Question about 1999 Mercury Grand Marquis

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Grinding noise from rear of 1999 Grand Marquis

Car has about 80,000 miles and have noticed a "grinding" kind of noise from the rear of the car. This happens at low speeds when I am turning. It has been suggested that it is a problem with the differential, possibly ring and pinion gears, or bearings. I've been told it could cost up to $1,500 to fix the problem. Does any of this sound correct?

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  • RCL 42 May 11, 2010

    does it have rear drum or disc

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  • Mercury Master
  • 49,317 Answers

Doubt it very much
the only gears in action are the axle spider ( spur gears ) and they turn very slowly on turns
pinion and crown wheel, noise are growls and whines depending if accelerating or costing and makes no difference if turning or straight ahead That should save you $ $1500.00 for a diff center that costs only $450.00
indicates wheel bearings or brake pads ( linings ) worn out and the callipers rubbing on the rotor ( drum)
I would be checking at the wheels and wheel bearings for the problem

Posted on Oct 11, 2017

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Posted on Jan 02, 2017

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leetamara
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SOURCE: rear wheel bearings

First check the brakes on that side. You may be hearing the warning rivets on the brake lining. If it's good, You need to remove the axle and go to the machine shop and have a new bearing pressed on. The machine shop should only charge you about $20.00 to do this.

Posted on Jun 11, 2008

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SOURCE: 1993 Mercury Grand Marquis

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SOURCE: 1999 Mercury Grand Marquis

Check the U joints.Check the gear oil in the rear axle.Check the exhaust,make sure not rattling or rubbing anything.

Posted on Jul 08, 2008

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SOURCE: the alarm on my 1999 mecury grand marquis has gone off

Is It An Aftermarket Alarm You Will Have To Have It Removed To Remity The Problem The Relay's Go Bad In The Aftermarket Alarms.

Posted on Mar 04, 2009

chuck943
  • 783 Answers

SOURCE: I have a 2003 mercury marquis. Both rear hubs

If you have the caliper and retaining rings off the park brake must be holding it. This vehicle has small parking brake shoes that apply to the inside of rotor hat. Try backing off the adjustment and tap the sides of the hat to free them up.

Posted on Mar 22, 2009

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Although you need to reduce the overall speed, try turning your Overdrive button off and see if the noise goes away. The overdrive kicks in above 42MPH and if that is when your car starts to grind, its a good possibility for trouble.

Aside from that, the 3rd and 4th gear synchronizers or gears could be going. You could pull off the trans pan and see how much metal is in the pan.

You won't be going much longer if it is making this noise. Also try car-parts.com for Salvaged parts. It has an instant request feature and gives pricing, location, warranty, and contact info for all types of parts.

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1999 Mercury Grand Marquis


Check the U joints.Check the gear oil in the rear axle.Check the exhaust,make sure not rattling or rubbing anything.

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First check the brakes on that side. You may be hearing the warning rivets on the brake lining. If it's good, You need to remove the axle and go to the machine shop and have a new bearing pressed on. The machine shop should only charge you about $20.00 to do this.

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