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What’s The Best Gearbox Oil For The Dino 246?

Discussion in '206/246' started by 4CamGT, Sep 8, 2019.

  1. 4CamGT

    4CamGT Formula 3
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    My Dino shifts “pretty good” cold or hot but I drive and shift it with great respect and try make deliberate shifts with full clutch action. I can see that second gear, shifting up or down needs to be done with care and skill and not too fast. I never try to rush it. I always make sure when taking off in first gear, that the shifter if fully down in its gate.

    I have no idea what gear oil is in my sump. I’d love to know what you’re using in your Dinos with the pros and cons of what you’ve experimented with and your experiences.
     
  2. cls

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    Similar trans and related problems on the 308. A lot of 308 owners use Redline.
     
  3. dgt

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    I use Redline 75W-90NS which was an improvement over the 2 previous oils used, shifts well. (don’t recall now what the previous oil was though...)
     
  4. ttforcefed

    ttforcefed F1 World Champ
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    fwiw in the F355 redline MTL smooths out some notchiness the 75w-90 doesn't
     
  5. 4CamGT

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    I’ve been reading some posts on F-Chat, especially in the 308 section between NS vs MTL. Seems really to ping pong both ways! I think it needs an oil that “slows” the synchros down. I’d like to hear more actual experiences before deciding which one would be best suited to my gearbox. What about synthetic oil being more leak prone?
     
  6. cls

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    There's also a modification to the 308 gearbox that fixes the 2nd gear cold shift problem (allegedly.) If involves opening or widening an oil passage. I'll see if I can find it.
     
  7. cls

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    In the Ferrarichat archives

    Posted on Wednesday, May 23, 2001 - 3:03 pm:
    There is a "post-engineering" fix for the second gear stick -- it involves drilling a relief passage in the lay shaft recess to allow the oil to plunge away from the rod end. It is easy to do, absolutely does not harm the gear box, and completely eliminates the problem. A how to article first appeared either in a past Forza or Prancing Horse issue -- sorry I can't remember. If you want the details, call Black Horse Motors in LA (adds in Forza), and ask for Carl -- he has done many, and can provide DIY info."
     
  8. 4CamGT

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    Any real experiences with different gearbox lubricants/oils in your Dino?
     
  9. Nuvolari

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    I have experience running different gearbox oils with both the 308 and the Dino

    Dino:
    - Bought the car with Sweepco (a Porsche favorite) and it was ok but nothing exceptional
    - Replaced it for 75W90 NS RedLine with half a bottle of GM LSD Friction Modifier. The difference was considerable with smoother shifts when the box was warm but still very stiff when cold.
    - Re-built the gearbox and went back to the 75W90NS with the LSD additive. Many years passed as the car was in restoration so I cannot comment how the re-build affected things but the car did shift very well when warm but still stiff when cold.
    - After trying RedLine MTL in the 308 with great success I changed it in the Dino and it was immediately better cold. The car now shifts the best it ever has and I never would have believed the difference had I not tried it myself.

    308:
    - Bought the car with Agip Sint 2000 gear oil (as per dealer service records). Much too slick for the synchros so care had to be taken to avoid crunching gears
    - Changed to conventional gear oil and the shifting was better warm but very stiff cold
    - Changed to RedLine 75W90 NS with GM LSD Friction Modifier and it worked very well until I read about RedLine MTL
    - Changed to RedLine MTL and the difference was considerable. Much better cold shifting and very smooth at all temperatures.

    Both the 308 and Dino have very similar gearboxes so I thought my experiences to be fairly comprehensive. I know people can get pretty religious about oils claiming some are miles better than others. I don't want to bible punch but my personal experiences have left me very impressed with RedLine MTL in the 308/246 gearboxes. Without a doubt the best shifting I have had and it is immediately noticeable.
     
  10. ttforcefed

    ttforcefed F1 World Champ
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    have never heard any complaints with MTL!
     
  11. 4CamGT

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    Rob, Thanks for your considerable knowledge based off of personal experiences/experiments!

    I was also searching Corbani’s blogs and found this interesting:
    https://www.ferrarichat.com/forum/threads/dino-saga-050814-_-2nd-gear-fixes-shift-gate.70700/#post-135133561
     
  12. Ken Ivey

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    After a discussion in this Chat Room, I changed to Red Line. I don't notice the transmission - by that I mean it shifts well, even when cold. It just does what it is supposed to do. Doe it drip oil - sure...
     
  13. 4CamGT

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    Ken, which Redline gear oil did you end up using? Weight? MTL or NS?
     
  14. Ken Ivey

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    Not many memory cells left, but I found the container - 75W90NS
     
  15. 4CamGT

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    Thanks Ken!
     
  16. 4CamGT

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    Any one else with experiences with Redline MTL in a vintage Ferrari, especially in a Dino or 308?
     
  17. JCR

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    Redline uses mostly a polyol ester base stock. Motul is another but not their whole product line. In simple terms a polyol ester maintains its viscosity (ie. thickness) over a wide temperature range compared to other basestocks. This means that that is does not thicken up in the cold and thin out in the heat as much as other basestocks. The other basestocks have to add pour point depressants (for cold) and viscosity index improvers (for heat) to maintain viscosity over a wide range of temperatures. These additives have their own drawbacks.

    See the Polyol Ester section:
    https://www.bobistheoilguy.com/esters-in-synthetic-lubricants/
     
  18. 4CamGT

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  19. Skippr1999

    Skippr1999 F1 Rookie
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    I can second what’s been said about MTl.

    I had been using Redline NS in a 308, Alfa’s, and 930 Turbo with good results. Rifledriver suggested the MTL for my Dino and 328. I switched and I notice things are better in the Dino for sure. Cold shifts are relatively smooth and the occasional 2nd gear crunch seems to have become much more infrequent.
     
  20. 4CamGT

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    I see a lot of people are looking at this thread and some valuable experiences, especially with Redline MTL. Any other experiences with MTL or other gearbox lubricants? Positive or negative. Your experiences and experiments are valuable to all of us owners!
     

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