Jubiride Lateral rod bracket

[jdm86gtz]

Car - AE86

motor - 4A

use - Suspension

problem - Identification

occurs/started when -

personal situation -


These for the chassis side I take it, do they lower the mount?

[--Redwork--]

Its used for altering the rear roll center...
And it attaches to the diff...

[jdm86gtz]

Similar to Cusco weld on jobbie so.

[Kid Karola]

Lowers mounting point of the lateral rod like so:

[Sam-Q]

I don't quite understand how this can share a mount with the lower damper mount when the shoulder of the pivot is flush with the edge of the bush? creative idea though

[Kid Karola]

Here's another view to better illustrate.



Sam if you look closely at the inner plate - the hole that goes over the shock mount is larger - hence locates around it. This still allows the shock bush to sit flush. And only requires a slightly longer bolt to account for the addition thickness of the outter plate.

[Sam-Q]

yes I know what you mean now, this is typical of the Japanese approach in that they go so far out of their way to do something to make still a bolt on job.

[stylz]

whats the advantages to this tho?

[pen15]

yes i am also interested

[Kid Karola]

OK See where the panhard-rod (lateral-rod) mounts to on the left? The 3 holes on the bracket allow you to adjust the rear roll center by moving the mounting point down about 25-50-75mm .

Imagine when you lower your car - what happens to the panhard? Firstly it shifts the diff housing further to one side as it moves upward along an arc. Most people will fit an adjustable panhard to remedy this, but this only re-centers the diff.
Secondly the lateral rod is no longer horizontal but points upwards, which adversely effects the rear roll center. By shifting the diff side mount down* can correct the geometry of the panhard which should be horizontal (similarly to fitting an RCA under front struts on lowered macpherson strut to correct geometry of the suspension arms) and hence adjust roll center.

*or the chassis side of the panhard mount up.

If you've driven a very low car without decent rear alignment you'll notice that it feels different turning left to right. As the weight shift loads/unloads the suspension cornering, increasing/decreasing the angle of the lateral rod and hence shifting the diff left/right more than it already is.

Also when a car is excessively low, there is further geometry issues with the std unequal length 4-links, basically trying to twist the diff snout around on its head. "Traction Brackets" help on the lower links, but there is limited space for realigning the shorter top links. Hence equal length 4-links allow them to be closer to parallel, and move together, rather than against each other. This gives better alignment of the diff with the propshaft/transmission. And with fine tuning the length and mounting points on adjustable 4-links, anti-squat and anti-dive characteristics can also be considered, but this is a whole new discussion unto itself.