Any how to's on replacing rear diff oil? which kind do i need? i did a search but not much there:-)

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Old 02-07-2003, 02:26 PM
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Xel
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Default Any how to's on replacing rear diff oil? which kind do i need? i did a search but not much there:-)

i was thinking of Redline 80w140, is it good enough?
Can i check oil level in rear diff, or i have to dump all oil out and fill it up?
How much oil does it need?
Old 02-07-2003, 03:03 PM
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Default Need 17mm allen key. Check plug is on the side; drain plug is on the bottom. 75W90.

Buy a Bentley
Old 02-07-2003, 03:16 PM
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Make sure you get "GL5" oil for the rear diff! Of course "Synthetic" is the best!
Old 02-07-2003, 04:27 PM
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Try 10W30 Synthetic!! Heavy Oil might demage the engine!!! 75W90 LMAO!!!
Old 02-07-2003, 04:37 PM
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Default uh...what?

Xel's got a quattro, and you must drain and fill the rear diff every once in a while...It takes 75w90 GL5 spec gear oil, otherwise the diff wears and breaks.

Xel is a little overzealous though, 80w140 is too thick for the rear end.

Factory fill is synthetic for both the transmission and rear diff. I need to drain and fill both of mine again, its been a few years. Should probably do the A6 and 5kq too.
Old 02-07-2003, 04:51 PM
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I have FWD thats why!!
Old 02-07-2003, 11:41 PM
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Thanks for replays guys, but how much oil should i get (litres/galons)?
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