Changing your automatic transmission fluid isn"t the easiest task in the world, however you deserve to do the 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 liquid on her jeep is a bit involved procedure and rather messy, however you can do it yourself and also save a the majority of money in the long run. Transforming the infection fluid involves removing the pan indigenous beneath her jeep, i beg your pardon gives access to your filters. Her 45RFE transmission has two distinctive filters and while your have it opened up up, you might as well adjust out this filters at the same time. The is no a difficult job, however it takes part patience and, again, the is rather messy. A expert is walk to fee you a quite chunk of adjust to carry out this job due to the fact that of the labor hours it will take, so conserve yourself a great deal of money and get this task done yourself.


Materials NeededRatchet and 8mm socket with extensionT25 Torx bitTwo filters and also gasket, or a kit that has all required parts5-8 quarts the Mopar ATF +4 automatic transmission fluidCatch pan or basinPlenty of shop ragsTorque wrench capable of measure approximately 150 foot pounds every inch

Step 1 – Jack up your jeep

Use a hydraulic floor jack and also two jack stands to raise the front finish of your jeep, and also be certain to usage the authorized jack points.

Figure 1. Be sure to raise and secure her Jeep through the authorized jack points.
Pro Tip

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

Step 2 – situate transmission liquid pan and also remove

The transmission liquid pan is situated under the engine compartment and is an installed with around six 8mm bolts. Slide your catch pan or basin into position very first and eliminate the bolts from one end of the pan. Liquid should start pouring out as quickly as you eliminate the first few bolts native one end of the pan. As soon as the fluid drain subsides, remove the other bolts and also prepare for a mess. Clean up any spills immediately, together the ingredient is at sight slick. Collection the pan aside.

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

Step 3 – eliminate the inner ATF filter cartridge

Once the pan is removed, you"ll watch the level internal automatic transmission liquid cartridge. This is the an initial filter to replace. It is hosted in location by a solitary T25 Torx bit. Remove this bit, and twist the cartridge ago and forth while pulling down to remove it. There will be liquid inside, so prepare because that it to pour out into your catch basin. Friend will an alert on the nozzle the pops the end there is a plastic fitting. Eliminate this fitting, together you will need to re-use it. It seat up right into the transmission liquid 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 pour out.
Figure 4. If your kit or replacement cartridge did not come through a replacement O-ring, you"ll need to save this one because that re-use.

Step 4 – remove the transmission fluid filter

This filter can be a actual bear come remove. It looks prefer a conventional oil filter and also it"s ideal to usage a unique wrench designed for this filter. Mopar filter wrench 8321 will certainly make this task much easier. Again, this filter will have plenty of fluid inside, so take care when removing.

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

Step 5 – check condition the your provided transmission fluid

Run a magnet through the old fluid that you captured in your record basin. Make certain you aren"t picking up an extreme amount of steel particles. This can indicate a potential problem with your transmission. If you have no slippage or various other shifting issues, the is likely okay. Check the problem of the liquid for smell and also color. Use the chart listed below to help determine transmission condition.

Figure 6. Use this graph to recognize the problem of your transmission.

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

Around the edge of both the liquid pan and under the engine friend will find a mess of old gasket residue. Both surfaces have to be cleaned well in stimulate to obtain a great seal and also prevent any leaks. Use a plastic putty knife fairly than metal to avoid gouging the metal surfaces. You have the right to replace through a brand-new gasket or some folks opt to usage RTV sealant instead, or a combination of both.

Figure 7. Be sure to extensively clean every the old gasket reside native this pan, as well as where the mounts under the engine.

Step 7 – replace both filters

Replace the second filter first. Make sure that it is about 1/2 come 3/4 that a turn past snug. As soon as replacing the primary filter cartridge, friend MUST very first seat the O-ring right into the port. Do not effort to re-install both as one unit, or friend can damage your transmission. Chair the O-ring in place and also then tap right into place v the handle finish of a screwdriver and also a tiny hammer. Make certain it is seated do the washing up in the port. Once you have that in place, re-install the primary filter cartridge and replace the T25 bit. You perform not must torque this bit, however make certain it is tightened securely.

Figure 8. Replace both of this filters with your new ones after you have cleaned the gasket residue from the pan mounting surface.

Step 8 – change the transmission liquid pan

After you have actually cleaned the old gasket residue and also replaced the pan gasket, or offered RTV sealant, you can re-mount it to the engine. If you are using a new gasket, insert a few of the bolts right into the pan an initial to make sure of specific placement of the gasket. If you are using RTV, girlfriend will have to wait the stated curing time ~ above the tube before running her engine. The 6 8mm bolts will should be torqued to 105 lbs/inch once reinstalling the fluid 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 to specification, you have the right to add new ATF +4 fluid. Be sure not to overfill. It must take about 5 quarts, yet maybe a small more, simply be sure to continually inspect the level after ~ you have used around the first 5 quarts. Permit it set for a while and transition through the gears without beginning the engine. This will make certain that the fluid has gone with 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 supplied RTV before beginning the engine and also take it for a check spin.

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