4 linker question

i reckon,

If you mount the bars straight it will basically be the same as a parallel. You would need to run a panhard to keep you're axle from moving side to side through articulation. Having you uppers angled is what keps it from doing so, a good rule is each bars be 40 degrees off center triangulated. A good rule to figure the length of th top bars is to take the length of your lowers and multiply that times .70, that will be the upper length. if yours are 54" then your uppers would be 37.8" long. These are just a simple rule, but its more of a proper way of making it

I've read & always been told the uppers bars should be longer than the lowers. A 20'' lower = a 24'' upper. Your method would be 14'' uppers?This is with a tri -link!

no, you want your uppers to be between 70%-100% of the length of your uppers. You want atleast a 40* angle on the uppers.

what do you mean 70-100...there has to be a certain percentage so the axle points to the tranny..and the reason for my trailing arms goin to the tranny, was told to do that so i have goof pinion throughout travel.

if your bars are all the same length then the pinion will not change. you may be thinking of a 2 link where the bars are mounted to the axle solid. the longer 2 link bars are the less change you have in pinion angle over the same amount of lift, as oppossed to 2 link bars that are short. for example if you have 54" 2 link bars and you air your truck up 10" your angle will change less than if you had 27" 2 link bars and asir it up 10"

its not gonna work, to keep the rear end centered, you are gonna want you upper bars to be somewhere around 38-45 degrees.

im just gonna get a suspension book cause nobody seems to know, no shit about the longer bar the better pinion, thats why i went to the trans, high lift with very little pinion change, everywhere i asked i get a different answer for how the traingulated upper bars should be

Originally posted by JFcustoms



im just gonna get a suspension book cause nobody seems to know, no shit about the longer bar the better pinion, thats why i went to the trans, high lift with very little pinion change, everywhere i asked i get a different answer for how the traingulated upper bars should be

read all you want i think youll find that the only type of rear suspension in which the pinion changes less depending only on the length of the the lower bars is a 2 link.

you can have 14" long bars and still have no pinion angle change. its not the length, its about angles.