CJ7 Rear leaf spring problem? - Off-Road Forums & Discussion Groups
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post #1 of (permalink) Old 05-16-2005, 08:12 PM Thread Starter
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CJ7 Rear leaf spring problem?

So I had a great time at the bash. So I was on the last obstacle of the day --



When Jeff and Mark noticed that my right rear spring was "folded" -- I did not see it. Anyway, we decided to pull cable and winch out instead of risking further damage.

So I got it on the trailer and saw this.



Well, to me that does not look too bad. You can see some separation between the main leaf and the rest of the pack between the axle and the spring clamp.

Well, I took it off of the trailer and turned hard right and noticed this. The Jeep does not lean this much normally.



So I looked at the spring and saw this.



It is easy to see the "crease" in the spring in that picture.

So, is this spring salvageable? Would you drive on it? I did end up buying a new leaf pack, but am concerned that the new pack will sit taller than the old one. Would it be OK to take the main leaf out of the new pack and put it in the old pack?

Thanks,
Mike
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post #2 of (permalink) Old 05-16-2005, 09:22 PM
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Re: CJ7 Rear leaf spring problem?

If you change the whole pack you should change both sides. Just using the main leaf wouldnt really change much of the lift. Or you could take the spring off and take it to a spring shop and they can straighten it.
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post #3 of (permalink) Old 05-16-2005, 09:38 PM
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Re: CJ7 Rear leaf spring problem?

I kinked a front much worse than that over two years ago. Put it in the shop press and fiddled with it for a while and got it back where it's supposed to be. It's worked fine ever since.

The trick is to devise a method for measuring bend you put in with the press. Then release the pressure and check the results. If you need more go a little farther. Repeat until it's where it should be.

Use relatively small steps. I supported the spring about three inches on either side of the kink. Initially I bent it maybe a half inch. That did nothing, so I gave it 3/4". That straightened it a little, so from there on I went in 1/8" increments until it was good as new. Those numbers may not be exact - my memory isn't what it used to be [img]/ubbthreads/images/graemlins/codger.gif[/img] but that's the idea.
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post #4 of (permalink) Old 05-16-2005, 09:45 PM
 
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Re: CJ7 Rear leaf spring problem?

i wouold move it to the other side of the jeep if i where to use it, as to put it on the side not recieving as much torque.
i saw just how far it was bent, and would pitch it in the junk.
i have run bent leaf springs, and undetr the rear of a locked rig doing uphill climbs it will not last long.......
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post #5 of (permalink) Old 05-16-2005, 10:05 PM
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Re: CJ7 Rear leaf spring problem?

or you can do like Caver after he made his look like an elbow... bottle jacked it back up and wrapped it about 200 tiimes in DUCT TAPE!!!!! [img]/ubbthreads/images/graemlins/grin.gif[/img]
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post #6 of (permalink) Old 05-16-2005, 10:09 PM Thread Starter
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Re: CJ7 Rear leaf spring problem?

[ QUOTE ]
... bottle jacked it back up and wrapped it about 200 times in DUCT TAPE!!!!! [img]/ubbthreads/images/graemlins/grin.gif[/img]

[/ QUOTE ]

Now those are some tools that I own...

Who needs a press when you have a bottle jack and duck tape.

-- Mike
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post #7 of (permalink) Old 05-16-2005, 11:18 PM
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Re: CJ7 Rear leaf spring problem?

I've bent a couple and have snapped one.
I just replace um one at a time, I even cary a spare.
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post #8 of (permalink) Old 05-17-2005, 01:24 AM
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Re: CJ7 Rear leaf spring problem?

That is not bad, so you might luck out in bending it back. However, every broke spring I have seen had almost the same story....got bent once (or twice), bent it back....and eventually broke in the same place.

They don't call it spring steel for nothing. Once you have stressed it enough to exceede it's 'shape memory' (can't remember the exact term), the material has lost some of it's strength and it's only a matter of time before it breaks.

This might be a good time to go SOA.
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