I believe I have found the answer.
https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst6500/ios/12-2SX/configuration/guide/book/vtp.html#wp1051097
Interaction Between VTP Version 3 and VTP Version 2 Devices
A VTP version 3 device does not accept configuration from a VTP version 2 (or VTP version 1) device.
Trying to figure out what I am not understanding about how VTP 3 behaves.
On SW1 started a debug sw-vlan vtp packets
Vlans did no sync to SW1 until I changed it
from version 3 to version 2
Note: SW2 and SW4 are 3550’s set to VTP version 2
