Rear shocks - 2006 TJ - JeepForum.com
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post #1 of 35 Old 06-06-2020, 02:19 PM Thread Starter
Clarence_Beeks
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Rear shocks - 2006 TJ

Hello group,


Needing your help. I have to replace the rear shocks on our 2006 TJ. I'm not the original owner, but our TJ definitely has a lift, (and I have 33" KO2's on her).


I'm attaching pics for one of the rear shocks. I've scanned the Internet, and can't seem to find these Rough Country shocks anywhere, (to help me figure out the size I should order for a replacement).



I did measure the front and rear springs, and it looks like the front is around 15-16", and the rear springs are around 11-12". Figuring it was around a 3-4" lift, I went with some Bilstein 33-185514 B8 5100's. it was noted these shocks were for 3.5-4" lifts. Man, what a bear it was to get one of them into place. It was so compressed, I don't see how it could function. (The rubber boot was so smashed up, etc). So I took it out and plan to send them back.



In one of my pic's, you can see I have a tape measure which shows the fully extended original shock at around 24" eye to eye. Please take a look at the pics, and share your feedback. Would appreciate your help with finding a good replacement for the rears. (I originally went with the Bilstein 5100's, because I really like them on my 2018 F-150 4x4).



TIA for your help!


C_B

Attached Thumbnails
shock2.jpg   shock1.jpg   shock3.jpg  

This is as far as we go. No more cockamamie cigar smoke. No more Swedish meatballs there, tootsie.
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post #2 of 35 Old 06-06-2020, 04:14 PM
Duck Doctor
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Those Bilsteins have a compressed length of 15.4” and extended length of 25”. You shouldn’t be installing those shocks with the boots. Remove the black rubber boots and reinstall. Don’t think anyone has used shock boots since Bad Boy Club stickers stopped appearing on lifted Yoters in the early 90s.
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post #3 of 35 Old 06-06-2020, 04:28 PM
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Quote:
Originally Posted by Clarence_Beeks View Post
I've scanned the Internet, and can't seem to find these Rough Country shocks anywhere.

It was so compressed, I don't see how it could function.

C_B
That's a good thing. You should replace all 4 of those terrible riding old style RC shocks. Try some Rancho RS5000X. You can go on their site and get the exact length you need. It sounds like your shocks might be too long. It's hard to tell without a pic of them installed.
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Quote:
Originally Posted by jeepinmichguy_ View Post
TheBoogieman is a jerk.
GOT IT BACK on 6/17. 03' Rubicon/Zone 4.25" combo lift with 4" lift coils up front/Zone hydro shocks/5.13 gears/35" Mickey Thompson MTZ P3 tires/Black Magic brakes. Jeep #17 & 19.
SOLD 99' XJ /4.0L-AW4/ 5.5" lift / 33" DC tires.
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post #4 of 35 Old 06-06-2020, 05:02 PM Thread Starter
Clarence_Beeks
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Quote:
Originally Posted by Duck Doctor View Post
Those Bilsteins have a compressed length of 15.4” and extended length of 25”. You shouldn’t be installing those shocks with the boots. Remove the black rubber boots and reinstall. Don’t think anyone has used shock boots since Bad Boy Club stickers stopped appearing on lifted Yoters in the early 90s.

understood about the boots, I can cut them off and dump 'em. Please check out these pic's. Do you thing the Bilstein is still a keeper? I still have those shocks. Looks like the Bilstein's are about a 1/2" to an 1" taller
Attached Thumbnails
shock4.jpg   shock5.jpg  

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post #5 of 35 Old 06-06-2020, 05:08 PM Thread Starter
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Quote:
Originally Posted by TheBoogieman View Post
That's a good thing. You should replace all 4 of those terrible riding old style RC shocks. Try some Rancho RS5000X. You can go on their site and get the exact length you need. It sounds like your shocks might be too long. It's hard to tell without a pic of them installed.

Man, I'll tell you what. There is absolutely NO DAMPENING with these old shocks. I can push them down and slide them up and down by hand.



What prompted me was the upper mount on the one rear shock had the rubber grommet blown out to the side. It was just metal to metal contact.... Chirp, chirp, chirp....



I do intend to replace ALL of the shocks. The rear just appear to be totally smoked with the grommets blown out. Heck, even the steering stabilizer is an old rough country thingy... I'll replace that too!
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post #6 of 35 Old 06-06-2020, 05:34 PM Thread Starter
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Here's a pic of the rear driver side shock (which is still installed. The passenger side is removed).

So with the old shock, it appears to be close to 20 1/2" for "at rest". Granted, my tape measure check was to the best of my ability, with a left handed iPhone shot, while trying to keep the tape measure steady and flush....

So if the the Bilstein is 25" at full, and 15.4" compressed, and the "old" shock is at rest of 20 1/2", should be cool? It seems to be right in the middle. Sounds right?

Install the Bilstein's, cut the boots, and I should be good to go?

