Tensions are mounting between Pacific Investment Management Co (PIMCO) co-founder and co-chief investment officer Bill Gross and outgoing CEO Mohamed El-Erian. There have been rumors that the two hadn’t been getting along for some time, which the news of El-Erian’s departure later this month seemed to confirm. Then a Wall Street Journal article came out after someone at PIMCO decided to share a lot of dirt about the infighting and goings-on at the world’s biggest bond fund. Whoever talked knew details about Gross’s behavior at meetings, approximate pay, and interactions with other employees, so El-Erian is one of the natural…