1998XJsport

Hello. I have a 98 Cherokee Sport 2 Dr. I have a transmission leak coming from what appears to be the line that leads into the transmission cooler on the drivers side. Has anyone replaced this and if so how hard is it?

Second question, I have a noise coming from the rear diff. I changed the fluids to synthetic recently (no metal shaving/nothing out of the ordinary in the old fluid) gears appear to be fine etc. Was wondering if it's a wheel bearing issue or something else? Planning on taking it on a road trip shortly and that humming noise will drive me nuts after 8 hours of driving.

Anyone know where I can get some accessories for it? Like bull bars/smoked side markers/fender flares for a 2 dr etc.

Thanks for any help!