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Old 12-06-2012, 04:26 PM
awdrev awdrev is offline
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Location: Maryland
Join Date: Dec 2012
Posts: 82
Mein Auto: 2004 BMW X3 3.0 Auto Tran
Originally Posted by x3brian View Post
There is only one plug on the rear diff. It's for both drain and fill. What I do is remove the spare tire, pull the drain plug and then jack the front of the car up. I use my pump to get what's left out of there. I then refill with redline 75w90.

The front diff has two plugs. I bought 3 quarts for front and rear and used about 1 3/4 quarts between the two. I definitely wouldn't pay a shop if you were able to change xfer case fluid.

For the cooling system it takes about 10 quarts so you need two gallons. Also not hard to just need about 4 gallons of distilled water and to find the block drain.
Yea that's gonna be a lot of work for the time being... I'll have a shop do that and the front... I have heard of Red Line but I'm just getting all OEM fluids from the dealer.

My next, I guess "slight concern", is that humming sound. I do not think it's the wheel bearing, it increases and decreases with the touch of the pedal so I am thinking that the rear diff needs to be flushed or the "guibo" issue... ugh, but I can't take care of any of that for like a month. It's just gonna be like for that a 2-3....
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