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Old 05-02-2017, 02:30 PM
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TJ bump stops with 3.25 lift kit

Hello,

Trying to research if there is a formula for correct bump stops. I am adding a 3.25 lift kit and my current bump stops (factory) look pretty shot so I figure why not go ahead and replace them. Not sure what length I need. Sorry if it's been asked but I couldn't find a post.

Thanks in advance!

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Old 05-02-2017, 02:36 PM   #2
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Only you can be the one to answer that by cycling your suspension and determining interference points and/or shock limits.

For fronts, stick with what you have (replace with OEM), and add the new bumpstops to your spring perch on the axle. Rear can actually be a longer bumpstop extension.

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Old 05-02-2017, 05:42 PM   #3
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Originally Posted by tworley View Post
Only you can be the one to answer that by cycling your suspension and determining interference points and/or shock limits.

For fronts, stick with what you have (replace with OEM), and add the new bumpstops to your spring perch on the axle. Rear can actually be a longer bumpstop extension.
x2. Also depends on tire size and wheel backspacing (bigger the tire, the more the bump stop you need to keep the tires out of your fenders).

I would replace the old ones with OEM ones, do not get the aftermarket hard urethane style (as stated above). The factory ones are soft and have some give to them when they make contact with the spring perch.

As far as length, use hockey pucks or rubicon express bump stop extensions (or both like I do). I run about 4" of suspension lift and a 1.25" body lift and clear 35's offroad with the proper amount of bump stop.

Follow this tech article. It's for a Cherokee, but the same applies to the front of a TJ. For the rear, I would just get bump stop extensions (Rubicon Express, Old Man Emu, etc. all make them for cheap)

Adjusting Bumpstops
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Old 05-02-2017, 06:09 PM   #4
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Old 05-02-2017, 06:57 PM
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Thank you for the great information. I went ahead and purchased the rear bump stop extensions...they weren't too much so I figured I rather have them them ready to install if I need them instead of having to wait a few days.
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Old 05-04-2017, 12:09 AM   #6
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Thank you for the great information. I went ahead and purchased the rear bump stop extensions...they weren't too much so I figured I rather have them them ready to install if I need them instead of having to wait a few days.
If you get the bump stops to long it's not good either.
Bump stops stop the suspension up travel.
But to long of a bump stop can cause to little travel, which can give you a jolting ride.
Best to do as the guys above said.
Good luck.
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Old 05-04-2017, 09:58 AM   #7
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If you get the bump stops to long it's not good either.
Bump stops stop the suspension up travel.
But to long of a bump stop can cause to little travel, which can give you a jolting ride.
Best to do as the guys above said.
Good luck.
X2. Bumps should be just long enough to keep things from bashing into other things. But they shouldn't be any longer than they need to be.

One of the most helpful things a Jeep owner can do to understand the suspension is take the time to set the bump stops.

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