1994 Jeep Grand Cherokee Laredo 5.2 V8. Loud whurring noise coming from top left of engine. I can see the part that is vibrating. I have a pretty specific picture if you'd like.

the sensor assembly has to be set just right to be in time with motor

I do it all the time. the reason that happens is snow packs in the rims and tires and causes the tires to be out of balance so at speed they will vibrate and make a louder road noise. solution bring it to the car wash and spray those tires down.

For the 1998 Jeep Grand Cherokee Laredo:
I do not know if you have the 4.0L In-Line 6-Cylinder, the 5.2L V8, or the 5.9L V8; however I have included ALL below:

For the 4.0L In-Line 6-Cylinder:
Firing Order:
1-5-3-6-2-4
Cylinders:
(back)
...6
...5
...4
...3
...2
...1
(front)

Distributor:
....(back)
.....5....3..(+)-screw
1.............6
(+).4....2

For the 5.2L V8: AND 5.9L V8:
Firing Order:
1-8-4-3-6-5-7-2
Cylinders:
.......(back).......
|..8..|.........|..7..|
|..6..|.........|..5..|
|..4..|.........|..3..|
|..2..|.........|..1..|
.......(front)
Distributor:
.....(back)
.......3
..4.........6
8.............5
..1.........7
.......2
......(front)

Let me know if this helped, or if you have additional information or questions. Feel Free to contact me at FixYa.com!

You didn't post your engine size so please choose the apprpriate diagram:





1989-98 2.5L Engine firing order: 1-3-4-2 Distributor rotation: Clockwise






2.8L Engine firing order: 1-2-3-4-5-6 Distributor rotation: Clockwise





4.0L Engine firing order: 1-5-3-6-2-4 Distributor rotation: Clockwise





5.2L and 5.9L Engine firing order: 1-8-4-3-6-5-7-2 Distributor rotation: Clockwise

THIS MODEL HAD NO V6 ENGINE, IT HAD A STRAIGHT 6 (4.0L) OR A 4 (2.5L) CYLINDER, THE GRAND CHEROKEE HAD A V8 (5.2L) AS AN OPTION AS WELL.

Have the wheel hub bearings checked.

Assuming the motor is an inline six
1.Middle bolt is number 1.Clockwise torque to 22 f/lb
2.Same pattern to 45 f/lb
3. same pattern to 100 f/lb
Be sure to use loctite 592 to the threads and some head gasket sealer to both sides of the head gasket.
Hope this helps

You can check fluid level by removing the rubber plug in the cover. Fluid is full when on level ground, it is just at the edge of the hole (or very close) if you are already getting noises out of there, you can remove the cover and inspect gears for wear or breakage. If you find a large amount of metal debris in the lube it tells you something bad is going on back there. Although rebuildable, it's not a home job...requires exact settings in order to operate properly. You can find good units far cheaper than even a gearset costs in any scrapyard. to match ratio, count the teeth on the ring gear and the pinion gear. the replacement MUST have the exact same number. Before swapping diffs, check all back there to make sure noise is not from somewhere else.

i would check out the u- joints first

I have a 1994 jeep laredo. When I make a u turn there's a loud sound while making the turn and the car starts skipping until I turn the wheel straight. What causes that?