New build & clutch slipping after glasshouse trip

[Jdugg27]

Hey guys just got my patrol back this week it was converted from a 3L to a TD42 Factory T Blacktop (2001 GU Manual) with a few goodies. One of those goodies is the HD NPC Clutch.
Today I was out at Glass House Mountains having a play, It wasn't my intention but I ended up slipping into a bog hole and I believe the box would have been mostly submerged for a good few minutes. I continued 4x4ing (away from bogholes) for probably 3 hours having a blast with no issues at all. It wasn't until going back to 2wd and jumping back onto the roads that I realized what feels to be the clutch slipping. It doesn't really slip in 1st but if you give it a bootfull in any other gear it just starts slipping, it catches back on pretty fast but obviously it's not right. Just wanted to hear peoples thoughts and other possibilities. Cheers