Xjs rear suspension

[Snake2998]

I don't agree. (What to I don't know????)

[GavCob]

Can't post content...?

[GavCob]

3rd time lucky?
Hi,
In UK with LS1 turbo jag suspension.
3.54 PL diff.
My diff is hard mounted to chassis.
I have no radius arms or torque arms etc.
If I mounted to the lower rear wishbone original radius arm pivot outer, to the chassis in line with the lower wishbone inner pivot at an angle 45? Triangle then would this help?
Regards
Gav

[strictlypersonl]

Yes. Keeping the front trailing arm pivot point in line with the lower control arm inner axis is ideal when the differential is solid-mounted.
It would help to know which Jag rear suspension you're using. XK (and the vintage), early XJ, late XJ, etc.

[joyridin']

Yes, but if I am understanding what you say, 45 degrees might be too much of an angle. You might go more like 20 degrees or something a lot smaller so it will not pull the lower control arm to the back during normal up and down travel.

[strictlypersonl]

Geometry-wise, it makes no difference where the front mount is as long as it's on the pivot axis. Forces in the trailing arm increase as the front mount gets closer to the trailing arm. It's all a balancing act, since a very long trailing arm gets unstable in buckling mode.

[GavCob]

Hi, thanks for replies, might even try a photo now!
All I know is it's 3.54 pl in board brakes from a scrap yard

Seen on here either the arm or a watts link setup on the lower wishbone(LCA arm.)
Also saw a photo somewhere the longer the better?
Not quite how I'm going to do it yet but this winter the diff is whining on coasting on off throttle so that's got to come out....
Regards
Gav

[GavCob]

[joyridin']

Here is my set-up. It is long, but works excellent.

[GavCob]

Hi,
Thanks for picture
Any closer pics of linkages? You gone straight to outer fulcrum bolt?
Regards
Gav

[strictlypersonl]

Originally Posted by GavCob

Hi,
Thanks for picture
Any closer pics of linkages? You gone straight to outer fulcrum bolt?
Regards
Gav

That's a leading arm design. It looks like they replaced the lower pivot pin with one that has a clevis mounting end. If you are using a trailing arm, you should be able to use the normal trailing arm bracket on the LCA. (In fact, if they had switched their arms from side to side, they could have done that too.)

[incoming]

I personally think the trailing arms are better for hard acceleration. Better to pull than push?

[joyridin']

Originally Posted by incoming

I personally think the trailing arms are better for hard acceleration. Better to pull than push?

Pull breaks, push bends. Kind of depends on what you are doing.

[joyridin']

Originally Posted by GavCob

Hi,
Thanks for picture
Any closer pics of linkages? You gone straight to outer fulcrum bolt?
Regards
Gav

This was built by Ron Butler. Personally, I would go with something like this, although you may still need a LCA:


https://www.actoncustom.com/products...r-contemporary

[Snake2998]

I am watching this with interest as my Jag suspension needs stabilising under acceleration. Have experienced some "interesting" moments when coming off the throttle too quickly with a tiny bit of steering lock. (Don't do that anymore but would like to be able to)