Roblox raycast jeep only stable on 60 fps

im making a jeep based game where you play obbies but you are on a jeep but my problem is the jeep is only stable on 60 fps making it unstable for others fps and especially mobile players I use the jeep model

1 I figured out its the wheels-thruster doing all this and breaking the jeep when the client is not on 60 fps

2 I figured out also I need delta time for the run service

local function UpdateThruster(thruster)
   --Make sure we have a bodythrust to move the wheel
   local bodyThrust = thruster:FindFirstChild("BodyThrust")
   if not bodyThrust then
   	bodyThrust = Instance.new("BodyThrust", thruster)
   end
   --Do some raycasting to get the height of the wheel
   local hit, position = Raycast.new(thruster.Position, thruster.CFrame:vectorToWorldSpace(Vector3.new(0, -1, 0)) * stats.Height.Value)
   local thrusterHeight = (position - thruster.Position).magnitude
   if hit and hit.CanCollide then
   	--If we're on the ground, apply some forces to push the wheel up
   	bodyThrust.force = Vector3.new(0, ((stats.Height.Value - thrusterHeight)^2) * (force / stats.Height.Value^2), 0)
   	local thrusterDamping = thruster.CFrame:toObjectSpace(CFrame.new(thruster.Velocity + thruster.Position)).p * damping
   	bodyThrust.force = bodyThrust.force - Vector3.new(0, thrusterDamping.Y, 0)
   else
   	bodyThrust.force = Vector3.new(0, 0, 0)
   end
   
   --Wheels
   local wheelWeld = thruster:FindFirstChild("WheelWeld")
   if wheelWeld then
   	wheelWeld.C0 = CFrame.new(0, -math.min(thrusterHeight, stats.Height.Value * 0.8) + (wheelWeld.Part1.Size.Y / 2), 0)
   	-- Wheel turning
   	local offset = car.Chassis.CFrame:inverse() * thruster.CFrame
   	local speed = car.Chassis.CFrame:vectorToObjectSpace(car.Chassis.Velocity)
   	if offset.Z < 0 then
   		local direction = 1
   		if speed.Z > 0 then
   			direction = -1
   		end
   		wheelWeld.C0 = wheelWeld.C0 * CFrame.Angles(0, (car.Chassis.RotVelocity.Y / 2) * direction, 0)
   	end
   	wheelWeld.C0 = wheelWeld.C0 * CFrame.Angles(rotation, 0, 0)
   end
end