Car Issue Help!

Help and Feedback Building Support
#1

Hello,

I made a simple car chassis to add a car body on. However, when I drive the car the back wheels are shaking uncontrollable. Can someone point me in the right direction to fix this? I added the model and a short video clip for reference.

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thanks,

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#2

Maybe try setting massless to true on parts of the car

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#3

I will try that and let you know if it works.

Thanks

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#4
  1. Attachments positioned incorrectly
    Or
  2. Wheels are too light
3 Likes
#5

Thanks for the tip, I will try to correct the issues and let you know if it works. I’m not home now.

#6

from what i know, roblox messed up the psyhics for ac6 chassis
idk if this issue applies here but just letting u know

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the wheels shake uncontrollably aswell on ac6 chassis, but changing the customsuspensiondensity to 1 stablizes it.

idk if it helps, but just gonna let u know

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#7

Thanks for the advise, I will try your solution tomorrow and let you know if it worked.

#8

Forgot to mention that I am not using A-chassis.

#9

The attachments and the hinge constraints are exactly positioned as the front wheels. I turned off cancollide on the chassis and the wheels are not bouncing as much.

#10

Unfortunately , setting massless to true did not solve my issue.

#11

no no no, im just telling you roblox messed up the physics for vehicles.

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#12

As @grimmerschool2 said, your Attachments do not look like they are aligned.

In your Model tab click on Show Constraints.
It’ll give you a visual representation of where the Attachments are, and if you click on the HingeConstraint (the brown flat cylinder) it will show you if the Position and Orientation of the Attachments is different.

All your wheels should have the HingeConstraint Attachment at Position 0,0,0 (not the WorldPosition) so the wheel spins around the middle with no offset.

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#13

The attachments seemed like they are aligned correctly to me. But, I will check the alignment again and change the world positions for the wheels to confirm if these solutions will work.

#14

The Show Constraints button is one of the handiest tools for working with Constraints.

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#15

I agree, i haven’t had the time to mess with the car yet. Hopefully, the solution is that simple.

Thanks,

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#16

I’d recommend deleting the constraints and putting on new ones. Make sure that your move increment is set to 1, so that it automatically puts the hinge constraint in the middle of the wheel.

ALSO, you can try adding no collide constraints between the main body and the wheels

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