Question about Ford Expedition

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Do both front tires lock when i put the vehicle in park?

We parked the vehicle on a gentle incline, it is icey, the vehicle is in park, it rolled back 1-2 feet, one front tire appeared to skid, while the other one rolled. Is this normal?

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  • Master
  • 673 Answers

Yes it is normal. nothing to worry.

Posted on Oct 29, 2012

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What may have happened is that one of the tire pressure sensors was damaged, or the system was not reset.
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Posted on Jan 16, 2009

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SOURCE: I have a 1999 e-450 that sometimes rolls when its in park.

Your linkage is out of adjustment or worn bushing. There is a series of links and rods that accomplish the changing of gears,(especially with a column shifter). The links sometimes have plastic or nylon bushings. They become worn or broken and allow for maladjustment--not going into gear or park fully.
If it isn't going into park and the linkage is correctly adjusted with no damage, you should suspect internal transmission damage.

If you don't feel comfortable about this repair, a respected shop is your best bet.

Posted on May 02, 2009

  • 6982 Answers

SOURCE: transmission hesitates & gets stuck.

You have two separate issues here. First, the delay going into gear may benefit from a fluid change providing that the cause isn't just low fluid level but not always. It will not help immediately, because likely there is a lazy shift valve caused by a small amount of varnish which may need some time to clean up. It may not help at all if the valve is sticking because of wear or other internal mechanical problem.
Your other problem is with going out of park. Actually, that is a normal condition that happens in every vehicle, but is more noticeable in heavier ones or those with slightly shorter shift arms on the transmission itself. Virtually every manufacturer uses the same method of locking a transmission in park. This is done by using a square piece of steel that fits into a square slot on the outside of an internal drum which is locked to the mainshaft of the transmission. Around that drum there are multiple slots as well as "blank" areas between them so that you can select park without having the vehicle need to roll a full revolution before the piece of steel (called the parking pall) can engage the drum. It does need to roll a bit till it finds a slot though. Putting the parking brake on takes tension from the drum and pall, so that the pall is not "loaded" by the weight of the vehicle, which makes it difficult to pull it back to disengage it. The weight of the vehicle and severity of the incline come into play here, as they add to the amount of loading. The length of the trans shift arm provides either more or less leverage, making movement either easier or more dificult...so there is a variable between vehicles for all of the different reasons above.
Every owners manual will contain instructions to use the parking brake on hills but don't explain why...now you know. Parking against a curb, you are loading the lock mechanism from the steering side which is why you should avoid parking like that.
Long answer to an easy question but that's how it works!!!

Posted on May 25, 2009

  • 50 Answers

SOURCE: my back wheels will not turn.. I parked the van

do you use parking brake? If so it sounds like it might be stuck. Try going in reverse and apply and let off e brake a few times.

Posted on Mar 30, 2010

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I just bought a 2010 buick enclave cxl and on slight incline in drive will roll back. ? Its like the rpms arent where they should be. I don't think the weight should pull it back so much. Thanks


The parking brake is the way to stop it rolling back. Idle RPM are set and have no bearing on how the car rolls back. apart from if you increase the revs, the car will move. The proper procedure on an incline is to apply the parking brake, put the vehicle into drive, increase the revs and take off the parking brake. Just like we did in the old days when we had manual gearboxes :>)

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The Vehicle wont go in park, and stay in park when turned off


You need to take that vehicle to a transmission shop or the dealership right away! If you continue to use the parking break it is going to cause unpredictable wear on it in the future or even now - that vehicle rolling on more than a 1% incline can kill a person. Take that vehicle in for service and make sure to block the tires EVERYTIME you park until you get that vehicle looked at and do not travel with children in this vehicle!

Jan 15, 2013 | 1998 Mercury Mountaineer

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On two occasions our '99 Volvo S80 locked in park. Gear shifting lever would not go into Drive. Both times it was parked on an incline. By pushing (rocking ) foreword several times the shifting le


Sounds like a part called a parking "Pawl" is hanging up. You could try to park the way they show you in driving school, with the rear of the tire against the curb when the car is facing uphill. Theory is that the tire will chock the vehicle against the curb as a bumper stop and prevent rolling backwards. This will minimize pressure on the inside of the transmission parking pawl.

