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Discussion Starter · #1 ·
Every time the rear bottoms out, I hear and feel a loud clunk. I looked underneath, and sure enough most of the pass side bump stop has broken off. At the dealership a new one is $14, but I want to know if I can fix it myself easily.

How much is involved in getting the old stop off and putting the new one on?
 

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Pretty easy. Just need some metric hand tools.
 

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It's super easy. Just lift up the back end of the rig and you can access it through there. There is a bolt that goes right through the middle of the bump stop for you to replace it.

Seriously, don't let the stealership do it! It's easy!
 

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I don't remember if I took the spring out or not. I don't ever remember using a spring compressor for the back though. Maybe I'm just going crazy.
 

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All you need to do is undo sway link and shock and spring will fall out.
 

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i was hearing & feeling the rear bottoming out hard lately on my 07 w/ 58k miles and all stock suspension, but couldn't understand why. the springs seem fine, there isn't much sag at all. measuring from the ground to the fender lip through the center of the wheel i get:

lf 31 6/8
rf 31 6/8
lr 32 3/8
rr 32 7/8

the shocks seem fine too: they're not leaking, and they dampen well, the ride is not bouncy.

today when i removed the rear wheels to change brake pads i saw a possible reason for my problem: the bumpstops are completely disintegrated :eek: no more bumpstop material is left in the loaded space between the bumpstop plate and the part of the frame where the cup mounts. when i poked a finger inside the cup, small pieces of bumpstop crumbled down.

this would explain the harsh bottoming out - got my fingers crossed that new bumpstops resolve the issue. will i need to remove the springs to get the new bumpstops in?
 

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hey fellas, i literally changed mine today bc of constant bottoming out! Mine from Jeep were blue but I got a dealer to dealer discount bc of my Ford friends. Anyway, put it on my brother's lift, took off the wheels, took a flathead around the edge of the old broken down dry rotted ones, the new style isnt the kind that bolts thru. its one solid piece, with the exception of a tiny hole that only goes about 1.5in thru, to allow for the expansion on impact to prevent splittng and hard as hell to get into the cup. They are blue, has the extra ridges and weird oblong shape that locks into the ridge, lip and pressed in tabs(3 around each cup) and pops in. I had to use a little bit of lube and pry bar to get it all they way up, and took it for a test drive on a road under construction...no bottoming out = HAPPY ME, and when I tried to bottom out on purpose going over RR tracks, it popped the bumpers all the way in. and now I am good. I feel unstoppable lol..no pothole, speed bump, dip, or RRX will stop me now lol..
 

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ha, glad you finally got it taken care of, man. did you have to take the spring coils out to get the new bumpstops in? i just ordered mine 5 minutes ago. cost $17.69 each from factorymoparparts.com

the part number is 5290639AB, and they call them "JOUNCE STOP/BMPR"

i also ordered a couple quarts of transfer case fluid @ $40 each as i'm gonna need to change it soon. cost $12 to ship the whole lot.
 

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ha, glad you finally got it taken care of, man. did you have to take the spring coils out to get the new bumpstops in? i just ordered mine 5 minutes ago. cost $17.69 each from factorymoparparts.com

the part number is 5290639AB, and they call them "JOUNCE STOP/BMPR"

i also ordered a couple quarts of transfer case fluid @ $40 each as i'm gonna need to change it soon. cost $12 to ship the whole lot.
Yeah I was on that same website but i wanted to avoid shipping costs lol...and no sir, the bumpers squeeze right thru the spring of the stock suspension, as long as the rig is off the ground, and they may need a little push lol. Not sure what version of bumpers you will end up with, but mine did have recess at the base end that goes into the cup that will make up for the space of the original bolt that is still in there. only removed the wheels, some lube, wide pry bar and band-aid, from the pry bar and lube working out a plan to slice my pinky open lol..
 

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those are the ones!!!! it will take you 30 minutes of your morning...grab a bite to eat, wheels off, out with the old (make sure all the old is out) pop in the new ones...easy as 123
 

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how deep did yours go in? both of mine are sitting in the cups up to point A below, which only leaves about half an inch of spring travel before the bumpstop plate makes contact with the tip of the bumpstop. i assume it should be in there up to the ridge (point B) though. thought i'd take your approach and do a few speedbumps at speed, but that didn't help seat them any deeper.

 

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how deep did yours go in? both of mine are sitting in the cups up to point A below, which only leaves about half an inch of spring travel before the bumpstop plate makes contact with the tip of the bumpstop. i assume it should be in there up to the ridge (point B) though. thought i'd take your approach and do a few speedbumps at speed, but that didn't help seat them any deeper.

TWSS lmao lol...jk...but right over that edge of A, and pry bar cant get it any higher, trust me, my pinky knows as it was split open bc of the pressure of the fly back lol....and even when i tried to bottom out on purpose on a half new paved road, going slow, med and fast...and hitting speed bumps etc, SLAMMING, all it does now is bounce and they dont go up any higher, and I couldnt pull them out..
 

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Discussion Starter · #16 ·
TWSS lmao lol...jk...but right over that edge of A, and pry bar cant get it any higher, trust me, my pinky knows as it was split open bc of the pressure of the fly back lol....and even when i tried to bottom out on purpose on a half new paved road, going slow, med and fast...and hitting speed bumps etc, SLAMMING, all it does now is bounce and they dont go up any higher, and I couldnt pull them out..

I just picked mine up today... the same blue ones.. Ill pop them in tomorrow and let you all know how it went..

Thanks for the replies.. You have all taken a load off my mind...

I hope that my cups aren't damaged, because I have been bottoming out pretty hard.. especially when I have someone in the back seat....:eek:
 

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i was bottoming out hard for 8k miles before i fixed it, and my cups were fine. they are pretty stout. i fit mine with a pry bar and hammer, but if it's not going in, slap a little lube on it. i hear that's how navajo likes to do it :D
 

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I have the same style on mine but they're yellow. They are sitting in the cups up to point A from the factory. I have about a half inch of travel before they touch.
 

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Discussion Starter · #19 ·

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Discussion Starter · #20 ·
OK here we go...



Both were shot to hell...



Here is what I got out of there:



old vs. new



snapped in



both sides in..



spruced up the place.... now let's go find some dips..

 
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