Changing her automatic transmission liquid isn"t the easiest job in the world, however you deserve to do the in your very own garage with enough time.

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

Changing her transmission liquid on her jeep is a little involved procedure and rather messy, yet you have the right to do that yourself and save a many money in the lengthy run. Changing the infection fluid involves removing the pan from beneath your jeep, which gives access to her filters. Your 45RFE transmission has two distinct filters and while your have it opened up up, you can as well readjust out these filters at the exact same time. That is not a complicated job, however it takes some patience and, again, it is quite messy. A expert is going to fee you a pretty chunk of readjust to carry out this job since of the labor hours it will take, so save yourself a good deal of money and also get this task done yourself.


Materials NeededRatchet and also 8mm socket with extensionT25 Torx bitTwo filters and also gasket, or a kit that has 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 also two jack stands come raise the front end of her jeep, and also be certain to usage the approved jack points.

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

Always usage jack stands when working under your vehicle.

Step 2 – find transmission liquid pan and remove

The transmission liquid pan is located under the engine compartment and is placed with about six 8mm bolts. On slide your catch pan or container into position first and remove the bolts from one finish of the pan. Liquid should start pouring out as quickly as you remove the first couple of bolts native one finish of the pan. As soon as the fluid drainpipe subsides, eliminate the various other bolts and also prepare because that a mess. Clean up any spills immediately, as the ingredient is super slick. Collection the pan aside.

Figure 2. Find the transmission liquid pan under your Jeep and also remove the 6 8mm mounting bolts.

Step 3 – remove the inner ATF filter cartridge

Once the pan is removed, you"ll check out the level internal automatically transmission fluid cartridge. This is the very first filter to replace. It is organized in ar by a solitary T25 Torx bit. Remove this bit, and also twist the cartridge back and forth while pulling under to eliminate it. There will be fluid inside, therefore prepare for it to to water out into your capture basin. You will notification on the nozzle the pops the end there is a plastic fitting. Eliminate this fitting, together you will need to re-use it. It seats up into the transmission fluid port from wherein you pulled the nozzle out.

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

Step 4 – eliminate the transmission fluid filter

This filter could be a real bear come remove. It looks choose a traditional oil filter and it"s best to use a distinct wrench designed because that this filter. Mopar filter wrench 8321 will make this task lot easier. Again, this filter will have plenty of liquid inside, for this reason take care when removing.

Figure 5. Remove this second ATF filter through the suitable wrench to make it much easier.

Step 5 – examine condition the your used transmission fluid

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

Figure 6. Usage this chart to recognize the condition of her transmission.

Step 6 – Clean increase gasket residue on pan mounting plates

Around the edge of both the liquid pan and under the engine girlfriend will find a chaos of old gasket residue. Both surfaces have to be cleaned well in stimulate to acquire a an excellent seal and also prevent any leaks. Use a plastic putty knife rather than metal to stop 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 thoroughly clean all the old gasket reside from this pan, and also where that mounts under the engine.

Step 7 – replace both filters

Replace the an additional filter first. Make sure that it is about 1/2 come 3/4 of a turn previous snug. As soon as replacing the major filter cartridge, you MUST very first seat the O-ring into the port. Carry out not effort to re-install both together one unit, or you can damages your transmission. Seat the O-ring in place and then tap into place v the handle finish of a screwdriver and a tiny hammer. Make sure it is seated do the washing up in the port. When you have actually that in place, re-install the primary filter cartridge and also replace the T25 bit. You execute not should torque this bit, however make sure it is tightened securely.

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

Step 8 – replace the transmission fluid pan

After you have actually cleaned the old gasket residue and also replaced the pan gasket, or used RTV sealant, you deserve to re-mount it to the engine. If you room using a new gasket, insert a couple of of the bolts into the pan first to make sure of accurate placement the the gasket. If you are using RTV, you will need to wait the specified curing time top top the tube before running your engine. The six 8mm bolts will must be torqued come 105 lbs/inch once reinstalling the liquid pan.

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

Step 9 – Add brand-new ATF +4

Once the pan has actually been torqued come specification, you have the right to add brand-new ATF +4 fluid. Be certain not to overfill. It should take around 5 quarts, however maybe a small more, just be sure to continually examine the level after ~ you have actually used about the very first 5 quarts. Let it collection for a if and shift through the gears without beginning the engine. This will certainly make sure that the liquid has gone through and worked out in place. Re-check the fluid levels and also add more as needed. Be certain to wait the stated curing time if you offered RTV before beginning the engine and take it for a check spin.

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Figure 10. Change through gears after adding the ATF +4 come make certain it gets operated in well.