On the differential there should be a plug with a 3/8 or 1/2 inch square on it that you can use a socket wrench to remove, just stick your finger in and feel if there is fluid. If there is no fluid, fill to that level.
Remove fill plug, should be level with bottom of hole.
The oil should be level with the plug in the center of the rear cover.
There is no such thing as a 2002 Cherokee Laredo. The last year for the Cherokee was 2001, and the last year it came with the Laredo trim was 1992. I have a 2003 Cherokee Laredo so this awnser makes no sense at all. Do you have a GRAND Cherokee Laredo? Those are still being made. They are not the same as the Cherokee.
NoNo
It can not be removed and have the engine still run.
No, you will need to remove the tank.
Purchase a Haynes manual from an auto parts store.
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There is no such thing as a 2002 Cherokee Laredo. The last year for the Cherokee was 2001, and the last year it came with the Laredo trim was 1992. I have a 2003 Cherokee Laredo so this awnser makes no sense at all. Do you have a GRAND Cherokee Laredo? Those are still being made. They are not the same as the Cherokee.
NoNo
You have a leak that needs repaired.
No, they are not interchangeable.
It can not be removed and have the engine still run.
It has a timing chain.
Yes, some will be.
No. They are not interchangeable.
The water pump is on the front center of the engine.
No, you will need to remove the tank.
Jeep does not use inertia/reset switches.