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  1. #1
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    Audi S3 Gearbox oil and rear diff ?

    Hi guys and girls,
    Im new to this and own a Audi s3 I need to do know
    what oil does the geabox use ?, any links to what best oil to buy and how much would i need ?
    And does the front diff use the shares the same oil with the gearbox ?

    Allso what oil does the rear diff use aswell and how much does it use ?


    All help would be great and any links to where to buy the oil from good oil,



    Thanks

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  3. #2
    beanoir's Avatar
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    Quite a few useful threads on this, but have a read of this one:

    6 speed 4WD gearbox and front diff oil change

    and this one:

    Replacing diff oil & gearbox/transmission oil tomorrow

    The oil for the front and rear diff is the same grade of course, the front diff feeds the gearbox. The procedure for doing it, and the types of oils are all in the thread.

    Have fun!
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  4. #3
    colicabcadam
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    i used some redline mt90 for mine

    rear diff will take about a litre, gearbox and front diff about 2.8 litres............ an easy job if the car is in the air.

  5. #4
    vrbob's Avatar
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    I went on Opie Oils website put in the make and model of my car and got the oil they reccomend which was castrol syntrax

    Castrol Universal 75w-90 semi-synthetic gear oil

    it was the cheapest place i found it too and as mentioned above you need 3 litres as the gearbox and diff takes about 2.6l

    Oh and if your car is like mine the gearbox plug and filler plug wire an annoying security spline fitting so had to buy one off ebay

    Sealey Security XZN-Spline Socket Bit M16 1/2in Sq Dri | eBay
    Last edited by vrbob; 6th September 2011 at 12:08.
    Audi S3 8L BAM 225 2002 - Ming Blue : Silver Heated Leather, Armrest, RNS-E - Bose, Alloy Mirrors, 18" RSTT`s, Sunroof, Cruise, AutoDim Mirror & Usual S3 Extras.
    Mods : Badger 5 Stg 2 Custom Map, FMIC, 3" DP & 200 Cell Cat, 007P, Jetex Filter & 80mm TIP & Heatshield, Complete LED Kit, Gen VW Aero Wipers, Full Powerflex Kit, R32 RARB, AP Shocks & Springs, 15mm Front & 20mm Rear Spacers, BB Uprated Actuator,
    N249 Delete & Catch Can, AP TVR 4Pot Brakes & DS2500`s, Sachs Carbon/Kevlar Clutch

  6. #5
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    Post Audi S3 Gearbox oil and rear diff ?

    Thanks guys ! for the infor and help,

    Ok now im bit clued up about the oils and how much, I have a good jack and stands can i still change my gearbox oil, and the Rear diff on the jack and stands, What other tools would i need to do the job for the gearbox oil and the read diff .
    Sealey Security XZN-Spline Socket Bit M16 1/2in Sq Dri | eBay

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    hanks

  7. #6
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    Ok thanks Guys whats other tools would i need to gearbox oil change and the rear diff oil change I have a very good jack and 2 stands can this still be done ?.

    All help would be great as im new to the Audi s3


    Kind regards
    Last edited by Daniel Thomson; 6th September 2011 at 14:56.

  8. #7
    colicabcadam
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    sorry - mistake - rear diff takes about 1.6 as above

    basically 5 litres did the lot with some spare, make sure you get gl4 for the gearbox as gl5 can damage the brass bits on the gearbox, you can use gl5 in the rear diff but i did not bother.

  9. #8
    colicabcadam
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    i'd also recommend you get a syringe and tube as it's virtually impossible to do it without one!

  10. #9
    vrbob's Avatar
    Thats no Moon, Thats a space station!

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    when i did it i jacked the car up on 2 jacks and then undid the filler plug first (to make sure i could as didnt want to empty it out and not be able to fill it up) i then undid the bottom plug and let it drain. as it was draining i let the car down so it was level to try and get as much of the old stuff out as possible.

    When filling i did it with the car on the ground my dad helped as i guided a long pipe in the filler hole he had the oil attached at the other end of the pipe. I got about 2 litres in and then went for a 5 min drive and then got another 500ml in as this is when it started to come out of the filler hole.
    Audi S3 8L BAM 225 2002 - Ming Blue : Silver Heated Leather, Armrest, RNS-E - Bose, Alloy Mirrors, 18" RSTT`s, Sunroof, Cruise, AutoDim Mirror & Usual S3 Extras.
    Mods : Badger 5 Stg 2 Custom Map, FMIC, 3" DP & 200 Cell Cat, 007P, Jetex Filter & 80mm TIP & Heatshield, Complete LED Kit, Gen VW Aero Wipers, Full Powerflex Kit, R32 RARB, AP Shocks & Springs, 15mm Front & 20mm Rear Spacers, BB Uprated Actuator,
    N249 Delete & Catch Can, AP TVR 4Pot Brakes & DS2500`s, Sachs Carbon/Kevlar Clutch

  11. #10
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    Thanks guys for the replys, Im a bit confused opie oils said
    75w-90w rear diff - 1 Liters ?
    75w-80w gearbox oil inch the front diff - 3 Liters?
    5w-40w Engine oil 4.5 Liters ?

