If you take the Disney bus to Downtown Disney you can pick up the city bus for a very minimal charge to Universal. My daughter took the bus to Seaworld and said it was only about $4 each. She said they ran regularly and that it was a very comfortable ride, was not crowded at all. Hope this helps.
2010 Rockwood 2607
2016 Chevrolet Silverado 2500, Ext Cab