This appears to be a rust on the exterior of the pod. Ezperanza - Tecoma stans - rarely has any disease or insect problem. I've no other possibilities to offer. You are welcome to bring in a sample to the Brazos County Extension office - 2619 Hwy. 21 West, Bryan, if that is possible. Or submit one to our Plant Clinic:
http://plantclinic.tamu.edu/ The lab is on the west campus of Texas A&M, easy to access.