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Power Strokes
6.4 Aftermarket
4 link set up decisions?
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[QUOTE="Layson, post: 1335255, member: 298"] I do like some of what you are saying. But there is way more to this then parallel and same length drag link/track rod relationship. The steering linkage really needs to be at a different spot on the axle/knuckle to make it work correctly on a 4-link. When your axle moves through the suspension cycle it also moves forward, up and over. Where the drag link connects on the axle works great with a radius arm setup. You install a 4-link on there and your axle doesn't go through the same exact motion since the caster hardly changes and that exact point where the drag link connects to the axle is now at a different spot then where it would be on a radius arm setup. It is a slightly different path in the 3D world. When you actually draw this in 3D software you will notice the difference. One other thing that sucks about a 4-link is the lack of caster change. What do you think happens to a front driveline when your front axle droops out. It needs to stay straight out of the axle and only change angle at the transfer case. Then when you droop out your front suspension the driveline will just blow up at the axle end and take out your oil pan, your transfer case and beat the piss out of the bottom of your truck until it falls off. So if you are building your superduty for going offroad you really need to address the front driveline if you run a 4-link. Look that front driveline looks happy with this setup. [ATTACH=full]161055[/ATTACH] Look at POS dodges. They went to a 4-link setup and now what do the trucks come with....it is very similar to a Ford now. Dodge couldn't even get it correct. This is my truck. My track rod is like half the length of my drag link. There is a lot more to the equation then just the drag link/track rod relationship. [ATTACH=full]161056[/ATTACH] [/QUOTE]
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