    Then other people say different can someone correct this please as i need to order new oil tomoro,
    So when the hole fills up with oil and it comes out, I just stop and put the nut back onto the gearbox ?


    Cheers guys

  12. #11
    vrbob's Avatar
    Thats no Moon, Thats a space station!

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    i bought mobil 1 new life 0w 40 for the engine as you need 4.5 litres and it comes in a 5l can.

    I got 3 litres of the castrol i linked to before 75w 90 for the gearbox and diff as its all in 1.

    if you order over £50 from opie oils its free P+P

    When filling the gearbox after emptying it all out get about 2l in and then put the plug in go for a drive round the block as you need it to fill the diff then come back and take the plug out and get as much more in as you can till it starts to dribble out of the fill hole and then put the plug in.
    Audi S3 8L BAM 225 2002 - Ming Blue : Silver Heated Leather, Armrest, RNS-E - Bose, Alloy Mirrors, 18" RSTT`s, Sunroof, Cruise, AutoDim Mirror & Usual S3 Extras.
    Mods : Badger 5 Stg 2 Custom Map, FMIC, 3" DP & 200 Cell Cat, 007P, Jetex Filter & 80mm TIP & Heatshield, Complete LED Kit, Gen VW Aero Wipers, Full Powerflex Kit, R32 RARB, AP Shocks & Springs, 15mm Front & 20mm Rear Spacers, BB Uprated Actuator,
    N249 Delete & Catch Can, AP TVR 4Pot Brakes & DS2500`s, Sachs Carbon/Kevlar Clutch

  13. #12
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    anyone ?

  14. #13
    1st Gear

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    Technically there is a manufacturer specified difference in weights front 75w90 to rear 75w80 so technically opie is correct. Although your 10+ year old diff and all gears for that matter will benefit from having the slightly thicker 90 weight version anyway. After much research and deliberation I went for the cheapest fully synthetic 75w90 oil i could get my hands on. As you car will benefit more from mulitple changes in its lifetime than splashing out on some overpriced overrated oil as a once off. I changed front and rear for £40 with this, I challenge anyone to justify a better argument. Total Transmission FE 75W90 Manual Gear Box Oil 1 Litre | Gear Box Oil
    A3 PD130 TDI Quattro - the discerning mans choice
    (or as I like to think of it the rarer more exclusive S3 derv edition)

  15. #14
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    thanks for the info now i understand it now,
    So how much oil would i need for the rear diff people say 1L some say 1.6 L ?

  16. #15
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    Hi Dave ,
    When i changed my rear diff oil i was told it would only need 1 ltr which i bought genuine from audi . However on draining i kept all of the old oil i found it was more like 1.2 ltrs . So ended up topping up with some of the old oil , which even after 75k was still pretty golden . Hope this helps ,

    Ant

  17. #16
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    I measured the oil I took out of the rear diff and it was 1.2 litres.

    HELP: Rear diff oil quantity

  18. #17
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    Ok thanks, why people using using 0w-40 when opie oils say to use 5-40w ?
    whats the best grade to use

    My s3 has 43,000 miles


    thanks

  19. #18
    colicabcadam
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    my fluid values are as follows

    Engine - Castrol Edge 5w30 - 1 x 4l 1 x 1l (with some spare) - £50
    Gearbox / front diff - Redline MT90 GL4 75w90 - 3 x 1qt (some spare) - £60
    Rear Diff - Redline MT90 GL4 75w90 - 1 x 1qt + spare from above - £20
    Haldex - Audi specifiic - 375ml if i can remember correct (basically the whole tube of what they give you) - £20
    Brake / Clutch Fluid - Motul 600 - 2 x 500ml (from an empty brake and clutch system) - £30
    Coolant - Whatever - 1 x 5l - £10
    Power steering - Audi specific - 1 x 1l - £11

    qt is american it's about 940ml,

    0w40 vs 5w40 = depends on the country you live in, you'd have to do some reading online, but bascally it's how think the oil is when cold or something

    with the gear box, if you actually lift it a little on one side, you can get away with driving it around and refilling it
    Last edited by colicabcadam; 8th September 2011 at 14:03. Reason: typo

  20. #19
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    Im going to use 75-90 for the gearbox and for the rear diff do you think that is ok ?

  21. #20
    Gops's Avatar
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    I was always told that 5-30 was ok for the s3? So it's 5-40?
    Quote Originally Posted by <tuffty/> View Post
    its either mapped or broken...

  22. #21
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    5-40 is the manufacturer recommended spec. you can use lower viscosities like 5-30 and 0-40 and prob get away with it if you have a tight engine. but most of these engines are nearing or way past 100k, so unless you want to have to monitor and top up the oil between changes which you will enevitably have to do running thin oil, then stick with the recommended stuff. The cons of running thin oil on a daily driver outweigh the pros.
    A3 PD130 TDI Quattro - the discerning mans choice
    (or as I like to think of it the rarer more exclusive S3 derv edition)

 

 

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