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ZJ and WJ Grand Cherokees (1993 - 2004) Technical forum for the classic ZJ and WJ Grand Cherokees.

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  #1  
Old January 13th, 2018, 21:15
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ZJ coil spring question

I got in our 1998 Grand ZJ and noticed something was wrong. The rear passenger coil had almost completely collapsed with maybe a .25 inch of down travel left in the shock. The entire rear looks like it's sagging pretty bad now. The ZJ only has 167,000 miles on it. This thing is a DD so I'm surprised that it fatigued at such low (to me) mileage. Anyone ever had this happen?
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Old January 14th, 2018, 08:35
trippled trippled is offline
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Re: ZJ coil spring question

Did the spring break? Never seen something like that. Post any pics? Interested in what it looks like.
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Old January 14th, 2018, 12:59
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ZJ coil spring question

Messed up pic.
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Last edited by PacificEd; January 14th, 2018 at 13:18.
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Old January 14th, 2018, 13:05
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ZJ coil spring question

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Here is the passenger rear spring.




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Old January 14th, 2018, 16:22
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Re: ZJ coil spring question

This sounds nuts but this morning it was still sagging. I went outside at 2:30 pm to tinker with it and it’s back up at ride height. What the.......? I took it for a drive and it was fine. I’m thinking the shocks were frozen? Is that possible? The shocks are of unknown age and are mounted piston up which I’m guessing has allowed moisture in.
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Old January 15th, 2018, 21:30
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Re: ZJ coil spring question

Since the shocks were of questionable age and brand, I pulled the trigger and ordered a set of Bilstein 5100 shocks for the ZJ. My future plans are to go to OME HD 2.5" lift coils down the road, so the shocks are ordered to work with the future coils. The Jeep currently has a 2" BB lift puck in there now so everything should be good until the future mods begin.
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Old January 16th, 2018, 20:27
trippled trippled is offline
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Re: ZJ coil spring question

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Originally Posted by PacificEd View Post
This sounds nuts but this morning it was still sagging. I went outside at 2:30 pm to tinker with it and itís back up at ride height. What the.......? I took it for a drive and it was fine. Iím thinking the shocks were frozen? Is that possible? The shocks are of unknown age and are mounted piston up which Iím guessing has allowed moisture in.
Well that's bizarre. Definitely seems like a shock issue tho like you said. I've seen some struts totally lock up before so doesn't seem totally out of the question.
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Old January 16th, 2018, 20:42
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Re: ZJ coil spring question

The shock issue does make sense. Especially since you don't get as hard of cold weather as others...and it's been cold lately.

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