Question about 1999 Jeep Grand Cherokee

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Weird noise in th e dash when I hit the brakes

I hear a flapping noise, same as if you were to put something soft in a fan blade when I hit the brakes hard. FRRRRRRRrrrrrrr.... 'till stop.

I also hear it when the Laredo hits a depression on a country road. The colder (engine and weather), the louder !

It seems like it is whenever the truck is leaning forward. No, it is not the ABS...

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  • monchalet Feb 02, 2009

    It is definitively a noise coming from inside the vehicule.

  • monchalet Feb 05, 2009

    Found it!!! When I hit the brakes the front of the car would dip then a hanging loose geer selection cable was touching the driving shaft. This would make the FRRRrrrrrrr noise!

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ASE Mechanic:
have to crawl underneath and inspected all splash guards, brakes, axles. If front end dips it is rubbing against something.

Posted on Jan 27, 2009

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Fan making clanking noise like it is hitting something the part seems to be located in the lower left front passenger side


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Question. Is the flapping at a very fast pace that would indicate the speed of a fan blade hitting something? If so, you may be on to something there such as a misplaced gasket or something has dropped/fallen into the blower box via a vent.

If it is not that speed then see the following..

Hope I can give you some direction. Speaking from a generic sense all ac/heaters these days have a door or doors in the blower box that control air flow from the main part of the box to different positions when you ask for vent, heater, mix, defrost etc..

Most these days are operated with a small electric servo/motor and unfortunately the mostly have plastic gears that wear and can "thump-thump" as the motor cycles trying to open or close the flapper door.

Try to change the air direction from Max AC to regular ac to heater, defroster, bi-level etc all with the AC switch in the on position if you have a separate on/off switch.

Listen to the sound and see if it comes and goes with a different location of the selector switch.

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Lets start with that and see what happens. This is interesting.

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Whenever I go down the road at 35miles per hour you can hear a noise from the front driver side tire. Like a flapping noise? and you can also hear it near the steering wheel inside.


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Replace the blower motor


Couple of possibilities asn.
The blower motor may be worn out or something has jammed up the fan blade.
If it hasn't blown the fuse already it may have damaged the blower resistor.
The resistor depends on the airflow from the blower to keep it cool.
Pull the blower motor out, check the shaft and fan blade for looseness and debris. If there is debris in there make sure you get it all out from up inside the housing too.
The blower is fairly accessible and inexpensive on this model of car.
Under the right side of the dash there is a hush panel to remove. you will see the motor housing pointing down. Undo the connector to the motor, 3 or 4 screws retain the motor to the case. Lower it down.
Reverse to reinstall.
Any more questions please ask me.

KL

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