1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

2.8Q rear diff oil

Discussion in 'A4/S4 forum(B5 Chassis)' started by AndyMac, Jul 16, 2010.

  1. AndyMac
    Offline

    AndyMac Moderator Staff Member Moderator

    Joined:
    Jun 10, 2003
    Messages:
    9,833
    Likes Received:
    31
    [Jul 16, 2010]
    I've noticed a quite a build up of oil on my rear diff, it's not badly leaking, no drips onto the drive or anything, but I'm conscious that it must need a top up. Anyone know how this is done and what fluid to use?
    #1
  2. Ads

    Ads

    [Oct 24, 2014]

  3. S4twiggy
    Offline

    S4twiggy Fully Certified Detailer!!

    Joined:
    Feb 23, 2009
    Messages:
    1,815
    Likes Received:
    9
    [Jul 16, 2010]
    having the same problem with my S4 mate, dont suppose this is hard but mine is so low that i cant get under it and if i jack it up then it prob wont drain properly.
    #2
  4. 205man
    Offline

    205man Active Member

    Joined:
    May 28, 2006
    Messages:
    1,018
    Likes Received:
    4
    [Jul 16, 2010]
    ohhh must be catching , but mines leaking from the front final drive, but goes in next week to have seals done

    according to audi it should be gear oil sae 75w 90 synthetic
    #3
  5. AndyMac
    Offline

    AndyMac Moderator Staff Member Moderator

    Joined:
    Jun 10, 2003
    Messages:
    9,833
    Likes Received:
    31
    [Aug 7, 2010]
    Any pointers on how to top up the rear diff oil?
    #4
  6. phoenixv6quattro
    Offline

    phoenixv6quattro staylowmovefast

    Joined:
    Sep 27, 2009
    Messages:
    1,396
    Likes Received:
    2
    [Aug 8, 2010]
    You need a large type syringe with a flexi hose or something you can pump the fluid up in into the diff with. ITS A BASTARD. All you need is axle oil from audi ref the oil. Big white bottle that says "axle oil" funnily enough.....
    #5
  7. AndyC
    Offline

    AndyC Moderator Staff Member Moderator

    Joined:
    Apr 27, 2003
    Messages:
    710
    Likes Received:
    7
    [Aug 8, 2010]
    easiest way is to take the wheel off, and slide a pipe from the wheel arch to the diff filler.... use a funnel or from the 1 litre bottles...
    #6
  8. AndyMac
    Offline

    AndyMac Moderator Staff Member Moderator

    Joined:
    Jun 10, 2003
    Messages:
    9,833
    Likes Received:
    31
    [Aug 8, 2010]
    That worked a treat, thanks. With the help of my 7 year old son under the car holding the hose in the hole - not very health & safety I know.
    God that gear oil stinks.
    I had to use a 3 foot breaker bar to release the filler plug (after I had returned to Halfords to get a half inch 10mm hex bit for it). The drain plug was no problem, however 1 litre is not enough, so got to top it up with some more tomorrow. The stuff that came out was pretty foul, but lots of it so my worries about it running dry were unfounded.
    Car seems exactly the same so another job well done.
    #7
  9. aragorn
    Online

    aragorn "Stick a V8 in it!" Staff Member Moderator VCDS Map User

    Joined:
    Jan 30, 2008
    Messages:
    15,709
    Likes Received:
    332
    [Aug 8, 2010]
    The diff takes 1.5L, 75w90 Synthetic gear oil.

    Your lucky the fill plug came out lol, both me and mark rounded our fill plugs :(
    #8
  10. AndyMac
    Offline

    AndyMac Moderator Staff Member Moderator

    Joined:
    Jun 10, 2003
    Messages:
    9,833
    Likes Received:
    31
    [Aug 8, 2010]
    Thanks aragorn, I used Castrol Syntrax 75w90. Why do they always sell oil so one is not enough and 2 is too much.
    I was lucky I guess, someone had already graunched it a bit, so I thought it was going to be a problem. Even with 3 foot of leverage it was hard work, a very loud crack when it finally gave up, thought I'd snapped yet another tool! Crazy as it only needs to be semi tight as it's not under any sort of pressure.
    #9
  11. aragorn
    Online

    aragorn "Stick a V8 in it!" Staff Member Moderator VCDS Map User

    Joined:
    Jan 30, 2008
    Messages:
    15,709
    Likes Received:
    332
    [Aug 8, 2010]
    Ye, i suspect its a weird reaction between the ally housing and steel plug.
    #10

Share This Page