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Parking brake failed

evowner

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Dang . . THAT is scary!
That truck is sliding on ice. That happened to me once. I came home on an icy night parked the truck on the street which is on a slight grade. Next morning I went out and the truck had slid out into the center of the street. My neighbor accused me of having had too much to drink.
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Heliian

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It is possible the parking pawl is broken and you weren't putting the brake on.

parked my son’s truck in the usual spot
came into the garage and guided me to park again
Are you parking on an icy hill still?

It will take all of less than 5 minutes to test your truck parking systems.
 

TMND

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Happened in his garage as well 🤷‍♂️

I’m assuming that floor was fairly level and dry
 

Firn

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Happened in his garage as well 🤷‍♂️

I’m assuming that floor was fairly level and dry
To be fair, the language used does not explicitly state that the truck was placed in the garage, just that OPs son went into the garage to guide them. They also state that the guiding was to put the truck into a spot clear of snow. If parking in the garage one wouldn't need help finding a spot clear of snow.
 

TMND

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🤦‍♂️You are correct sir. I had to reread the original post. I could’ve swore i read him say something about being pinned against the wall in the garage. Now that has me wondering if he was reversing into the parking spot like the video of the other guy sliding down the hill?? may be having your “anchor” tires on the downhill side would be better. Due to lack of reply from the OP we may never know.
 
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Firn

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I have had 2 incidents where the e-brake did not prevent the vehicle from sliding down my driveway.

The first (last winter) caught me completely by surprise as I was about 15 feet away from the truck and away it went. Fortunately, it turned sideways and stopped itself before it could get stopped by trees.

The second occurred early this winter while I stopped (in park) to open the garage door to my barn. I was aware of the snow on the driveway and made sure the parking brake kicked in before I exited the vehicle. Still, before I could even get halfway to the garage door, the truck started sliding. Since I'd left the driver door open and the truck running I was able to jump back in and apply the brake, hard. The truck stopped sliding once the physical brake was applied. I've since added an opener to that garage door so I won't have to worry about it again.

It appears that the e-brake isn't sufficient to hold the vehicle under some circumstances, which is concerning.
Did the truck slide, or roll?

Pushing the brake pedal would apply the brakes at all four wheels, the e-brake would only be two so it would be good to know if it slid or rolled since the e-brake is a solid mechanic brake, that and the parking awl should have engaged locking the rear drive motor
 

jefrank

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Did the truck slide, or roll?

Pushing the brake pedal would apply the brakes at all four wheels, the e-brake would only be two so it would be good to know if it slid or rolled since the e-brake is a solid mechanic brake, that and the parking awl should have engaged locking the rear drive motor
I can't be 100% sure if all 4 wheels slid or if 2 were turning - back 2 definitely slid based on the tracks in the snow on the drive. I just know that applying the physical brake stopped incident 2 immediately.
 

RocketGhost

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My guess is that nothing on the truck failed, the rear wheels were locked. The front wheel are not locked by being in park with the parking brake - only the rear wheels. The rear tires lost traction on the snow/ice and the truck slid with the rear wheels not turning. This has happened before.
 

jefrank

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My guess is that nothing on the truck failed, the rear wheels were locked. The front wheel are not locked by being in park with the parking brake - only the rear wheels. The rear tires lost traction on the snow/ice and the truck slid with the rear wheels not turning. This has happened before.
Seems like a questionable design to double-lock the back wheels (awl plus parking brake) with nothing locking the front, but, hey, I'm a software guy, not a mechanical engineer.
 

Firn

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Seems like a questionable design to double-lock the back wheels (awl plus parking brake) with nothing locking the front, but, hey, I'm a software guy, not a mechanical engineer.
The way most vehicles have done it. Well, at least before FWD being commonplace, but this is the way trucks have worked since, well, forever iirc.. The parking brake isn't an extra brake, it's a stronger system than the metal tab/pin that is the parking awl.
 

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jefrank

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The way most vehicles have done it. Well, at least before FWD being commonplace, but this is the way trucks have worked since, well, forever iirc.. The parking brake isn't an extra brake, it's a stronger system than the metal tab/pin that is the parking awl.
So it's tradition and we all know that tradition is never wrong :wink: :cool::ROFLMAO:
 

Runaway Tractor

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I don't understand the mental gymnastics people are subjecting themselves to here. Oh no the parking brake won't hold the truck on a solid sheet of ice!! No crap. The parking also will not let the truck swim, and also won't cook you breakfast. This is not a limitation or flaw in the vehicle. This is what happens on ice. To everyone and everything.
 

Joe.....Montana

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I don't understand the mental gymnastics people are subjecting themselves to here. Oh no the parking brake won't hold the truck on a solid sheet of ice!! No crap. The parking also will not let the truck swim, and also won't cook you breakfast. This is not a limitation or flaw in the vehicle. This is what happens on ice. To everyone and everything.
Are you sure.....

 

jefrank

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I don't understand the mental gymnastics people are subjecting themselves to here. Oh no the parking brake won't hold the truck on a solid sheet of ice!! No crap. The parking also will not let the truck swim, and also won't cook you breakfast. This is not a limitation or flaw in the vehicle. This is what happens on ice. To everyone and everything.
Wasn't a sheet of ice in my case, was just snow. Unfortunately, the snow was wet enough to compact down but thick enough not to get me to pavement.
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