficient time.

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

Changing your transmission liquid on your jeep is a little involved procedure and rather messy, yet you can do it yourself and also save a lot of 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 your filters. Your 45RFE transmission has two distinct filters and while your have actually it opened up, you could as well change out this filters in ~ the very same time. The is no a challenging job, however it takes some patience and, again, the is quite messy. A skilled is walk to fee you a pretty chunk of change to do this job since of the labor hrs it will certainly take, so save yourself a great deal that money and also get this task done yourself.


Materials NeededRatchet and 8mm socket v extensionT25 Torx bitTwo filters and also gasket, or a kit that consists of all required 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 your jeep

Use a hydraulic floor jack and two jack stands come raise the front finish of her jeep, and also be certain to use the approved jack points.

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

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

Step 2 – find transmission liquid pan and remove

The transmission fluid pan is located under the engine compartment and is an installed with about six 8mm bolts. Slide your capture pan or container into position first and remove the bolts from one finish of the pan. Liquid should start putting out as quickly as you eliminate the first few bolts indigenous one end of the pan. As soon as the fluid drain subsides, remove the other bolts and prepare for a mess. Clean up any type of spills immediately, together the stuff is supervisor slick. Collection the pan aside.

Figure 2. Locate the transmission fluid pan under your Jeep and remove the 6 8mm mounting bolts.

Step 3 – eliminate the interior ATF filter cartridge

Once the pan is removed, you"ll view the level internal automatic transmission liquid cartridge. This is the an initial filter to replace. That is hosted in place by a single T25 Torx bit. Eliminate this bit, and twist the cartridge ago and forth while pulling under to remove it. There will certainly be liquid inside, therefore prepare for it to pour out into your catch basin. You will notification on the nozzle that pops out there is a plastic fitting. Eliminate this fitting, as you will have to re-use it. It seat up into the transmission fluid port from whereby you pulled the nozzle out.

Figure 3. Eliminate the T25 bit and pull this cartridge out. Be all set for a bunch of fluid to to water out.
Figure 4. If her kit or instead of cartridge did not come v a instead of O-ring, you"ll have to save this one for re-use.

Step 4 – remove the transmission liquid filter

This filter might be a genuine bear to remove. It looks prefer a standard oil filter and also it"s ideal to use a special wrench designed because that this filter. Mopar filter wrench 8321 will certainly make this task much easier. Again, this filter will have actually plenty of fluid inside, so take care when removing.

Figure 5. Remove this second ATF filter with the suitable wrench to do it lot easier.

Step 5 – examine condition that your provided transmission fluid

Run a magnet through the old fluid that you caught in your record basin. Make sure you aren"t choose up an excessive amount of steel particles. This could indicate a potential difficulty with her transmission. If you have actually no slippage or various other shifting issues, the is most likely okay. Inspect the condition of the liquid for smell and also color. Usage the chart below to assist determine transmission condition.

Figure 6. Usage this chart to identify the condition of your transmission.

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

Around the leaf of both the liquid pan and also under the engine friend will discover a mess of old gasket residue. Both surfaces need to be cleaned well in order to acquire a an excellent seal and prevent any type of leaks. Use a plastic putty knife quite than metal to protect against gouging the metal surfaces. You deserve to replace v a new gasket or part folks opt to use RTV sealant instead, or a mix of both.

Figure 7. Be sure to thoroughly clean all the old gasket reside indigenous this pan, and where that mounts under the engine.

Step 7 – replace both filters

Replace the second filter first. Make certain that that is around 1/2 to 3/4 the a turn previous snug. When replacing the primary filter cartridge, girlfriend MUST first seat the O-ring right into the port. Carry out not effort to re-install both as one unit, or you can damages your transmission. Chair the O-ring in place and also then tap right into place with the handle finish of a screwdriver and a small hammer. Make certain it is seated flush in the port. When you have actually that in place, re-install the primary filter cartridge and replace the T25 bit. You do not must torque this bit, however make certain it is tightened securely.

Figure 8. Change both of this filters v your new ones ~ you have actually cleaned the gasket residue from the pan mounting surface.

Step 8 – replace the transmission fluid pan

After you have cleaned the old gasket residue and also replaced the pan gasket, or supplied RTV sealant, you deserve to re-mount it come the engine. If you room using a new gasket, insert a couple of of the bolts right into the pan an initial to make sure of specific placement that the gasket. If you room using RTV, girlfriend will have to wait the stated curing time ~ above the tube before running her engine. The six 8mm bolts will need to be torqued come 105 lbs/inch as soon as reinstalling the liquid pan.

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

Step 9 – Add new ATF +4

Once the pan has been torqued come specification, you can add brand-new ATF +4 fluid. Be sure not come overfill. It need to take about 5 quarts, yet maybe a small more, just be certain to continually inspect the level ~ you have actually used about the very first 5 quarts. Allow it set for a when and shift through the gears without beginning the engine. This will certainly make sure that the liquid has gone with and cleared up in place. Re-check the fluid levels and also add an ext as needed. Be sure to wait the mentioned curing time if you provided RTV before starting the engine and take it because that a test spin.

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Figure 10. Shift through gears after adding the ATF +4 to make sure it gets operated in well.