Front Bump Stop Replacement

[c20040215]

If I were doing it again, I would do this instead of add pads on the axle.

https://www.rockjock4x4.com/RJ-107102-101
https://www.rockjock4x4.com/RJ-107101-101

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[BDinTX]

If I were doing it again, I would do this instead of add pads on the axle.

https://www.rockjock4x4.com/RJ-107102-101
https://www.rockjock4x4.com/RJ-107101-101

I think this is a good option for non diesel/392/XR Jeeps. Those all have jounce tubes that are 1-3/8" longer to begin with. I used the same thing from another manufacturer when I put on the lift. My up travel didn't improve enough so I took them out and put a 1/2" pad on the axle instead.

Same issue on the adjustable ones but I really like them! 1.89" to 3.15" is a decent range.

 

[John VonJeep]

Can you help me understand how they justify $500 for a full set of OEM length bump stops? That seems crazy high unless I'm missing something...

From a cost perspective? Nope. The question is just: do you want the solution or not? Durobumps is wholly in line with other rubber solutions, like Timbrens:

https://www.northridge4x4.com/part/absjrjk-timbren-active-off-road-rear-bump-stop-kit

And both are far below “active” bump stop solutions in price. I ran Timbrens on my JK and loved them. I like how rubber is totally maintenance free and essentially indestructible. Yet when you hit the stop it’s so soft and controlled.

If someone thinks these could be offered for, say, $99, then I would encourage them to start manufacturing their own progressive rubber stops and undercutting Timbren and Durobumps. Should be easy pickings, right?

 

[Remorseless]

From a cost perspective? Nope. The question is just: do you want the solution or not? Durobumps is wholly in line with other rubber solutions, like Timbrens:

https://www.northridge4x4.com/part/absjrjk-timbren-active-off-road-rear-bump-stop-kit

And both are far below “active” bump stop solutions in price. I ran Timbrens on my JK and loved them. I like how rubber is totally maintenance free and essentially indestructible. Yet when you hit the stop it’s so soft and controlled.

If someone thinks these could be offered for, say, $99, then I would encourage them to start manufacturing their own progressive rubber stops and undercutting Timbren and Durobumps. Should be easy pickings, right?

At the same time though, you can blow through 4-5 sets of closed cell foam progressive bumps for the same price. My experience has been those tend to last years, and you can take that extra savings and put it towards better shocks making it less likely you need fancier bump stops anyway.

 

[John VonJeep]

At the same time though, you can blow through 4-5 sets of closed cell foam progressive bumps for the same price. My experience has been those tend to last years, and you can take that extra savings and put it towards better shocks making it less likely you need fancier bump stops anyway.

All fair points. And let’s be honest: pretty much any solution is better than the stock hockey pucks.

 

[LukeDagny]

You’re talking about the jounce bumper , or upper bump stop , right ? The rears are easy, can do it with bare hands, but the fronts I had to remove the spring….

I talking the upper jounce bumper, and hope to replace with the spring in place per this video;

 

[BDinTX]

Great find! I might try that too!

 

[Midwestjeepguy]

From a cost perspective? Nope. The question is just: do you want the solution or not? Durobumps is wholly in line with other rubber solutions, like Timbrens:

https://www.northridge4x4.com/part/absjrjk-timbren-active-off-road-rear-bump-stop-kit

And both are far below “active” bump stop solutions in price. I ran Timbrens on my JK and loved them. I like how rubber is totally maintenance free and essentially indestructible. Yet when you hit the stop it’s so soft and controlled.

If someone thinks these could be offered for, say, $99, then I would encourage them to start manufacturing their own progressive rubber stops and undercutting Timbren and Durobumps. Should be easy pickings, right?

At the same time though, you can blow through 4-5 sets of closed cell foam progressive bumps for the same price. My experience has been those tend to last years, and you can take that extra savings and put it towards better shocks making it less likely you need fancier bump stops anyway.

Ok the difference is closed cell foam performance/cost vs rubber performance/cost. Closed cell foam, even if described as progressive, has a harder jolt than rubber when it hits? So the question is do you want a softer stop and pay 4x-5x the price of a closed cell foam option?

Seems like with any other Jeep mod there are multiple options/solutions that vary in cost. Just comes down to personal preference. Feel like I got more smarter today, thank you both for the explanation!

 

[c20040215]

My experience is that those longer and "better" jounce bumpers never perform the way manufacturers advertise. Its not the longer or better materials that do not work. They never get compressed straight when articulating the suspension. They always get compressed and folded side ways. They only get compressed straight when jumping where both side of the axle go up at the same time, which... not too many people jump their jeeps.

That's why I said I would go a different route if I were doing it again.

 

[Roky]

I talking the upper jounce bumper, and hope to replace with the spring in place per this video;

Ok….. that’s to much fiddle farting around for me, it takes me about 5-7 minutes to take my spring out, but then I do this shit about every weekend…….

 

[LukeDagny]

Ok….. that’s to much fiddle farting around for me, it takes me about 5-7 minutes to take my spring out, but then I do this shit about every weekend…….

The last time I took a spring out, I wasn't slow, and I wasn't fast. I was half fast, and it took me all day

 

[RudeJeepin]

That's why I said I would go a different route if I were doing it again.

And what route would that be???

 

[c20040215]

https://www.jlwranglerforums.com/forum/threads/front-bump-stop-replacement.137943/post-2880168

Plus stock jounce bumpers.

 

[ArmyRN]

If anybody is discovering this in the future (op has found his solution) Durobumps makes a no-lift version if you just want a better/softer/more progressive bump stop than stock.

https://durobumps.com/product-category/jeep/jl/

I've got an XR with the 1&3/8" longer jounce tube. Even with a 1/2" spacer lift there's not much space before contact. So I'm not interested in a taller bumpstop - if anything I want a shorter one. I wonder if this Durobump no-lift version is any shorter. Or if the same size, would compress more.

 

[AnnDee4444]

IMO bump stops provide similar benefits of progressive springs: they provide an increased rate at the end of the travel. All bump stops do this, with the stock ones only being ~1". They should be looked at as a range from zero (no bump stop) to the tallest (~4"?), while considering their internal spring rate & compressible travel.

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