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Front axle binding when engaged?

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Old Feb 5, 2005 | 12:01 PM
  #16  
kingofdodge7131's Avatar
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Re: Re: No limited slip in RAM front AAM's.....

Originally posted by Wetspirit
There is no differential between the front and rear drivelines on our trucks so at least one of the wheels must slip. This is the binding and lurching we feel. And if your surprised it does it on slippery surfaces it's only because the surface has more traction than you thought.

Wetspirit
It is possible that the IFS on the chevy has a differential in there. Never owned a new enoujgh chevy to know. Only one ive owned was a scottsdale and it did it. All my dodges have done it, its all i know.
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Old Feb 5, 2005 | 12:12 PM
  #17  
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The feeling is more noticeable in a Dodge than a Chev because Dodge has u-joints in the front axles, as opposed to the CV joints found on a Chev. A CV joint can transmit power smoothly through an angle, while a u-joint actually speeds up and slows down through a 360 degree rotation of a shaft when on an uneven plane. This becomes more pronounced the more sharp the angle is. Hence the feeling of binding.
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Old Feb 5, 2005 | 12:14 PM
  #18  
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Re: Re: Re: No limited slip in RAM front AAM's.....

iginally posted by kingofdodge7131 [/i]
It is possible that the IFS on the chevy has a differential in there. Never owned a new enoujgh chevy to know. Only one ive owned was a scottsdale and it did it. All my dodges have done it, its all i know. [/QUOTE]


All trucks have differentials in the front and rear axles, IFS or not. Only a few have differentials between the front and rear drivelines. Dodges don't. Some Jeeps do and anything labeled as "full time 4WD" does.

Wetspirit
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Old Feb 5, 2005 | 02:02 PM
  #19  
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Originally posted by torquefan
The feeling is more noticeable in a Dodge than a Chev because Dodge has u-joints in the front axles, as opposed to the CV joints found on a Chev. A CV joint can transmit power smoothly through an angle, while a u-joint actually speeds up and slows down through a 360 degree rotation of a shaft when on an uneven plane. This becomes more pronounced the more sharp the angle is. Hence the feeling of binding.
I think torquefan just answered all our questions!!

Wetspirit, our work trucks are 2500 QC hemi's, so the whole Cummins front heavy thing would not apply.
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Old Feb 5, 2005 | 06:35 PM
  #20  
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Re: Re: No limited slip in RAM front AAM's.....

Originally posted by Wetspirit
It's not caused by the difference in speed of the two front wheels, it's caused by the difference in speed between the front and rear drivelines. While turning, the front of the truck goes around a larger circle than the rear of the truck. So the front wheels average speed must be slightly higher than the rear wheels average speed to complete the turn. There is no differential between the front and rear drivelines on our trucks so at least one of the wheels must slip. This is the binding and lurching we feel. And if your surprised it does it on slippery surfaces it's only because the surface has more traction than you thought.

Wetspirit
So, what you're saying is, if one were to make a clockwise lock-to-lock turn & complete a circle, the r/f tire will turn the exact number of revolutions as the l/f tire ?
Greg
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Old Feb 5, 2005 | 08:08 PM
  #21  
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Isn't it amazing how such an easy question, answered correctly twice in the first two responses turns into such a confusing abortion?
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Old Feb 5, 2005 | 10:43 PM
  #22  
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From: Smith Valley, NV (sometimes Redwood City, CA)
maynard,

No, that's not what I'm saying, of course they will turn a different number of times

The left and right tires do turn a different number of times on a circle, BUT, that is not what causes the jerking. It's the difference in speed between the front and rear drivelines that causes the jerking. The r/l wheel speed is allowed by the differentials but the driveline differences must be made up by wheel slip.

Wetspirit
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Old Feb 5, 2005 | 10:48 PM
  #23  
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From: Smith Valley, NV (sometimes Redwood City, CA)
Originally posted by bulabula
Isn't it amazing how such an easy question, answered correctly twice in the first two responses turns into such a confusing abortion?
Actually, it wasn't answered correctly in the first two responses. We don't have LS differentials in the front.

Wetspirit
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Old Feb 6, 2005 | 06:22 AM
  #24  
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Originally posted by Wetspirit
Actually, it wasn't answered correctly in the first two responses. We don't have LS differentials in the front.

Wetspirit
Hey Wet, the question was "Is this normal"? Referring to the binding - from the title of the thread. Yes it is normal.
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Old Feb 6, 2005 | 08:44 AM
  #25  
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It is a normal mechanical action, but it is damaging to the driveshaft/u-joints.
These trucks have " part-time 4X4 transfer cases" .
The output shafts are locked together when in 4X4, and the binding is because the rear shaft needs to turn less than the front when going around a corner.
Some vehicles us a full time t- case and some are called all wheel drive. These actually let the driveshafts turn at different speeds.
YOU ARE DOING DAMAGE to your truck if you are in 4X4 on dry or good traction surfaces.

Now take some time and read your owners manual.
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Old Feb 6, 2005 | 11:17 AM
  #26  
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I agree w/ J-Fox.....Don't drive on dry pavement or other high grip surfaces in 4WD or it can damage your truck....Our trucks are PT 4WD and lack the center diff than an AWD vehicle would have...
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Old Feb 6, 2005 | 11:28 AM
  #27  
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From: Smith Valley, NV (sometimes Redwood City, CA)
Originally posted by bulabula
Isn't it amazing how such an easy question, answered correctly twice in the first two responses turns into such a confusing abortion?
Yeah. Oh well. That's what makes it fun.

Wet
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