My Lincoln Aviator started making a horrible noise in the rear of the vehicle on the morning of September 4, 2011. My wife took the Aviator to the aaa car care center to find and repair the issue. The aaa certified technician placed the Aviator on the lift and discovered the entire differential unit was hanging freely and literally swinging under the vehicle. After further inspection, the welding that holds the mount to which the differential until is bolted, broke from the frame. This issue of a differential mount weld breaking free has never been seen by the aaa certified technician or the aaa service manager with over 30 years of experience. Furthermore, the mount was only welded on one side (side closest to the rear of the vehicle). I visited the local Lincoln dealership and explained the issue with my Aviator?S differential mount only being welded on one side and asked to see an Aviator or Explorer that would have the same differential mounting system. This Lincoln dealership had an Explorer up on the lift and showed me that the differential mount on all Aviators and Explorer do indeed have the differential mount welded on both sides to the frame. The potential damage from the differential unit falling off the vehicle and the drive shaft becoming dislodged is exceedingly high and could pose a fatal scenario. I am asking for Lincoln to investigate this potentially fatal error of only having one weld seam holding the differential unit mount to the frame and inspect for any further damages as a result, in addition to inspecting for other areas of faulty craftsmanship. This manufacturing defect is in no way the error of the consumer or driving behavior. This issue points directly to the craftsmanship and integrity of the weld and quality control of Lincoln.

- Simpsonville, SC, USA

Vehicle shut off suddenly after a beeping sound and a low oil pressure light and battery light came on. This happened three times the same day and after seen this incident reported by other customers, quite dangerous considering that one could be hit by a vehicle driving behind if the driver is not keep safe distance and can stop. The steering becomes stiff and the brakes and accelerator pedals get locked into place. The vehicle is able to be restarted but the occurrence is quite dangerous and puts ones life at risk.

- Bellaire, TX, USA

Engine began idling roughly, and eventually the engine warning light came on. The problem was diagnosed as a crack in the cylinder head for number 8 cylinder. Talking to Lincoln mechanics and checking various discussion groups on the web showed that a large number of other Lincoln Aviators, and other vehicles with the same engine were experiencing this same failure. The rough idle can be alleviated by increasing the idle speed or taking the car out of gear while idling. Both of these actions are dangerous and can lead to accidents.

- Austin, TX, USA

My 2004 Lincoln Aviator engine has a burnt valve with less than 90K miles on it. Rich morton Lincoln dealership in glen burnie, md says my repair will be $5,400 if I want to fix it, which they do not recommend. I see online that many others have the very same problem with this vehicle. I have also had to tow in my car as several times the gearshift stuck in park and could not be shifted to drive. I spoke with other owners who had the same problem. Also, my tailgate window randomly flies up while driving, just like other owners have reported. My main issue is that my vehicle, an expensive one, is now not drivable and needs the $5,400 repair because of a defect in manufacture that Ford will not acknowledge. Help, please.

- Pasadena, MD, USA

When I turn on my 2004 Lincoln Aviator to warm up in the morning the smell of the gas is so strong. When I am at a red light or stop sign the car shakes so much that I have to put it the car in neutral to avoid the car from turning off. When I am driving the car jerks and stalls I feel scared when driving on the freeway because my car sometimes doesn't go as fast as the other cars because it stalls. The car drives rough and makes a whining noise all the time. Everytime I turn on the ac it makes a loud popping sound. I have not had my vehicle fixed or looked at due to my financial circumstance. My vehicle does not have warranty. I fear for the safety of me, my family and the public when I drive this vehicle.

- Anaheim, CA, USA

The contact owns a 2004 Lincoln Aviator. The contact was driving approximately 30 mph, approaching a complete stop. While the brakes were engaged the vehicle accelerated toward the oncoming traffic. The brakes were applied repeatedly allowing the vehicle to come to a complete stop. The contact was able to continue normal operation. The failure occurred on three different occasions. The vehicle was taken to an authorized dealer on three separate occasions for the identical failure and the technician was unable to duplicate the failure. Also, the vehicle was taken to an independent mechanic on two different occasions for the acceleration failure which there was no resolutions. In addition, there were intermittent failures with the engine misfiring and revving without warning. Also, the engine stalled when at a complete stop on numerous occasions; and a loud clunking noise would occur during the activation of the air conditioner. Recently, the anti-lock brake system warning light illuminated intermittently. The total repairs on the vehicle consisted of the cylinoid joints replacement; and an update of the computerized system software. The technician informed the contact that the transmission was defective. There had been no additional repairs performed on the vehicle at the time of the complaint. The failure mileage was 8,000.

- Apopka, FL, USA

This is the 3rd time that my 2004 Lincoln Aviator has shut down while driving it... with kids in the car. No steering, no breaks, and 60 mph down the highway. This car is sure to be the death of me... I have been lucky 3 times now, but what about the next time"?" voluntary service recall... manufacturing defect of the coil packs... issued by epa.gov (found after digging), replacement of the coil packs are covered until 120,000 miles. Ford will only replace one at a time, not all of them, so each time one is replaced.. I still have the risk of another going bad. Had four replaced so far, another tomorrow. I cannot believe that Ford can get away with this knowing that they are putting people's lives in danger. A car completely shutting down while driving at 60mph because of a defect during the manufacturing process doesn't cause concern for a recall... but a car speeding out of control does" what happens when I am on the interstate next time during rush hour and I have no steering or brakes???"

- Milltown, IN, USA

The back hatch panel cracked was fixed, the steering not right some times its hard to steer. Main problem is cylinder coils going bad alot. Now #8 coil went bad and has been replaced 2times, and its still in the shop they cant find out why it keeps coming up #8 still misfiring.. they think its the head now. I understand Lincoln has had so many problems with this that they have allowed a 10yr. Extended warranty on all the coils. Is this right ? I want Lincoln to do something. I am so mad right now. I will never buy another Lincoln. Help me.

- Wilmington, OH, USA

2004 Lincoln Aviator with engine problems. Consumer states that the dealer stated that the car would be repaired but at her expense because of her neglect. Mechanic determined that there was no oil in the vehicle. There was also a noise coming from the steering column when making a turn.

- Corona, NY, USA

Engine misfire due to cylinder leakage. Ford recommends replace cylinder head with tsb 06-5-13 for 2003-2004 mustang, 1999-2004 Navigator, 2003-2003 blackwood, 2003-2005 Aviator, 2003-2004 marauder. Cylinder head replacement will be made if car is still under warranty

- Dover, MA, USA