If this just started after installing them then you need to go back and check your work. Outside of that this will require a hands-on inspection. It's tough to guess what's going on without looking at it.
Use this link to find a good shop near you.
https://repairpal.com/repair-shops
Alex
RepairPal Certified shops can diagnose and repair your 2003 Toyota Highlander. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.