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4X4 not working all the time

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Old Dec 24, 2004 | 08:31 PM
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4X4 not working all the time

I have an 81 Bronco with automatic tranny and manual shift 4X4 and manual lockouts. Sometimes when I go thru deep snow it works great and other times the front wheels don't seem to pull at all. I got stuck a while ago in some snow that was not very deep and the front drivers side wheel that I could see was not turning most of the time and I don't think the the pass side was either cause when they are turning I can see snow flying up from them. Then all of a sudden she pulls out of the snow. Are both front wheels supposed to pull when it is in 4 L or 4 H ? It was just acting like a 2 wheel drive. This happened to me the other morning and same deal it just suddenly decided to really kick in. It didn't seem any different in 4 H or 4 L. Any help would be appreciated, it was an embarrasment to be stuck twice in such little snow with a 4X4.
 
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Old Dec 25, 2004 | 06:19 PM
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aurgathor
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Strange.... Normally, it's the automatic hubs that don't work. Were your hubs in the locked position? If the front is not a locker or limited slip, it's entirely possible for one end to spin.
 
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Old Dec 25, 2004 | 08:43 PM
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tex94F250
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Never had a moments problem with my automatic hubs and limited slip front/rear diffs. Snow is a funny animal and a lot of the time, at least around here, has ice under it. Nothing holds ice except the zamboni. Sometimes you cannot see or feel rotation until it digs through and grasps terrain, hence the hesitaiton.
Tex
 
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Old Dec 25, 2004 | 08:44 PM
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Originally Posted by aurgathor
Strange.... Normally, it's the automatic hubs that don't work. Were your hubs in the locked position? If the front is not a locker or limited slip, it's entirely possible for one end to spin.
I made sure the hubs were locked in. I am starting to think that the front and rear ends are open and not lockers. It seems that I have only gotten stuck from a slow move or dead stop. If I have some momentum built up I don't notice it much. How do I tell for sure if they are limited slip or open?
 
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Old Dec 25, 2004 | 09:02 PM
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From: N. Gwinnett Co. Georgia
A limited slip differential will turn the slipping wheel about 1 1/2 turns or so then lock up and both will pull. On my '94 F250 I have front/rear limited slip. Once the slipping wheel slips the required amount everything pulls. Absolutely hard to stop and I guarantee the you will know everything is pulling. Goes through about anything I've thrown at her.
Tex
 
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Old Dec 27, 2004 | 02:52 AM
  #6  
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aurgathor
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From: Lynnwood, WA
Originally Posted by tex94F250
Never had a moments problem with my automatic hubs
Not sure about F250 auto hubs, but quite a few people had problems with auto hubs on the Bronco. Sure, they are very convenient, but I'd take reliability over convenience any day, especially since I had found it out in the hard way -- in 6" snow on a steep hill.... One side had 2 broken "teeth", the other just wasn't working for some unknown reason.
 

Last edited by aurgathor; Dec 27, 2004 at 03:01 AM.
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Old Dec 27, 2004 | 02:57 AM
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aurgathor
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From: Lynnwood, WA
There should be a tag on the differentials -- post what's in there. If you have two open differentials, definitely install either an LS rear, or a locker on the rear.
 
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