TIA,
C_B
Attached Thumbnails
shock6.jpg  

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post #7 of 35 Old 06-07-2020, 04:37 AM
joe_jeep
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for a while, rc was known to have shocks too long in their kits.
this is possibly the reason the upper bar pin bushing is blown out.

around half its available travel should be up, around half should be down.
should be near center of its travel range at ride height give or take.
assuming its a 4" lift, it probably needs about a 9" to 10" travel shock in the rear.
moving the shock mounts in the rear to fit a long shock is not super hard.
about 11" travel shock in front should fit pretty well.
these are round numbers, every lift is slightly different.

while your working on it, now is the time to bump stop correctly.
your shock should never be your bump stop!
set it up for balanced travel.
you will probably need around 2" of bump stop extension front and rear from stock.
check to make sure your front track bar is not contacting the diff cover in front at full stuff.
common problem area, not super safe!

glfwda #6624
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post #8 of 35 Old 06-07-2020, 08:05 AM Thread Starter
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Quote:
Originally Posted by joe_jeep View Post
for a while, rc was known to have shocks too long in their kits.
this is possibly the reason the upper bar pin bushing is blown out.

around half its available travel should be up, around half should be down.
should be near center of its travel range at ride height give or take.
assuming its a 4" lift, it probably needs about a 9" to 10" travel shock in the rear.
moving the shock mounts in the rear to fit a long shock is not super hard.
about 11" travel shock in front should fit pretty well.
these are round numbers, every lift is slightly different.

while your working on it, now is the time to bump stop correctly.
your shock should never be your bump stop!
set it up for balanced travel.
you will probably need around 2" of bump stop extension front and rear from stock.
check to make sure your front track bar is not contacting the diff cover in front at full stuff.
common problem area, not super safe!

thanks for the feedback. I'll look further into the bump stop extension, indeed a good point.


As it appears right now, the Bilstein's are 25" fully extended, and 15.4" fully compressed. And if after install they're near 20.4" at rest that the current shock has, then I should have the required 9-10" of travel it seems.

This is as far as we go. No more cockamamie cigar smoke. No more Swedish meatballs there, tootsie.
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post #9 of 35 Old 06-07-2020, 04:18 PM
joe_jeep
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the best way, is remove the springs, shocks, and rubber bump stop pads.
push one side all the way up to the metal to metal bump stops.
measure the space between the upper and lower shock mounts.
get a shock with a compressed length 1/4" to 3/8" more compression than u need, but as long extended as possible.
this maximizes travel, but everyone hates that option.
the rear is easier to work with than the front imho.

worst case scenario, you could extend the bump stops, to make that shock work, unless its way off.
you often end up with biased travel then.
more droop then up travel.
most like as much up travel as possible.

you have to bump stop the travel, with at least 1/4 in of shock shaft showing.
thats what is important!

glfwda #6624
2005 rubicon sahara lj #592
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post #10 of 35 Old 06-08-2020, 04:50 PM Thread Starter
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Looks like for the rear, the top bump stop is about 3.75" in length. Definitely has an extender. The bottom stop, (pad, whatever), that's also inside the spring is about 1.25-1.5" in height. The front bump stops (top) look really long. Almost twice the length of the rear. I'll take a more accurate measure for both later....


thx

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post #11 of 35 Old 06-08-2020, 05:57 PM Thread Starter
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figure I'd throw in a pic of our rig. :-)
Attached Thumbnails
T1.jpg  

This is as far as we go. No more cockamamie cigar smoke. No more Swedish meatballs there, tootsie.

Last edited by Clarence_Beeks; 06-08-2020 at 06:20 PM. Reason: syntax
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post #12 of 35 Old 06-09-2020, 09:19 AM
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Quote:
Originally Posted by Clarence_Beeks View Post
figure I'd throw in a pic of our rig. :-)
Nice looking Jeep. Is that Impact orange or red with dust on it?
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Quote:
Originally Posted by jeepinmichguy_ View Post
TheBoogieman is a jerk.
GOT IT BACK on 6/17. 03' Rubicon/Zone 4.25" combo lift with 4" lift coils up front/Zone hydro shocks/5.13 gears/35" Mickey Thompson MTZ P3 tires/Black Magic brakes. Jeep #17 & 19.
SOLD 99' XJ /4.0L-AW4/ 5.5" lift / 33" DC tires.
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post #13 of 35 Old 06-09-2020, 02:52 PM Thread Starter
Clarence_Beeks
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Originally Posted by TheBoogieman View Post
Nice looking Jeep. Is that Impact orange or red with dust on it?
Thanks. Indeed, it is Impact Orange.

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post #14 of 35 Old 06-10-2020, 03:11 PM
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Did you take a compressed measurement of the old shocks?
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post #15 of 35 Old 06-10-2020, 05:05 PM Thread Starter
Clarence_Beeks
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Originally Posted by Wheelin98TJ View Post
Did you take a compressed measurement of the old shocks?
easy enough to do. Here's a pic of one of those POS's. It looks around 14.5" compressed, eye to eye. doesn't even push or spring back, totally blown out.
Attached Thumbnails
shock7-1.jpg  

This is as far as we go. No more cockamamie cigar smoke. No more Swedish meatballs there, tootsie.
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