After evicting Sloan and his partner Corey Watts, the driver allegedly said "I take gays but they don't normally do this."
Toronto native Sloan said:
"I've never had any homophobic stuff happen to me so I was caught off guard. You don't expect it to happen in one of the world's biggest cities. I wanted to understand what he was thinking so I asked the driver: 'Would you do the same thing if it was a guy and a girl?'"
In a statement, an Uber spokesperson said:
“Uber does not tolerate any form of discrimination either by our partner drivers or towards our partner drivers.
"We opened an investigation from the moment we learned of this unacceptable incident and have been in contact with the rider to extended our sincere apologies and get further information."
The couple were charged for their journey but later refunded.
The cab driver has been suspended while the incident is under investigation.
Although Watts has received mostly messages of support on Twitter, some of the feedback - including Uber driver @PhDCab - was less than enlightened.
Last April, an Uber drive in Paris, France was fired for refusing to pick up two gay customers.
In July, Uber provided 8 lucky couples spontaneous weddings in San Francisco in celebration of the city's Pride event and marriage equality.
Watch a video of Uber's San Francisco wedding celebration, AFTER THE JUMP...