Ok, so I changed my diff fluid today for the first time. I'm just over 500 miles since the gear swap and it was time.
The good news -- the fluid was not milky at all from what I could tell. Not that I've done any really deep water trails, but I've been a bit puckered a couple of times and figured I'd taken on a little H2O at least.
The bad news -- I cannot for the life of me figure out how much fluid to put into these diffs.
First, the owner's manual does not state a capacity from what I could tell. If it does, then someone please tell me the page number.
Second, I searched here and found this
thread where Phil states 2.75 pts front, 4.75 pts rear
I started with the rear and I had it lifted off the ground on jack stands 'cause I figured I'd be able to give it a tad bit more that way. Well, I got just less than 2 quarts (4 pints) in it before it started seeping out the fill hole.
On the front, I put what seemed like 1.5 quarts in it and it was still not seeping out the fill hole. I stopped and drove home. On the way, I called Aaron @ No Excuses who did the gear swap and front axle install. I asked him how he did it and he basically told me he stuck his finger in the fill hole and felt the level of the oil until it was level with the bottom of the axle tubes.
My first question, what's the small plug for in the Dynatrac axle below the fill plug? I was under the impression that it's to be pulled and when the fluid comes out that hole it's full. Is that right?
Second question, is 4.75 pints a good capacity for the stock rear (stock cover, too).
BTW, the lube locker for the rear was AWESOME. Too bad they don't make them for the Pro Rock 44... do they?