Tag: triangulated four link

Dear Welder Series – triangulated upper bar location

Dear Welder Series…
I am researching the install of your Triangulated Four Link on a 57 Pontiac. Do the rear mounts of the upper bars need to be on top of the axle tube? I noticed, even in the pictures of some installs on this site, that some rear upper bar mounts are on the FRONT of the axle tube. Is there a problem mounting them in front of the tube. I am not sure, in my case, I have the room to mount them on top without cutting up the floor.

Your input would be greatly appreciated.

Dear Writer…
Putting the upper bars on top of the axle tubes gives better leverage advantage than on the front of the tube. The bars can also be longer than with the front mounting position. A downside is that the bar will mount 2 – 3″ higher than with the front-of tube position and this can cause floor interference.

Dear Welder Series… Triangulated four link upper bar angle?

Dear Welder Series…
Hi Paul I am in the middle of installing one of your triangulated four links. How much angle do I need on the upper part. (angle from frame rail to rear housing if looking from top). If I have to shorten the upper bars what would you suggest the min. length be? Thanks

Dear Derek…
Derek, the upper bar frame bracket is designed to mount the bar at 27 degrees off of the frame. It might be hard to reduce this angle very much and still put a wrench on the nut, if the nut will even go on. Another option might be to mount the axle end of the upper bars just inside the frame rails and angle them towards the frame centerline. Then add a new crossmember and mount the frame brackets to it. This way the bars can stay at their original length. As the bars get shorter, the pinion angle changes more dramatically as the suspension works. I hope this helps.
Paul

Dear Welder Series… 1969 F100 Four Link Install Question

Dear Welder Series…
I recently purchased a triangulated 4 link universal kit. I’m putting it in my 69 F100 swb. I have a couple ?s. If the horizontal angles on the upper and lower bars are the same will it have adverse effects if the sitting ride height angles are at 10 deg higher on the front? I’m thinking of raising the front frame mounts up to 10 deg so they won’t be so close to the ground. Also, is there an optimum angle for the triangle? As in looking down on it. I’m pretty close to the angle on the upper frame brackets but was wondering if any +/- is OK?

Dear Kevin…
Kevin, a 10 degree angle on the bars would put the front about 4-1/4″ higher than the rear. This would cause the rear end to “walk” as the truck leans in a corner. This “walking” will make the truck steer from the back end and could be dangerous. I’m o.k. with the front of the bar about 1″ higher than the rear. The angle of the upper bars relative to frame center line can be changed slightly. I don’t have a maximum spec to give you because we haven’t tried to see when it becomes unsafe. Thanks for these questions.
Paul Horton

Dear Welder Series… triangulated four link angle question

Dear Welder Series…
Hi Paul I am in the middle of installing one of your triangulated four links. How much angle do I need on the upper part? (angle from frame rail to rear housing if looking from top). If I have to shorten the upper bars what would you suggest the min. length be? Thanks

Dear Derek…
Derek, the upper bar frame bracket is designed to mount the bar at 27 degrees off of the frame. It might be hard to reduce this angle very much and still put a wrench on the nut, if the nut will even go on. Another option might be to mount the axle end of the upper bars just inside the frame rails and angle them towards the frame centerline. Then add a new crossmember and mount the frame brackets to it. This way the bars can stay at their original length. As the bars get shorter, the pinion angle changes more dramatically as the suspension works.

I hope this helps.

Paul