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  1. #1
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    Exclamation The truth about transmission oil?

    Right, I'm massively confused.

    I've been searching on here for AGES looking for recommendations for transmission/ gearbox oil to go in my 172 Cup. There are literally hundreds of threads on the topic, yet no definitive answers!!

    Anyone know Renaults exact specification and quantity (I assume it's an ELF product with a viscosity of 75W80)?

    I'll go from there thinking about an 'upgraded' solution if I need it...

    However, I've seen recommendations for:

    Elf Tranself NFJ 75W80
    Elf Tranself TRX 75W80

    Elf Tranself NFP 75W80
    Elf Tranself TRJ 75W80

    Castrol EPX 75W80 GL5
    Fuchs TITAN SINTOFLUID 75W80
    Millers Oils EP 75w80 GL5

    Silkolene Syn 5 75W90
    Motul Gear 300 75W90
    (someone mentioned 75W90 "can lead to a baulky shift when hot due to the higher viscosity.")??

    Some have also said the Tranself products are API GL-4, but API GL-5 is better?

    Which is better performing/ longer lasting, or is this subjective?

    Re: quantities - My search also showed that some people recommend using 4 litres, some say 3.5, others 3.1 and some 3?


  2. #2
    ClioSport Club Member
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    Re: The truth about transmission oil?

    Look in the manual for Renault recommendations.
    Last edited by DrR; 03-02-2010 at 18:33.

  3. #3
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    Re: The truth about transmission oil?

    its supposed to be elf 75W80 but costs a fortune, so most use 75W90

  4. #4
    ClioSport Club Member
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    Re: The truth about transmission oil?

    I use the elf stuff think it was 60!!!

  5. #5
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    Re: The truth about transmission oil?

    TRX by the way from memory

  6. #6
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    Re: The truth about transmission oil?

    ^ Just seen a thread where a bloke mentions TRX isn't made any more!*

    See what I mean, confusion at every turn!

    * EDIT: ELF's site seems to back this up - Only NFP and NFJ are listed. NFP (API GL-4+) has "Renault PXX" next to it?
    Last edited by .Ben.; 03-02-2010 at 18:43.

  7. #7
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    Re: The truth about transmission oil?

    You want as thin as possible for a good change.

  8. #8
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    Re: The truth about transmission oil?

    Stick with 75w80 the castrol stuff is more than resonable, the end.

    Quote Originally Posted by _Nero_ View Post
    ^ Just seen a thread where a bloke mentions TRX isn't made any more!

    See what I mean, confusion at every turn!
    Its TRJ they'll supply now, doesn't really matter tbh.

  9. #9
    ClioSport Club Member
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    Re: The truth about transmission oil?

    I use the Castrol GL5 stuff.

    IIRC Sports take 3.1 litres ??

  10. #10
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    Re: The truth about transmission oil?

    I use
    Castrol EPX 75w80 GL5 In my everyday car, 182.

    As an upgrade I use
    Millers CRX 75w90 NT in my trackday 172 cup.

    The Millers was recommended to me by the nice people
    at Quaife, to use in my Renault box fitted with there Diff .

  11. #11
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    Re: The truth about transmission oil?

    Quote Originally Posted by Andyman View Post
    I use the Castrol GL5 stuff.

    IIRC Sports take 3.1 litres ??
    JC5 box does indeed.

  12. #12
    ClioSport Club Member
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    Re: The truth about transmission oil?

    the ppl at quaife told me to use Silkolene Syn 5 75W90 as its the only quaife approved gearbox oil...

  13. #13
    ClioSport Club Member
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    Re: The truth about transmission oil?

    ELF TRX is exhanged with ELF NFJ 75W80, it is that oil and that oil only. And its NOT expensive. I bought it here in Sweden for less than 10/liter. The NFJ is specially developed for Renault J(xx) boxes among them JC5 thats in your car.

    Imo Castrol doesnt work at all in this box especially in cold weather its hard to get the gears in. From what I heard this box need a special ingredient to increase friction something like the oil used in plate diff boxes. That may explain why the Elf oil works so much better.

    Renault specify the capacity to 3,1liters.

    http://www.lubadmin.com/upload/produ...ang_1/7194.pdf
    Last edited by GodSpeed; 03-02-2010 at 20:15.

  14. #14
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    Re: The truth about transmission oil?

    The guy who rebuilds our box said only use 75/90 GL-5 Part Synthetic.Halfords do it.

