Im using a handling line for two vehicles and only one rolls when I try to turn? The other is just fine.
No two GTA V vehicles are created equal, so it's entirely normal for two different vehicles that share the same 'handling.meta' data to have different in-game handling. Sometimes vastly different. That's just the way it is. Some vehicles can share the same handling & work no problem, but their in-game handling will almost never be identical.