Thinking of calling for a ride to Uber’s IPO in New York City? Not so fast. Although it is coming, it can take some time.

That’s what the new Uber CEO told employees at a hands-on meeting in San Francisco days after taking the job. Stating it could be within the next 18 to 36 months, Uber’s new CEO Dara Khosrowshahi made the comments at an all-staff meeting in San Francisco where he also emphasized the company culture would have to go, and then be rebuilt.

Khosrowshahi took over the top spot at Uber after leaving Expedia, where he served as CEO since 2015. An Iranian-American, Khosrowshahi is known for running and growing Expedia into the largest online US travel agency.

"This company has to change,” Khosrowshahi said according to a tweet by Uber’s Communication’s Twitter account, “What got us here is not what's going to get us to the next level."

The task of the turning the company’s culture around will not be an easy one for the new CEO. One of the biggest challenges Uber faces with an upcoming IPO will be pleasing a class of workers integral to the day-to-day Uber operation, but most importantly the Uber name: the drivers. Uber has a strained relationship with its drivers due to raising the percentage rate Uber takes on each ride, and over-exaggerating the amount Uber drivers can actually make.

In a lawsuit filed by Michael Hood, a former Uber driver, Hood argued he sometimes made less than minimum wage, and was incorrectly classified as an independent contractor as opposed to an employee. A judge recently allowed the case to go forward as a nationwide class-action.

In an attempt to repair the flawed relationship, Uber met with the SEC over the idea of giving company equity to their drivers, and is awaiting approval on the program.

Khosrowshahi will also be tasked with bringing on many top level executives at Uber, as those positions have been empty due to one controversy or another. After reports of Uber using a special program called Greyball to detect and prevent certain regulators from using the service, Uber quickly terminated the program, but not quick enough before the US Justice Department launched a criminal investigation into Greyball. Uber was also the subject of #deleteUber, a social campaign to delete the app, after accusations of Uber raising their prices, or “price surging,” for those users protesting President Donald Trump’s immigration ban at airports. Moreover, a lawsuit over Uber stealing trade secrets from Google’s elf-driving program, Waymo, is heating up as it makes its way through the courts.

However, despite the investigations and downfalls, Uber has amassed a near $70 billion valuation, and investors are starting to believe an IPO is just a mere 18 months away.

Bradley Tusk, an Uber investor since 2011, says that if Khosrowshahi can correct the stained culture throughout the entire ride-hailing company, cut its losses with competitors, and put his previous Expedia experience to work at Uber, then Uber will be in a better shape for an IPO. He also pointed out that Uber can be pushed to go for an IPO if its largest US competitor, Lyft, goes public. Scott Solombrino, co-founder of the National Limousine Association says, “Lyft has some smart investors; they could potentially surpass Uber and crush them.”

Although Lyft only operates in approximately 300 cities in the United States, while Uber is in approximately 600 worldwide, a Lyft IPO would steal a lot of attention in the ride-hailing industry.

But Solombrino says he’s placing his bets on Uber - assuming that the appropriate measures of regulation are taken within the next few months. “I believe that under the leadership of Dara, who has the capacity to turn the company around, Uber can definitely shape up.”

On the internal side, an IPO can also change how an Uber employee can cash out, and sell stock in the company. As with other privately held companies, employees are often caught in a bind since quitting would be more of an expense and burden, than profit. Uber is noted for being extreme as they do not even allow their employees to sell their shares to pre-approved secondary markets.