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Old 08-30-2010, 12:07 PM   #1
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Rear Lower Shock Mount Relocator

I was told by a friend that these would be a good idea as I look to put on a 4" lift in the next few weeks. Any other opinion on the need for this $40 option?

This is the one I am looking at on Quadratec - TeraFlex Rear Lower Shock Mount Relocator Kit

Thanks.

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Old 08-30-2010, 01:43 PM   #2
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Yea, it's worth it, helps keeps the shock body clear of the perch and keep it at a good angle as well. JKS also makes them as well.

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Old 08-30-2010, 07:23 PM   #3
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Not only is it worth it, IMO it's necessary for the above stated reason: clearance.
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Old 08-30-2010, 07:27 PM   #4
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A lower shock mount extender is only needed if you install a CV driveshaft. But in reality, extending the mount further out just makes it far easier and nire likely that a trail obstacle can rip the shock mount away from its weld at the axle. That is due to the significantly increased leverage against the weld the extender adds.

It's better to either grind additional clearance into the lower spring bucket or invert the shocks so the shock strut is next to the lower spring bucket which provides added clearance.

Again, you don't need to do any of this until you install a CV driveshaft which requires the axle be rotated to raise the pinion angle... which pulls the lower shock mount in close which can cause the shock can to rub against the lower spring bucket.
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Old 08-30-2010, 07:56 PM   #5
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If I understand right the Rubicon doesn't have a CV joint, right? If this assumption is correct maybe I need to look at my rear shock mounts because my Rubicon had extenders installed when I bought it. Maybe I need a good pic of a CV joint and a non CV joint.
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Old 08-30-2010, 07:59 PM   #6
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The Rubicon does not come with a rear CV driveshaft, although its front DS is a CV. So you should not require those lower shock mount extenders. In fact, I would remove them as that would make the lower shock mounts stronger by removing that extra leverage against the OE mount and welds that the extender gives.

The OE non-CV rear driveshaft has a total of two u-joints, one at the rear and one at the front. If the PO installed a CV driveshaft at the rear, it would have three u-joints... one at the rear and two at the front.
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Old 08-31-2010, 07:14 AM   #7
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Quote:
Originally Posted by Jerry Bransford View Post
A lower shock mount extender is only needed if you install a CV driveshaft.

Again, you don't need to do any of this until you install a CV driveshaft which requires the axle be rotated to raise the pinion angle... which pulls the lower shock mount in close which can cause the shock can to rub against the lower spring bucket.
Thanks for the advice Jerry. You are the man. Would I need a CV driveshaft with a 4" lift? I am hoping not.

Thanks again.
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Old 08-31-2010, 06:35 PM   #8
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Quote:
Originally Posted by Jerry Bransford View Post
The Rubicon does not come with a rear CV driveshaft, although its front DS is a CV. So you should not require those lower shock mount extenders. In fact, I would remove them as that would make the lower shock mounts stronger by removing that extra leverage against the OE mount and welds that the extender gives.

The OE non-CV rear driveshaft has a total of two u-joints, one at the rear and one at the front. If the PO installed a CV driveshaft at the rear, it would have three u-joints... one at the rear and two at the front.
Jerry, just crawled under my Jeep and it appears I have one u-joint at each end of both the front and rear driveshafts. According to your first sentence, one end of my front DS should have two u-joints. Am I reading your post correctly? If so, was the 03 different for some reason. Thanks.
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Old 08-31-2010, 06:42 PM   #9
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The front CV driveshaft has its CV joint next to the transfer case.
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Old 08-31-2010, 07:17 PM   #10
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^^^^^^^^^Well, now I really feel like a dumb sh*t. Went back out and looked after seeing another thread with pics of a double cardin u-joint and sure enough there it was, right up by the transfer case. Thanks for the lesson Jerry. Much appreciated.

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