what causes the seatbelts to lock up? - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 01-02-2005, 12:33 AM   #1
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Default what causes the seatbelts to lock up?

what makes my seatbelts lock up? im just curious like if i take a corner fast and get some G'* goin it wil lock, or while the tires are spinning it locks sometimes...i could understand it locking under heavy braking...but i have no traction control, so what makes it sense trouble? just wondering.
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Old 01-02-2005, 12:57 AM   #2
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I believe that there is some kind of spring and gear assembly in there that is sensitive to directional force. If i pull hard on the belts they lock with the car off

I would like to know the whole locking mechanism, and how it knows when to lock and not when to lock. Anyone know for sure?
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Old 01-02-2005, 02:10 AM   #3
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When you pull the belt all the way forward, then release it, a grinding noise of some sort starts to happen, then try to pull it forward again, the belt is locked up. So maybe a type of tension locker gizmo thingy?
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Old 01-02-2005, 02:40 AM   #4
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I don't know...

But they do!
http://auto.howstuffworks.com/seatbelt3.htm
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Old 01-02-2005, 02:42 AM   #5
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Quote:
Originally Posted by Custom88
I don't know...

But they do!
http://auto.howstuffworks.com/seatbelt3.htm
There like the professor of the net
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Old 01-02-2005, 11:20 AM   #6
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I love that howstuffworks website. Everything you ever wanted to know... but were afraid to ask.
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Old 01-02-2005, 01:29 PM   #7
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All my belts function based on the car'* movement (exception centre-rear, of course)...
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Old 01-02-2005, 06:39 PM   #8
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the way i found out how it worked was the way most of us do things take it apart and then try to put it back together and then pray that it still works right!!!!
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Old 01-02-2005, 06:41 PM   #9
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I actually took the selt belts out from a junkyard car.....

It works by a tilt mechanism, that when the car lurches forward or back, comes into contact with a set of gears that control the belt coming in/out.

I've got one taken apart here @ my feet if anyone needs photos.
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Old 01-02-2005, 09:19 PM   #10
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Mine are actuated by excessive pull. I can reproduce the locking, by jerking the seat belt. They never lock when going around the corner too fast, like in other cars.


-justin
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