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Old 12-29-2010, 04:18 PM   #1
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Bump Stop Question

Ok, I am getting ready to install my 3.25" suspension lift on my 97' TJ and will be keeping my stock track bars until I decide what I want to do next (axle wise). I will be running 31's on my rig for now. Do I need to buy new bump stops for the front and rear and if so what size? I will be wheeling this rig.

Thanks in advance for all input!!

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Old 12-29-2010, 06:30 PM   #2
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bumpstop length will depend on shock length, not lift height.

read this: http://www.wranglerforum.com/f5/corr...gth-70047.html

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Old 12-29-2010, 06:53 PM   #3
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So, not if you haven't changed the shock length. 31's come stock on TJ Rubicons, so you are fine with them. The only problem you may encounter is rubbing at full lock depending on the actual width of your tires. That is easily fixed with a washer or two on the steering stops.
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Old 12-29-2010, 09:02 PM   #4
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So, not if you haven't changed the shock length.
the OP installed a 3.25" lift, the shock length has changed. And don't expect RC to know what they're doing. They don't include bumpstops.

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31's come stock on TJ Rubicons, so you are fine with them.
Ever look at a TJ Rubicon's front axle spring pad? Interestingly enough there is ~1/4 to 3/8" steel plate welded to the spring pad....factory bumpstop extension
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Old 12-29-2010, 09:07 PM   #5
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I would be more worried about keeping the front stock track bar.
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Old 12-29-2010, 11:23 PM   #6
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I would be more worried about keeping the front stock track bar.
Why would you say that?
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Old 12-29-2010, 11:27 PM   #7
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Originally Posted by InfernoGirl View Post
So, not if you haven't changed the shock length. 31's come stock on TJ Rubicons, so you are fine with them. The only problem you may encounter is rubbing at full lock depending on the actual width of your tires. That is easily fixed with a washer or two on the steering stops.
I'm an SE not a Rubi.
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Old 12-29-2010, 11:34 PM   #8
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Why would you say that?
Probably because they are not long enough for that much lift, unless they are properly relocated along with proper pit-man arm geometry to coincide with the trackbar's new position.
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Old 12-29-2010, 11:53 PM   #9
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^^^^^^^That makes sense.

Thanks.
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Old 12-29-2010, 11:56 PM   #10
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Thumbs up

Quote:
Originally Posted by UnlimitedLJ04 View Post
bumpstop length will depend on shock length, not lift height.

read this: http://www.wranglerforum.com/f5/corr...gth-70047.html
Thanks!!
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Old 12-30-2010, 08:20 AM   #11
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Quote:
Originally Posted by UnlimitedLJ04 View Post
the OP installed a 3.25" lift, the shock length has changed. And don't expect RC to know what they're doing. They don't include bumpstops.


Ever look at a TJ Rubicon's front axle spring pad? Interestingly enough there is ~1/4 to 3/8" steel plate welded to the spring pad....factory bumpstop extension
Ahhhhh, thank you I did not read closely enough....
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Old 12-30-2010, 08:32 AM   #12
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Wink

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Ahhhhh, thank you I did not read closely enough....
You're awesome IG. You get an A+ for effort.
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Old 12-30-2010, 08:46 AM   #13
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I would be more worried about keeping the front stock track bar.
nothing wrong with using the stock front track bar...if you modify things appropriately. I wish I'd done that vs all the problems I had with adjustable front track bars hitting my diff cover. Finally dialed in, after over a year of bs.

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Why would you say that?
The modifications front stock track bar include using a shop press to bend the axle side of the track bar to clear the stock mount at full droop, then welding a plate to the stock axle side mount and drilling a new hole that will center the axle.

Otherwise you end up adding a lot of bumpstop to clear aftermarket diff covers. Adding 3" of bumpstop extension on a 2.5" lift eliminates all the uptravel gained by the lift...kinda dumb.

Read these:
Broken front track bar bracket - JeepForum.com
tj front adjustable track bars for 0-3.5", does yours hit or fit? - JeepForum.com
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Old 12-30-2010, 09:01 AM   #14
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Originally Posted by UnlimitedLJ04 View Post
nothing wrong with using the stock front track bar...if you modify things appropriately. I wish I'd done that vs all the problems I had with adjustable front track bars hitting my diff cover. Finally dialed in, after over a year of bs.



The modifications front stock track bar include using a shop press to bend the axle side of the track bar to clear the stock mount at full droop, then welding a plate to the stock axle side mount and drilling a new hole that will center the axle.

Otherwise you end up adding a lot of bumpstop to clear aftermarket diff covers. Adding 3" of bumpstop extension on a 2.5" lift eliminates all the uptravel gained by the lift...kinda dumb.

Read these:
Broken front track bar bracket - JeepForum.com
tj front adjustable track bars for 0-3.5", does yours hit or fit? - JeepForum.com

I'm only trying to clear the stock D30 diff cover. I wouldn't think that would require very much bump stop extension.
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Old 12-30-2010, 09:38 AM   #15
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Originally Posted by Chanch0 View Post
I'm only trying to clear the stock D30 diff cover. I wouldn't think that would require very much bump stop extension.
depends what track bar you use. read the thread.

For example - Rough Country - don't even think about it. Rubicon Express: ~3" extension, JKS - ~2.5", Currie TJS, ~1.5-2".
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Old 12-30-2010, 10:07 AM   #16
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Thanks for the info. I'm also exploring the idea of having a local shop fab me new front and rear tb's as the new lift goes on.
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Old 12-30-2010, 10:19 AM   #17
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Thanks for the info. I'm also exploring the idea of having a local shop fab me new front and rear tb's as the new lift goes on.
make sure they use 1/4" wall DOM or better yet Chromoly tubing. they'll need to check the clearances through the entire suspension cycle...full bump to full droop with the springs removed. most places don't have a tube bender die with a short enough radius to make a bend capable of clearing the diff cover.
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Old 12-30-2010, 10:30 AM   #18
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I'll do that. Thanks for the advice.

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