I just have a quick question to ask because im not entirely sure on the answer. I went mudding yesterday and I got stuck in one part where the entire rear end was under mud/water up to the tailgate. I was only stuck for 5 minutes before I was pulled out but my question is should I change the rear differential fluid? I have heard that mud can get in there if the rear end is submerged but im not sure. BTW ill post up some pictures of it later

 

I dont know about your truck but my '96 has a hose that runs up near the frame to allow air into it. If you burried it that far i'd imagine it could get in. I'd check and see if yours is set up that way and if it went that high. Changing diff. fluid is pretty easy, deiff. themselves not so much. If you think it went above the vent i'd do it, but i'm not real sure, and that's just me

 

Its your call on whether you change it or not....changing fluid is pretty easy but the fluid itself is kinda expensive as its full synthetic. There is a breather on top of the axle, on the driver side of the diff, that has a hose connected to it. If the hose is still connected to this breather, and if you think the other end of the hose (top part) didn't get any water down inside, then you're probably fine. On mine, the hose came off the breather sometime during winter, and I didn't notice until spring and so I changed mine just to be on the safe side.

 

Thanks guys ill check the hose to see if it looks like mud got inside.

 

Real trucks use mud as lubricant

jk

 

Lol if only it were that easy