>>28579707
showing more clearly what's different here
the car on the bottom is the original with a normal copypaste AC-compatible lra.
there's nothing really wrong with this except
>the panhard rod is perpendicular to the axle, so it limits suspension travel
>the three-trailing arm design doesn't control the axle very well in extremes, when the car's body rolls and pressure is put on the rear axle in a turn by accelerating, the whole rear axle yaws slightly, causing unpredictable handling and weird torque reactions.
i think that is because the middle link is acting like the driveshaft, and the axle pivots around it in extremes. the panhard rod isn't really doing its job here, either, since AI can't model it properly anyway.

the car on the top has my slop-free ai slop-axle, based on the geometry actual E-body 4-link rear suspension with some changes for AC's sake. note the panhard rod is asymmetrical at rest, allowing for more upward travel on compression. the double trailing arms now control the axle's roll without also acting as a pivot, so in cornering the axle stays straight on and the car no longer suddenly snaps outwards on acceleration

in the front only the upper knuckle joint was moved inward, for slightly more accurate steering geometry.