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3.5 inch lift with 35's and my tire nearly took out the fender

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Old 08-06-2007 | 11:21 AM
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Question 3.5 inch lift with 35's and my tire nearly took out the fender

Ok... with a 3.5inch lift and quick disconnects, my 35" tires just about ripped my fender off. Actually, it did take out the bolt on the bottom rear right side of my front fender during extreme articulation. :confused:

When I put it on the ramp, it looked like it had the clearance. Has anyone else run into this problem...

My thought on a fix was flat fenders (good excuse for a mod) but have to wait on the funds... any quick fix ideas? Bump Stops??
Old 08-06-2007 | 12:36 PM
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what wheels and backspacing are you running?
Old 08-06-2007 | 01:01 PM
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What kit are you using? If it didn't come with bump stops you should get them. You could use pucks or round aluminum stock for the front and some 2x3 Aluminum stock for the rear.
Old 08-06-2007 | 03:15 PM
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Never thought of using pucks... that's a great idea. Thanks. I just need something to tie me over until I get my flat fenders. Pucks will do the job. Thanks
Old 08-06-2007 | 06:55 PM
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OK, get ready, because I'm going to be a smartass...

Originally Posted by 2climbbig
... I have rusty's coils... They have the ideal spring rate (180 lbs) for crawling. As a result, no bump stops are needed (assuming 28 inch shocks)...
Originally Posted by Renegade
I have never heard such... Wouldn't they have to be pretty stiff to allow larger tires and limit the up-travel without bump stops?
Originally Posted by 2climbbig
...Using the current bump stops, you have around 7" of upward travel. Full compression on the shocks require 7.5" of travel. Therefore you don't have to extend the length of the current bumpstops...
Originally Posted by 2climbbig
Ok... with a 3.5inch lift and quick disconnects, my 35" tires just about ripped my fender off. Actually, it did take out the bolt on the bottom rear right side of my front fender during extreme articulation. :confused:
Here's the lesson: if you don't limit your up-travel at all and you have larger than stock tires, you WILL have contact issues. The flat fender idea may work, but at quite an expense. Call Teraflex, Full Traction, or one of the other companies and they will probably sell you a bump stop relocation "kit" until your flat-fender idea is worked out. Good luck.

Last edited by Renegade; 08-06-2007 at 06:59 PM.
Old 08-06-2007 | 11:21 PM
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Originally Posted by Renegade
Here's the lesson: if you don't limit your up-travel at all and you have larger than stock tires, you WILL have contact issues. The flat fender idea may work, but at quite an expense. Call Teraflex, Full Traction, or one of the other companies and they will probably sell you a bump stop relocation "kit" until your flat-fender idea is worked out. Good luck.
I couldn't agree more. It is also interesting how often this fact is overlooked. One should always make sure that the suspension can travel from full compression (allowing for additional compression of the bump stops) to full droop without any interference from the tires, suspension members or steering components. You must be able to accommodate full steering lock, left and right, at both limit positions and everywhere in between. Spring rates have nothing to do with it. If you wheel hard, you will compress the springs to their full extent at some time and the only thing stopping your tires or some part of your suspension or steering from hitting something is the bump stops.

Similarly, one should check that the driveshafts have sufficient engagement of the splines when the axles are at full droop. While you're at it, make sure that the brake lines have plenty of slack when at full droop, the vent lines have slack and any wiring (like ABS wiring) has sufficient slack.

One way to do all of this, at least for coil sprung vehicles, is to assemble the new lift without the springs, place jack stands under the chassis and then use floor jacks or whatever else you have handy to run the axle through all the positions while turning the wheels from lock to lock and make sure there is no contact. It's extra work, that's for sure. But this is the kind of professional preparation that will save you from needlessly breaking on the trail. If you don't limit the suspension properly, something will bind and, if it binds, it will eventually break.

Once watched a guy with his brand new killer lift bounce it over a mound, first time out. When the front axle dropped to it's limit, the driveshaft separated. A little thought, preparation and extra work would have prevented it.
Old 08-08-2007 | 01:09 PM
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yeah... you are being a smartass, but I new that was going to bite me in the rear...

I was able to duplicate it and its hitting the fender on a full turn which explains why I did not catch it sooner. I need about .5 inch of additional clearance. The jeep is resting on the bumpstops and the tire's lugs are just catching the edge of the fender which explains the major rattle. One hocky puck should fix my problem. I don't want to mimimize my travel more than I have to. I plan on fixing this next week when I add the reverse shackle to my son's jeep.

I like the idea of taking out the coils to test it just to make sure it's sufficient.

Last edited by 2climbbig; 08-08-2007 at 01:22 PM.
Old 08-08-2007 | 03:13 PM
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Originally Posted by 2climbbig
yeah... you are being a smartass, but I new that was going to bite me in the rear...

I was able to duplicate it and its hitting the fender on a full turn which explains why I did not catch it sooner. I need about .5 inch of additional clearance. The jeep is resting on the bumpstops and the tire's lugs are just catching the edge of the fender which explains the major rattle. One hocky puck should fix my problem. I don't want to mimimize my travel more than I have to. I plan on fixing this next week when I add the reverse shackle to my son's jeep.

I like the idea of taking out the coils to test it just to make sure it's sufficient.
https://www.jk-forum.com/forums/jk-talk-26/frdesigns-guide-better-jeep-11681/

Theres the Guide to a Better Jeep
Old 08-08-2007 | 06:53 PM
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Originally Posted by 2climbbig
yeah... you are being a smartass, but I new that was going to bite me in the rear...
Now that we're beyond that...I am assuming that your avatar photo is YOUR Jeep, yes? It also appears to be the same Jeep in a couple of the photos on the Rusty's Offroad website. What's the connection, if you don't mind me asking?
Old 08-09-2007 | 06:51 AM
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No... I have the same model and color, but it's not my jeep. I just like the look from that view.

Last edited by 2climbbig; 08-09-2007 at 06:53 AM.




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