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Old 01-13-2020, 04:29 PM
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What is the tube within the front springs called?

While working on my brakes on my Jeep TJ, I noticed that within the springs on the front, there is a tube. I poked at the bottom of the tube and the rubber or whatever material the insert was made from crumbled and fell out. Can you tell me what this tube is used for and can it be replaced? If not replaced, can you replace the piece that crumbled? Do I need this piece if I don't go offroad? Thanks for the help.

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Old 01-13-2020, 04:37 PM   #2
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I believe you want to replace the jounce bumper
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Old 01-13-2020, 04:38 PM   #3
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Jounce cup, and the jounce bumper is what fell out. You can go to a junkyard and find replacements out of a ZJ. Detrimental to keeping things from crashing into each other hard if your bumpstops are set correctly.
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Old 01-13-2020, 06:32 PM
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Thank you both.
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Old 01-14-2020, 09:49 AM   #5
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Rather than go to a junkyard and get old weathered bump stops, here is a selection of aftermarket ones. I need to replace mine as well.

https://www.quadratec.com/vehicle/19...ion/bump-stops

If you have not already done so, contact Quadratec on your first order and let them know you are a member of the Wrangler Forum and ask for a quote. Also ask them to set up up in their system and then when you purchase on line, they will include the discount they give members.
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Old 01-14-2020, 10:06 AM   #6
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Originally Posted by rgreen65 View Post
Rather than go to a junkyard and get old weathered bump stops, here is a selection of aftermarket ones. I need to replace mine as well.

https://www.quadratec.com/vehicle/19...ion/bump-stops

If you have not already done so, contact Quadratec on your first order and let them know you are a member of the Wrangler Forum and ask for a quote. Also ask them to set up up in their system and then when you purchase on line, they will include the discount they give members.
note: the ones that state they are extended are not recommended. the jounce bumper should compress inside the cup cushioning the hit but the cup is the bumpstop point.
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Old 01-15-2020, 01:33 PM   #7
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Quote:
Originally Posted by fishfun83 View Post
While working on my brakes on my Jeep TJ, I noticed that within the springs on the front, there is a tube. I poked at the bottom of the tube and the rubber or whatever material the insert was made from crumbled and fell out. Can you tell me what this tube is used for and can it be replaced? If not replaced, can you replace the piece that crumbled? Do I need this piece if I don't go offroad? Thanks for the help.
They keep the shocks/suspension from over compressing and are an integral part of your TJ's suspension system. If you have stock springs/shocks, you can use something like this:

Energy Suspension 2.9101G BUMP STOP SET JEEP TJ

https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1

If your TJ is anything like mine, I had to replace the metal cups the bumpers slide into:

4 Piece Set of Jounce Bumper Retainer Cups Replacement for Jeep SUV 52087635

https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1

Due to rust, I also had to custom fabricate the round pipe that connects to the retainer cups. It was a pretty involved job and not all that fun. Hopefully, you'll only need to replace the bump stops.

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Old 01-15-2020, 02:40 PM   #8
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Do not buy rubber jounce bumpers. The Crown and the Omix bump stops shown on the previous quadratec link are direct replacements for the OEM bump stop. These are made of a hard, yet compressible, material so that they function like a damper but will allow your suspension it's full range of motion. That is what you want.
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