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Fixed in 2020.1.X



Found in


Issue ID




[WheelCollider] Suspension generates negative forces on high damper values



Repro steps:

1) Create a new project and import the package I attached
2) Open scene Negative suspension force
3) Run and notice the telemetry data in the Game view
4) Press Enter to give force to the object
5) Notice that F(Which shows WheelHit.force data) becomes negative for a short time
6) Pressing R restarts the position and pressing T enters slowmotion so you can see it a little bit better
7) By changing Vehicle - Huge Damper -> WheelColliders child component Damper value to a lower will stop generating negative force

  1. Resolution Note (fix version 2020.1):

    Fixed in 2020.1.0a15, requires suspensionExpansionLimited be set to true on WheelCollider

Comments (1)

  1. Lex3425

    Apr 25, 2020 19:38

    That is an easy enough fix and like so of the bugs needing to be fixed, a simple setting to true can fix the issue. Glad to know the negative force can be avoided. We always are learning from this site and the fixes that take place to apply to other websites like Reading issues like these and taking into account what the fixes are helping keep everything operating smoothly.

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