rear 3 link with panhard ?

[rupert]

ok after searching , reading, having large headaches. I still have questions. I want to design a 3 link with pan hard problem is when it to comes to roll axis . what is acceptable as far as numbers go , i cant seem to get it down. my numbers are as follows.
anti squat. 79%
roll axis angle 14.11
roll centre height 28
what kind of numbers should be looking to obtain for 80 % trail and trailered rig and some rd use to and from the trail.

 

[Lincoln]

You need to get the axle mount of the trackbar high to decrease the roll axis. Look at Goatman's buggy thread to see what I mean.

That is the hardest part to overcome when dealing with links on a XJ. It would be very difficult with a full body XJ to keep the roll axis high and flat and not have interference with the stock floor pan. Also getting a long trackbar to limit the side to side swing.

Keep in mind that the side to side swing of the front axle is not that noticable but when putting it in the rear it is very noticable. When the side opposite of the axle mount moves there isn't any movement but when the side with the axle mount moves up and down the entire axle will swing some. Depending on the angle of the bar and the length will determine how much.

I would like to see your calc for the antisquat. That would be very hard to obtain without raising the axle mounts high or the frame mounts low.

 

[rupert]

i have read that thread numerous times , and it the only thread i have found that goes into any detail about a 3 link with panhard , most are four link or wish bone 3 links. my lower links are at 16 inches from the ground axle centre line basically , 30 inches long 26 inches at frame. running outside of frame parellel to each other. upper is set at 25 inches from ground at axle end and 31 at frame end and 23 inches long . 12 inches over from the center of the diff running parrell with inside frame and through floor at frame end. pan hard is at 31 inches at frame drivers side down to 25 inches at axle total lenght would be around 27 inches and about 2 inches behind axle coming off the back of the upper mount. I think thats the numbers i used i will have too look at the calculator again.

 

[Goatman]

All you can do is get the axle mounts for the upper arm and track bar as high as stuff clearance will allow, then raise the mounting location of the lower arms on the axle. Making the arms longer also helps, but they can only be so long and still fit and not ruin ground clearance.

When you have to package a suspension in an already existing chassis, the goal is to make the suspension geometry as good as you can get it in the available space, rather than trying to approach ideal. Even in buggies when anything can be done, there is still a wide variety of setups.

On yours, any way to get a little more length on the upper arm?