This is my script:

local prev  
--weld seat
if(script.Parent.Parent:FindFirstChild("VehicleSeat"))then
local weld = Instance.new("Weld")
			weld.Name = "dd"
			weld.Part0 = script.Parent.Handle
			weld.Part1 = script.Parent.Parent.VehicleSeat
			weld.C0 = script.Parent.Handle.CFrame:inverse() 
			weld.C1 = script.Parent.Parent.VehicleSeat.CFrame:inverse() 
			weld.Parent = script.Parent.Handle
			script.Parent.Parent.VehicleSeat.Anchored = false
	end
--weld models
for i,v in pairs (script.Parent:GetChildren())do
	if(v:IsA("Model"))then
		    if(v.Name == "Hinge")then
			local part = Instance.new("Part")
			part.Size = Vector3.new(.1,.1,.1)
			part.Rotation = v.PrimaryPart.Rotation
			part.Position = v.Wheel.Position
			part.CanCollide = false
			part.Parent = script.Parent
			part.Transparency = 1
			part.Name = "M"
			local weld = Instance.new("Motor6D") 
			weld.Name = "motor"
			weld.MaxVelocity = 0.03
			weld.Part0 = part
			weld.Part1 = v.PrimaryPart 
			weld.Parent = v.PrimaryPart
			for l,m in pairs (v:GetChildren())do
				m.Anchored = false
			if(m.Name ~= "Wheel")then
			local weld = Instance.new("Weld")
			weld.Name = "dd"
			weld.Part0 = m
			weld.Part1 = m.Parent.PrimaryPart
			weld.C0 = m.CFrame:inverse() 
			weld.C1 = m.Parent.PrimaryPart.CFrame:inverse() 
			weld.Parent = m.Parent.PrimaryPart
			end
			end
		    else
		    local weld = Instance.new("Weld") 
			weld.Part0 = v.PrimaryPart
			weld.Part1 = script.Parent.Handle 
			weld.C0 = v.PrimaryPart.CFrame:inverse() 
			weld.C1 = script.Parent.Handle.CFrame:inverse() 
			weld.Parent = v.PrimaryPart
			for l,m in pairs (v:GetChildren())do
			m.Anchored = false
			if(m.Name ~= "Wheel")then
			local weld = Instance.new("Weld")
			weld.Name = "dd"
			weld.Part0 = m
			weld.Part1 = m.Parent.PrimaryPart
			weld.C0 = m.CFrame:inverse() 
			weld.C1 = m.Parent.PrimaryPart.CFrame:inverse() 
			weld.Parent = m.Parent.PrimaryPart
			end
			end
		end
	end
end
--weld parts
local parts = script.Parent:GetChildren()
for i = 1,#parts do 
	if (parts[i].className == "Part" or parts[i].className == "UnionOperation" or parts[i].className == "WedgePart" or parts[i].className == "Seat" or parts[i].className == "VehicleSeat") then 
		if (prev ~= nil and parts[i].Name ~= "Hinge" and parts[i].Name ~= "Hitch")then 
			local weld = Instance.new("Weld") 
			weld.Part0 = prev 
			weld.Part1 = parts[i] 
			weld.C0 = prev.CFrame:inverse() 
			weld.C1 = parts[i].CFrame:inverse() 
			weld.Parent = prev 
		end 
		prev = parts[i] 
	end 
end
--unanchor
for i,v in pairs(script.Parent:GetChildren())do
	if(v.className == "Part" or v.className == "UnionOperation" or v.className == "WedgePart" or v.className == "Seat" or v.className == "VehicleSeat")then
	v.Anchored = false
end
end

But it welds weird and looks like it has been in a car accident. I don't think it is the script because the model welds fine in a map that is just about empty. But when it is in a map that has a lot of terrain, and takes awhile to load, then it welds weird. How can I make it load properly?

Anonymous