Dreams involving loved ones often reflect our feelings and concerns about them or the relationship. In this case, seeing a transformer walking over your wife’s head could symbolize a couple of things:

1. Change and Transformation: Transformers are often associated with change and adaptability. This may indicate that you perceive some changes happening in your wife’s life or in your relationship. It could represent your worries or thoughts about how these changes may affect her or your dynamic together.
2. Protection and Vulnerability: The fact that the transformer is walking over her head could suggest feelings of protectiveness. You might be feeling a need to safeguard her from external influences or stressors that you perceive as overwhelming.
3. Conflict or Tension: If the transformer feels menacing or disruptive in your dream, it might indicate underlying tensions or unresolved issues in your relationship. It could be worth reflecting on any recent conflicts or stressors that might be affecting both of you.

Consider how you felt during the dream and any current situations in your life that may relate. Engaging in open communication with your wife about any changes or concerns may help alleviate any anxiety reflected in your dream.