You can go to aboutautomobile.com and search for "Consumer complaints" or Recalls and enter your vehicle info. Then see if others are having problems like yours.

Jan 25, 2012 | Volvo S80 Cars & Trucks

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1989 gmc 2500 hd keeps locking up when put in park have to rock the vehicle and it will shift out of park


The best way to help in this is set the ebrake everytime you stop before letting your foot off the brake. It sounds like the pawl in the transmission that sets when you put the vehicle in park to keep the internals in the transmission from moving, has excess pressure on it. Possibly due to parking on an incline. Make sure your rear brakes are adjusted up properly so when you set the ebrake it will keep the vehicle from rolling and putting excess pressure on the pawl. Good luck and let me know how it goes.

Jul 08, 2011 | 1989 GMC Sierra

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2002 Land Rover Discovery rolls when it is in PARK.


It is known as the Parking Pawl assembly, and requires removal of the gearbox from the vehicle along with the transfer box. You then remove the extension housing (requiring new bolts) and then replace the park lock gear and o'ring.

Sep 25, 2009 | 2002 Land Rover Discovery Series II

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Having trouble shifting from park to any gear, when I wait about 15 secs it may shift easily and other times I turn the wheel and it will shift


Do not shift into park and move the steering wheel to lock it. It will lock itself if the vehicle is moved or someone tries to steel it. Reason is that the lock pin hsas many holes to drop into and if you lock it when you have turning pressure on in it. You will lock it with pressure on the lock pin.
Second, always set your parking brake before, not after putting it in park. Never put your front tires against a curb and put it in park without letting the vehile roll away from the curb.. An don't hang you car on a slope by putting it in park. Parking brake always befor parking gear and hands off steering wheel when placing in park. Try it, you'll like it.. forcing your shifter to come out of park can cause damage to the shifting componants. Let me know how it works for you. - Ned_

Jul 08, 2009 | 1999 GMC Suburban

1 Answer

Transmission hesitates & gets stuck.


You have two separate issues here. First, the delay going into gear may benefit from a fluid change providing that the cause isn't just low fluid level but not always. It will not help immediately, because likely there is a lazy shift valve caused by a small amount of varnish which may need some time to clean up. It may not help at all if the valve is sticking because of wear or other internal mechanical problem.
Your other problem is with going out of park. Actually, that is a normal condition that happens in every vehicle, but is more noticeable in heavier ones or those with slightly shorter shift arms on the transmission itself. Virtually every manufacturer uses the same method of locking a transmission in park. This is done by using a square piece of steel that fits into a square slot on the outside of an internal drum which is locked to the mainshaft of the transmission. Around that drum there are multiple slots as well as "blank" areas between them so that you can select park without having the vehicle need to roll a full revolution before the piece of steel (called the parking pall) can engage the drum. It does need to roll a bit till it finds a slot though. Putting the parking brake on takes tension from the drum and pall, so that the pall is not "loaded" by the weight of the vehicle, which makes it difficult to pull it back to disengage it. The weight of the vehicle and severity of the incline come into play here, as they add to the amount of loading. The length of the trans shift arm provides either more or less leverage, making movement either easier or more dificult...so there is a variable between vehicles for all of the different reasons above.
Every owners manual will contain instructions to use the parking brake on hills but don't explain why...now you know. Parking against a curb, you are loading the lock mechanism from the steering side which is why you should avoid parking like that.
Long answer to an easy question but that's how it works!!!

May 25, 2009 | 2001 Jaguar S-Type

1 Answer

1991 Chevy Silverado Rolls while in Park


Hi, This looks like the Pawl in the gearbox has been broken/damaged or even left out when the box was overhauled.
It lock the gearbox whilst in park so acting like a brake.
It could have occurred if someone put the vehicle in park whilst still moving.
Hope this helps?
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Thank You!
Paul 'W' U.K.

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