In Grand Chrokees, there are various rear ends that require different fluids. You'll need to take your VIN number and call the parts department of your local Jeep dealer. Ask them. Don't guess. You might cause damage.
You add the fluid down the dipstick tube.
No, the rear fluid comes out of the front reservoir.
If the fluid leaking into the rear tire is not brake fluid then it comes from the differential. It means you have a leaking seal. It means you are losing differential fluid. When the fluid is gone or gets low, you will lose your differential, the gears will strip, you will hear a horrible grinding sound, the rear wheels will lock up, and you will be stuck with the vehicle stopped wherever you are. Hopefully, it will not be in the middle of an Interstate highway with traffic screaming past at 80 miles an hour.
At 18000 miles if towing
Differential oil will work fine dude or even gear box oil.dude
Remove the plug in the center of the cover. Fluid level should be even with the bottom of the hole.
In the differential
You add the fluid down the dipstick tube.
Mopar ATF
+4 ATF (+3 is compatible)
No, use ATF only.
No, the rear fluid comes out of the front reservoir.
parking break is on or low break fluid
If the fluid leaking into the rear tire is not brake fluid then it comes from the differential. It means you have a leaking seal. It means you are losing differential fluid. When the fluid is gone or gets low, you will lose your differential, the gears will strip, you will hear a horrible grinding sound, the rear wheels will lock up, and you will be stuck with the vehicle stopped wherever you are. Hopefully, it will not be in the middle of an Interstate highway with traffic screaming past at 80 miles an hour.
At 18000 miles if towing
Mopar ATF+4
Not sure about 1999 but on 1998, pumps and windshield fluid bottle are one assembly. Take out the windshield fluid bottle, you'll find two pumps at the bottom.