  15. #15

    Re: The truth about transmission oil?

    have a read on wiki/etc about gear oil specs - GL5 is the highest (it's related to the anti shear additives, or something), and there are some GL5 oils with more additives than others (technically, 'better')

    never figured out how the TransElf range works - i thought NFJ/etc were the continental equivalents of the TR- range. i think that, the further the last letter in the code is through the alphabet, the higher the oil's spec. i've TRT in mine (a GL5 oil), but TRX is apparently the one it should have

    and you only need 3L; capacity's 3.1L, but it won't all drain
    Last edited by Henry; 03-02-2010 at 23:23.

  16. #16
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    Re: The truth about transmission oil?

    Thanks for the input about shear-ratings Henry. Unfortunately, it appears that ELF's letter-based system may be defunct now (ie - TRX isn't made any more)

    What are the advantages (if any) of using a 75W-90 GL-5 (Silkolene Syn 5 75W90) fluid over a 75W-80 GL-5 (Fuchs TITAN SINTOFLUID 75W80) in a standard 'box? >>>>> It seems the guys recommending this are running highly modified cars?

    From what Henry has said, a synthetic 75W-80 with a GL-5 shear rating (Fuchs) is better than a GL-4 or a GL-4+ (Tranself)?
    Last edited by .Ben.; 03-02-2010 at 23:28. Reason: Responding to Henry's post...

  17. #17
    ClioSport Moderator
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    Re: The truth about transmission oil?

    Interesting thread. Sounds a bit of a minefield to get right spec/right amount...

    D.

  18. #18
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    Re: The truth about transmission oil?

    Fuchs TITAN SINTOFLUID 75W80

    This is what Oilman told me, Bought 4 litres of the stuff, think it's 3.1 litres on a normal drop oil change.

  19. #19
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    Re: The truth about transmission oil?

    Some interesting misconceptions being discussed in this thread - transmission fluids are a complex world, and it's hard to find anyone who knows the right answers (particularly retailers). I develop transmission fluids, and know the specs and what goes into making a good fluid.

    Some quick points to correct - GL-5 is NOT a manual transmission fluid, even though many workshops will use it as such. GL-5 is a specification for axle fluids, requiring high wear protection, but which have no synchros to worry about.

    In an MTF, there is a balance needed between wear protection and synchro performance - and this will be specified by the individual manufacturer in order to meet with the needs of their transmission design and materials.

    To get the best performance from the 182 box, I would first of all recommend getting the closest to the fluid in the handbook (this will be approved against the renault specification) - if you can't get that, then look for the best MTF (NOT a GL-4 or GL-5 necessarily, and I won't suggest brands - but avoid unknowns) in 75W/80 that you can find - an MTF will at least have the right friction modifiers in to maintain the life of your synchros.

    I hope this helps a bit - I'll check in again on this thread if there's anything else I can add. The transmission fluid market is a lot more complex and confusing than engine oil - and the specifications are much more linked to an individual manufacturer (or even transmission) making it very difficult to select the right fluid...

  20. #20
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    Re: The truth about transmission oil?

    ^ So best to stick to a ELF Tranself 75W-80 (GL-4+) product as mentioned in the handbook?

    Dammit!

    Just bought 4 litres of Fuchs TITAN SINTOFLUID 75W80 (A GL-5 fluid ). Opie Oils website states that this is a recommended fluid for use in - amongst others - Renault gearboxes.


    EDIT: From the Wikipedia place:

    • API GL-4, oils for various conditions - light to heavy. They contain up to 4.0% effective antiscuffing additives. Designed for bevel and hypoid gears which have small displacement of axes, the gearboxes of trucks, and axle units. Recommended for non-synchronized gearboxes of US trucks, tractors and buses and for main and other gears of all vehicles. These oils are basic for synchronized gearboxes, especially in Europe.
    • API GL-5, oils for severe conditions. They contain up to 6.5% effective antiscuffing additives. The general application of oils in this class are for hypoid gears having significant displacement of axes. They are recommended as universal oils to all other units of mechanical transmission (except gearboxes). Oils in this class, which have special approval of vehicle manufacturers, can be used in synchronized manual gearboxes only. API GL-5 oils can be used in limited slip differentials if they correspond to the requirements of specification MIL-L-2105D or ZF TE-ML-05. In this case the designation of class will be another, for example API GL-5+ or API GL-5 LS.

    That clears that up, then?

    .
    Last edited by .Ben.; 04-02-2010 at 11:17.

 

 
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