Hello developers!
I am new at scripting and basic roblox vehicle building, but I am trying to expand my knowledge.
What am I trying to achieve?
I decided to use a basic cylinder wheel system for my train, inspired by the trains in the game ,Subway Testing Remastered" by @Arsentic .
What is the problem?
1. The first problem I encountered was that the parts in each wheel set that hold the hinge constraints , would simply not weld to the parts above it.
2. Upon trying the last method to fix it listed below, the train shaked without control whenever the game was played.
What have you tried?
1. I tried welding the entire train model to a basePart set to canCollide false using the Moon Animator Weld Plugin by @xsixx . The train model was welded as expected but the wheel basePart holding the hingeConstraints was just ignored and not welded.
2 . qPerfectionWeld welded my wheels, making them un-movable.
3 . Used a classic welding plugin and tried making a weld constraint between the basePart of the wheels to the Part above. The wheels remained move-able, but the train started shaking and wouldn’t stop.
Video:
I thank everyone who takes time to respond to this rather long problem. 
EDIT:
Upon conducting a little experiment, I found out that the train only shakes if there are hinge constraints present.
Another Discovery: The Hinge Constraints work perfectly on normal base parts, but start to shake only if they’re welded in some sort of way to my train model.
