1997 grand Cherokee Laredo revs at 3000 rpm in park and neutral But is perfectly fine in reverse and drive

SOURCE: Transmission -1997 Grand Cherokee laredo 4x4

Sounds like the lockup torque converter has failed. Repair requires trans removal and possible rebuild if converter has contaminated unit. Have a trans shop verify!!

SOURCE: 2002 jeep grand cherokee auto trasn is not changing gears

Personally, I'd drop the trans pan and give a look...but, best advice I can give you is to get to a REPUTABLE trans shop ASAP and not drive it unless its an emergency 'till then (more you drive, more damage you will do) The way a transmission is assembled, makes just about anything impossible without teardown.
And yes...only one filter in there.

SOURCE: Same as a lot of folks. 1995 Pathfinder. Without

if it is the automatic transmission and the other gears work but it wont drive in reverse. then I suspect the transmission fluid is too low.
are you checking the fluid correctly?
my sister had a car that reverse went out on. my dad asked her, how long has it been doing this?
she said 6 months and that she had to always park in a position that she wouldnt need reverse.
my dad asked how is the fluid? my sister said its always full on the dip stick.
she showed my dad it was full.
she didnt check the level correctly..
she checked the fluid when the car was cold. she checked the fluid when the car had been sitting for quite sometime and when it was not running.
.
run the engine till the transmission is warm. shift the car in all the gears. leave the car running in park on level ground and check the fluid then.

SOURCE: engine will not rev above 3000 rpm

Inadequate fuel pressure, change the fuel filter first, make sure the car sits for at least two hours before replacing the fuel filter because these fuel lines are under high pressure during the time of operation. The pressure usually decreases over time in the lines but wear safety glasses just the same, I would recomend depressurizing the fuel system first, buy a Haynes repair manual for detailed procedure to be safe. If problem persists go to Auto Zone and ask them to check for trouble codes these codes if present may instuct you in detail to replace the MAF sensor or give you a code that must be looked up to find the problem.

SOURCE: I have a 2005 Jeep Grand Cherokee Laredo 3.7l v6.

I got the same problem.. Where do we find the ESM??