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Power Strokes
6.4 Aftermarket
4 link set up decisions?
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[QUOTE="footlong70, post: 1334568, member: 8456"] Not sure what you guys are considering bump steer. The drag link and track bar which are arching together have nothing to do with 3 or 4 links. So unless you have the drag link and track bar out of parallel than you don't get bump steer. For ride, a 4 link will ride smoother across uneven passenger side to driver side road/terrain because the linkage is not fighting each other trying to twist the axle in opposite directions. Hence why 4links are the professionals choice for offroad articulation. Team a four link with a high end shock absorber and your laughing (especially for lifted trucks that need to counter additional body roll). The other added bonus is a castor angle that stays very close to where it should be throughout travel. Three links are great for higher speed handling/cornering because of the linkage binding from uneven travel side to side. Its like having an additional sway bar. An after market 3 link with heim joints is going to bind even more because it lacks the rubber bushings the stock radius arm use. So on the plus side, body roll will be much more limited and a less aggressive shock and swaybar can be used. As far as castor angle is concerned, its all over the place while the axle is traveling away from static. You being a lowered superduty will be fine with either setup since offroad is not an issue. Personally I prefer 4 links, especially in lifted trucks. Quite happy with mine, makes a significant difference in articulation and ride on uneven roads. But that's apple to oranges for you. [/QUOTE]
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