I installed a PSC Power steering pump last month and that ended up having a little more oomph than the Durango steering box could handle and ended up leaking in the same place yours is. I have learned years ago working on my Dodge Rams that the steering boxes you get from " any " of the local parts places are hit or miss as to if you get one that works right and lasts . I cured tha Dodge steering box issues with a PSC steeing box ( price dropped lately from 349 to $279.) so I just installed the PSC in my TJ . You will find when it comes to steering gear you usually get what you pay for in relation a new OEM box or a PSC .
05 TJ Rubicon 4.88s ,3&2" BDS, 1.25" JKS BL Bilstein 5100, Currie Currectlync , Savvy arms/Metalcloak Duroflex joints, 33"Cooper STT's, Mc front Track Bar