As you know... Disney and Universal are competitors.
Universal doesn't provide any transportation to Disney and Disney - to Universal.
You best option is a taxi. You can get a cab right outside of your hotel or you can arrange your transportation in advance and book online. I would recommend Star Trans (link below). They also provide transportation from airport to hotels and resorts.
I also checked if you can use public transport, but, unfortunately, trip planner on Lynks site showed that it will take you more then 3 hours to get from Disney to Universal by bus (plus you have to walk).
Universal Studios and Islands of Adventure are mostly movie/tv based theme parks connected to CityWalk (restaurants/shopping/night clubs)
What kind of transportation?
DIS Boards are very useful in giving information on Disney ,Florida, Orlando and Universal trips all around the world. It has forums so people can write down questions and discuss things together.
Universal Life
You can find cheap Disney world tickets at shades of green as long as someone attending is a military member. Most military bases also offer discounted tickets.Tickets to Disney World are often the 2nd most largest expense on your Disney vacation. There are several reputable Disney authorized ticket discounters. Undercover Tourist is one of those authorized discounters and their prices are always lower than those sold at the parks. MouseSavers is another reputable site and their website has several suggestions of what to look for and what to avoid.There may be several promotion deals for discounts on Disney World tickets, for example buy 4 days get the 5th free. A registered ABTA or ATOL travel agent to see what offers they may have when the trip is booked, or, to check Disney's official website and compare prices there for pre booked and at the gate prices.Try buying your Disney World tickets at tickets2you.com. They have the best deals I've ever seen and are an authorized Disney, Universal, SeaWorld ticket seller!
3365428820
LLAMAS
universal motor
donkeys
cars
carages
They had horses.