If it's the 4.0L six cylinder maybe the harmonic balancer is coming apart.

JoBo

"tbills" <tbills1980@yahoo.com> wrote in message
news:1141778188.484511.304320@j52g2000cwj.googlegr oups.com...
>i have a '98 jeep grand cherokee laredo that started making a grinding
> sound when the car is started and then continues once in drive up until
> around 30mph or so and then quiets down. It seems to be in the front
> from what i can tell. Mysteriously, this was not a problem at all 3
> hours ago. Can someone please help. One thing to keep in mind is that
> the car has been parked for 10 days while i was on R+R. I hope that
> someone out there can help.
>
> Tony
>

 

Check all your fluid levels including transmission. If there are air
bubbles in hydraulic fluid, this will make the host hellish sound you have
ever heard. I guess you might call it "grinding".

Earle

"tbills" <tbills1980@yahoo.com> wrote in message
news:1141779335.103366.41520@u72g2000cwu.googlegro ups.com...
> Thanks alot. One question. If the power steering fluid is low does
> that really cause such a terrible grinding sound? It sounds and feels
> like grinding that i can feel vibrations. Thanks for everything.
>
> Tony
>

 

Check all your fluid levels including transmission. If there are air
bubbles in hydraulic fluid, this will make the host hellish sound you have
ever heard. I guess you might call it "grinding".

Earle

"tbills" <tbills1980@yahoo.com> wrote in message
news:1141779335.103366.41520@u72g2000cwu.googlegro ups.com...
> Thanks alot. One question. If the power steering fluid is low does
> that really cause such a terrible grinding sound? It sounds and feels
> like grinding that i can feel vibrations. Thanks for everything.
>
> Tony
>

 

Check all your fluid levels including transmission. If there are air
bubbles in hydraulic fluid, this will make the host hellish sound you have
ever heard. I guess you might call it "grinding".

Earle

"tbills" <tbills1980@yahoo.com> wrote in message
news:1141779335.103366.41520@u72g2000cwu.googlegro ups.com...
> Thanks alot. One question. If the power steering fluid is low does
> that really cause such a terrible grinding sound? It sounds and feels
> like grinding that i can feel vibrations. Thanks for everything.
>
> Tony
>

 

Check all your fluid levels including transmission. If there are air
bubbles in hydraulic fluid, this will make the host hellish sound you have
ever heard. I guess you might call it "grinding".

Earle

"tbills" <tbills1980@yahoo.com> wrote in message
news:1141779335.103366.41520@u72g2000cwu.googlegro ups.com...
> Thanks alot. One question. If the power steering fluid is low does
> that really cause such a terrible grinding sound? It sounds and feels
> like grinding that i can feel vibrations. Thanks for everything.
>
> Tony
>

 

I would be carefully putting my hand on the alternator to see if it is
getting smoking hot and I would check the PS fluid. The waterpump can
fail, but if it is grinding you should be able to wiggle the pulley when
it's off.

The bottom crank pulley can fail and start walking into the timing
cover.

I would eyeball the belt from the side to see if everything seems lined
up.

Good luck!

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Canadian Off Road Trips Photos: Non members can still view!
Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
(More Off Road album links at bottom of the view page)

tbills wrote:
>
> i have a '98 jeep grand cherokee laredo that started making a grinding
> sound when the car is started and then continues once in drive up until
> around 30mph or so and then quiets down. It seems to be in the front
> from what i can tell. Mysteriously, this was not a problem at all 3
> hours ago. Can someone please help. One thing to keep in mind is that
> the car has been parked for 10 days while i was on R+R. I hope that
> someone out there can help.
>
> Tony

 

I would be carefully putting my hand on the alternator to see if it is
getting smoking hot and I would check the PS fluid. The waterpump can
fail, but if it is grinding you should be able to wiggle the pulley when
it's off.

The bottom crank pulley can fail and start walking into the timing
cover.

I would eyeball the belt from the side to see if everything seems lined
up.

Good luck!

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Canadian Off Road Trips Photos: Non members can still view!
Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
(More Off Road album links at bottom of the view page)

tbills wrote:
>
> i have a '98 jeep grand cherokee laredo that started making a grinding
> sound when the car is started and then continues once in drive up until
> around 30mph or so and then quiets down. It seems to be in the front
> from what i can tell. Mysteriously, this was not a problem at all 3
> hours ago. Can someone please help. One thing to keep in mind is that
> the car has been parked for 10 days while i was on R+R. I hope that
> someone out there can help.
>
> Tony

 

I would be carefully putting my hand on the alternator to see if it is
getting smoking hot and I would check the PS fluid. The waterpump can
fail, but if it is grinding you should be able to wiggle the pulley when
it's off.

The bottom crank pulley can fail and start walking into the timing
cover.

I would eyeball the belt from the side to see if everything seems lined
up.

Good luck!

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Canadian Off Road Trips Photos: Non members can still view!
Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
(More Off Road album links at bottom of the view page)

tbills wrote:
>
> i have a '98 jeep grand cherokee laredo that started making a grinding
> sound when the car is started and then continues once in drive up until
> around 30mph or so and then quiets down. It seems to be in the front
> from what i can tell. Mysteriously, this was not a problem at all 3
> hours ago. Can someone please help. One thing to keep in mind is that
> the car has been parked for 10 days while i was on R+R. I hope that
> someone out there can help.
>
> Tony

 

I would be carefully putting my hand on the alternator to see if it is
getting smoking hot and I would check the PS fluid. The waterpump can
fail, but if it is grinding you should be able to wiggle the pulley when
it's off.

The bottom crank pulley can fail and start walking into the timing
cover.

I would eyeball the belt from the side to see if everything seems lined
up.

Good luck!

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Canadian Off Road Trips Photos: Non members can still view!
Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
(More Off Road album links at bottom of the view page)

tbills wrote:
>
> i have a '98 jeep grand cherokee laredo that started making a grinding
> sound when the car is started and then continues once in drive up until
> around 30mph or so and then quiets down. It seems to be in the front
> from what i can tell. Mysteriously, this was not a problem at all 3
> hours ago. Can someone please help. One thing to keep in mind is that
> the car has been parked for 10 days while i was on R+R. I hope that
> someone out there can help.
>
> Tony

 

ok, here is an update. i found that my power steering fluid was low.
i filled it up last night and then checked it around 6pm today. IT WAS
EMPTY. I noticed that it was just going in and out vias a leak. The
fluid leaked and got all over the belt and other things under the hood.
Would the sound being made be caused by the steering fluid getting on
the belt and not allowing it to turn properly. Any suggestion is good.
What should i do to replce the steering fluid container.

Thanks