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  #13  
Old 12-11-2010, 03:23 PM
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Re: quadra trac ll question

I just finished openning up the front differential and reclosing it. I saw nothing wrong with the differential gears or ring/pinion. I took a close look at the front drive shaft and I found I have no U-joints only on the back drive shaft do I have them..... SO, what are those joints, CV's?. I see the front joint is telescoping.

When I twist the drive shaft back and fourth I can hear the gear teeth in the TC hit together as they have a little play in the mesh of the teeth, is that normal?

knowing my axle CV's are good, knowing the inside of my differential looks good. The next possiblity are the two joints on the front drive shaft. Again what kind of joint are they?

Also confirmed I have no hydra lock in the front.
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  #14  
Old 12-11-2010, 09:12 PM
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Re: quadra trac ll question

Its normal that there is some play in the drive train. When you turn the propeller shaft, you can hear this in the diff and T-case. Ofcourse when its excessive, its not ok.
For the front propeller shaft there are 2 options, or you have 2 U-joints in there, or 2 CV joints. You already mentioned that you don´t have the U-joints in there, so then you have the CV joints.
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Old 12-12-2010, 10:05 AM
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Re: quadra trac ll question

So CV uh... these joints don't look as if they come apart or do they? Anything I can do to confirm they are good or bad? Is replacing this drive shaft a big deal, but don't want to do this until I can comfirm they are bad.

With 162K on the Jeep, is that about it for this drive shaft?
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Old 12-12-2010, 02:49 PM
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Re: quadra trac ll question

I´m not an expert on this, but to be sure that the problem is the CV joint, i would remove the shaft and feel if there is any play on one or both joints. I think that the CV joint can be replaced separately, but not sure about this though. Jeep manual doesn´t mention anything about it. But being the fact that the front propeller shaft is only used under torque once in a while, it would be a surprise that one or both CV joints would be bad. The boots of both CV´s are intact?
If you decide to remove the propeller shaft, make a reference mark on the mating surfaces, to be sure you will put it back in the same position, for balancing purposes.
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  #17  
Old 12-12-2010, 07:42 PM
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Re: quadra trac ll question

I hear what you are saying and agree, this shaft doesn't see full time torque, so why should it be bad, but will have to remove it to take a look. Yes both boots look OK.

I had researched this problem on the WWW and I have found nobody that figured out what it is.
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Old 12-12-2010, 08:06 PM
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Re: quadra trac ll question

Did you already try to put the T-case in 4-Lo and see if you get the same popping sound. The best is to do this on an unpaved area. With the T-case in 4-Lo, the front shaft will be directly driven and you won´t need a lot of power to let the wheels slip for the front shaft being supplied with torque. You can experiment with low torque or higher torque to maybe find out more where the problem is, without taking half of the car apart.
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Old 12-13-2010, 10:06 AM
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Re: quadra trac ll question

Yes, I did try 4Lo and yes it made the same sound but even more clicking.

Anyhow I found this just this morning on the WWW

http://www.jpmagazine.com/featuredvehicles/154_0801_1999_2004_wj_jeep_grand_cherokee/photo_07.html

From this picture stands reason why the noise is located in the front of the vehicle.
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Old 12-13-2010, 03:58 PM
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Re: quadra trac ll question

Will you remove the shaft to check for play on the CV joints? Is the noise already too bad to replace the CV joints or complete shaft?
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Old 12-14-2010, 12:48 PM
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Re: quadra trac ll question

it looks as if the removal is simple. 8 bolt around the OD of the joint each side then it falls out. I am convinced it is this CV joint making the noise but I don't have time right now to remove it so will have to do it in a few weeks.

The noise is not bad as long as I'm not slipping the wheels with too much torque then no sound.
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Old 12-15-2010, 03:21 PM
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Re: quadra trac ll question

Hi, A simple way to check the front Drive/Prop shaft CV, Constant Velocity Joint, is to grab the shaft and see if you can Twist/Turn it back and forth, also see if there is any Lateral play, ie sideways movement, push and pull the shaft with a sideways action, On the front Hub CV joints, its a lot harder to test, but if you grab the CV by the boot and pull and push any play would be noticeable, One other thing, when you checked the Front Diff and you refilled the oil, did you put the Chrysler Additive in? Hope this helps.
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  #23  
Old 12-17-2010, 10:51 AM
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Re: quadra trac ll question

Isn't the additive only necessary if a Vari-lok is in there? The limited slip additive is needed for the clutch assembly to work properly.
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  #24  
Old 01-10-2011, 09:43 AM
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Re: quadra trac ll question

Ok, had a chance to replace the front drive shaft, and to my amazement It did NOT fix the clicking. It just must be the front axle CV's as this clicking is now progressed to the point it will click on the highway if the slightest torque is applied on dry pavement. I know it is coming from the front and I think, yes slightly think it may be more to the right side, this clicking noise.

So now, I have no other option other than throwing time and money at this problem, I had order a new front axel, and will just swap this out and see what happens, I’m sure if this axle CV is really the problem I will see it right away once I remove it.
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