DIFF Fluid Change

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BlackSapphireZ
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DIFF Fluid Change

Post by BlackSapphireZ » Fri Sep 28, 2007 5:22 pm

THIS DIY IS FOR 2003 Z4 2.5i MANUAL
do this when the car is fairly warm but not burning hot as you will be working near the exhaust. and again, dont' sue me if you make a mistake..and if you are not mechanically inclined, bring it to me i charge a lot ;)

tools required
1)8mm socket wrench
2)jack
3) FOUR jack stands
4)1 quart of 75w-90 oil of your choice...mine being Mobile 1
5)Hand Pump
6)14mm hex socket. there's a DIY for this instead of buying. Honestly though, i forget if its 12 or 14 lol

My way of jacking up all four tires safely.
1)jack driver side only, put the jackstand under the lower control arm.
2)do the same on the passengerside
3)go to the rear, look at the center where the two bars come together and bolts on. Jack from there to a position and place jackstands under the factory jack location on the sides
Image

1)get the car in the air. all 4 tires off, and in somewhat of a leveled position.
Image

2)notice where you jacked up the car in the rear? well there is the silver covering, you need to remove the rear half of it by using 8mm socket wrench

3)when done, look for the FILL plug, it's kind of slanted...unscrew that with the 14mm hex socket.
Image

4)then unscrew the DRAIN plug...oh don't forget to put something underneath to catch the oil and tighten drain plug

5)using the hand pump, pump diff oil in until it oozes out of the fill hole
Image

6)again, take the car down in a safe manner, use a common sense and you are done!
Image

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plowy
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Re: DIFF Fluid Change

Post by plowy » Sun Sep 30, 2007 11:00 pm

Great, so what is the BMW reconmmendation on this change of oil ??

BlackSapphireZ
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Re: DIFF Fluid Change

Post by BlackSapphireZ » Sun Sep 30, 2007 11:42 pm

they tell u it's good for lifetime...i think not
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plowy
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Re: DIFF Fluid Change

Post by plowy » Sun Sep 30, 2007 11:59 pm

BlackSapphireZ wrote:they tell u it's good for lifetime...i think not
Cool, send your Cv to BMW... :lol: :lol:

I tend to agree and for piece of mind i want to do this too.. :wink:

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CUREthe
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Re: DIFF Fluid Change

Post by CUREthe » Sat Sep 21, 2013 11:26 pm

plowy wrote:Great, so what is the BMW reconmmendation on this change of oil ??
x2.
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mad4slalom
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Re: DIFF Fluid Change

Post by mad4slalom » Sun Sep 22, 2013 12:00 am

bmw reccomend a special friction modified diff fluid at 95 quid to keep the lsd quiet, didnt know mobil 1 did a 75 /90, looks like you have a slight oil leak from the diff flange seal too , quite common I think , mine had slight misting pointed out at ins2. :driving:

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Ewazix
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Re: DIFF Fluid Change

Post by Ewazix » Sun Sep 22, 2013 8:32 am

What condition was the old fluid? I assumed it would be a sludge after 10 years but it looks remarkably clean :?
2003 2.5 SE, low miles, Sterling Grey, 108's & Eagles, no stubby here! Unmolested.
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Wondermike
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Re: DIFF Fluid Change

Post by Wondermike » Sun Sep 22, 2013 9:36 am

The thread is 6 years old so the fluid was only 4 years old :)

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Ewazix
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Re: DIFF Fluid Change

Post by Ewazix » Sun Sep 22, 2013 9:44 am

Wondermike wrote:The thread is 6 years old so the fluid was only 4 years old :)
............ :headbang:

:lol:
2003 2.5 SE, low miles, Sterling Grey, 108's & Eagles, no stubby here! Unmolested.
2018 Cooper S Countryman
Old Scooby Forester XT 'Q' car still going strong

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