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Old 04-17-2019, 06:19 PM   #1 (permalink)
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3-link question - Need bend in top link

Planning for my 4WU 3-link project, and am pretty sure I'm going to need to top link to have a bend in it to miss the exhaust. (1st gen 4Runner with Downey headers on a 3.0, and passenger side collector cut very short and exhaust routed inboard and down. Passenger's side top link on 65" Diamond axle.)

I'm not wild about this idea, and will avoid it if I can, but what's the best way of going about this if I must? The bend itself isn't the issue, of course, but I'm concerned about making it strong. I found one thread here where a bent top link failed, and I'd like to avoid that.

Mark
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Last edited by ScaldedDog; 04-17-2019 at 06:20 PM.
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Old 04-17-2019, 06:52 PM   #2 (permalink)
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can you fit a larger diameter tube in there? easiest way to add some beef to the bend.

or if you are feeling baller, fill the upper with a piece of aluminuim and then bend it.
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Old 04-17-2019, 07:25 PM   #3 (permalink)
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Cut and move whatever is in the way. / thread

In my opinion running a bent upper link on a 3 link setup is asking for trouble.
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Old 04-17-2019, 07:38 PM   #4 (permalink)
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Cut and move whatever is in the way. / thread

In my opinion running a bent upper link on a 3 link setup is asking for trouble.
Trust me..take this advise! Unless its just a cruiser. If not and you drive like me, dont learn the hard way like me. Mine let go when I was playing rock bouncer. It took out both airshocks, rolled the axle which took out the fittings on my steering ram. Essentially had an axle dangling under the truck in a really shitty spot. Had to leave it overnight 2 hours from home tied to a tree so it wouldn't yard sale down the hill. The recovery was just as fun lol
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Old 04-17-2019, 07:42 PM   #5 (permalink)
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Trust me..take this advise! Unless its just a cruiser. If not and you drive like me, dont learn the hard way like me. Mine let go when I was playing rock bouncer. It took out both airshocks, rolled the axle which took out the fittings on my steering ram. Essentially had an axle dangling under the truck in a really shitty spot. Had to leave it overnight 2 hours from home tied to a tree so it wouldn't yard sale down the hill. The recovery was just as fun lol
This is what I was afraid of...

I'll just need to get the mounts tacked up and see what hits, but I'm still a month out from receiving them. I'll resurrect this thread with pics if need be.

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Old 04-26-2019, 01:44 PM   #6 (permalink)
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Originally Posted by ScaldedDog View Post
This is what I was afraid of...

I'll just need to get the mounts tacked up and see what hits, but I'm still a month out from receiving them. I'll resurrect this thread with pics if need be.

Mark

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For sure don't bend it.



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Old 05-05-2019, 05:41 AM   #7 (permalink)
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Build it heavy enough and you can absolutely bend it to clear.

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Old 05-14-2019, 11:37 AM   #8 (permalink)
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I think if your link geometry is pretty good and you don't have a ton of stress or binding on the upper link, a slight bend in thick wall tubing would probably be okay as long as you're not jumping it and being a complete idiot. At the same time who wouldn't prefer a straight link? But at what cost?
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Old 05-14-2019, 06:55 PM   #9 (permalink)
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make a plate link like a trailing arm
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Old 05-20-2019, 07:27 PM   #10 (permalink)
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My bent upper link has been holding my rig up in the garage no problem for years...


2" OD x .250 wall DOM with a spine on the back side of the bend. If this thing bends ill probably have much bigger problems.


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Old 05-21-2019, 06:19 AM   #11 (permalink)
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That is the proper way to reinforce a bend. Ideally it should taper to the end of the long side also, to avoid a stress concentration where it ends.
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