Redline does it again !!! (308qv) | FerrariChat
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Redline does it again !!! (308qv)

Discussion in 'Technical Q&A' started by spiderseeker, Apr 15, 2007.

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  1. spiderseeker

    spiderseeker Formula 3

    Jul 22, 2005
    1,718
    Colorado
    Full Name:
    Steve
    #1 spiderseeker, Apr 15, 2007
    I had the typical second gear stubbornness until I changed to redline 75w90ns , I just got back from a test drive and that stuff is amazing, it Literally shifts like butter, not even a slight hesitation or sound going into second, I feel like I have new tranny. I was skeptical that a gear oil could make such a big difference but now I’m sold.
    Best $50 that you can put into your Ferrari.
     
  2. aseweepay

    aseweepay Formula Junior

    Feb 1, 2004
    400
    Mid-West
    #2 aseweepay, Apr 15, 2007
    Awesome, the shop I take my car to put Redline 75W90 in and I still have the
    2nd gear issue, as well as the transmission feeling "notchy" every once in a while even when warm. I talked to them at the time about the 75W90NS instead and they said they have never had a problem with the 75W90 in a car with synchro...Next time it goes in I am going to have it changed...In fact
    it may be going in soon..... See my other post
     
  3. spiderseeker

    spiderseeker Formula 3

    Jul 22, 2005
    1,718
    Colorado
    Full Name:
    Steve
    #3 spiderseeker, Apr 15, 2007
    From what I hear, it's the "NS" that makes the difference.
     
  4. aseweepay

    aseweepay Formula Junior

    Feb 1, 2004
    400
    Mid-West
    #4 aseweepay, Apr 15, 2007
    I agree, but my mechanic does not, so I will have it changed when I take the car back in...which may be soon....as per my other post
     
  5. FasterIsBetter

    FasterIsBetter F1 Veteran

    Jul 22, 2004
    5,856
    NoNJ/Jupiter FL
    Full Name:
    Steve W.
    #5 FasterIsBetter, Apr 15, 2007
    The 75W90 is a hypoid gear oil intended for limited slip differentials. The hypoid modifiers don't work well with synchos in a transmission (they are actually too slippery). You need the 75W90NS, which is designed for synchromesh transmissions. While we have a transaxle in these cars, and it does have slip limiting rings, your first concern is the synchros. I've heard of some guys putting in one quart of 75W90 and the rest NS, but IMHO, I'd start with all NS and then ONLY if I got some "graunching" from the differential in tight turns would I drain off a little and add some of the 75W90 to quiet the LSD. That's what I did in my '84 Mondial QV years ago and it worked great with all NS, even the LSD.
     
  6. spiderseeker

    spiderseeker Formula 3

    Jul 22, 2005
    1,718
    Colorado
    Full Name:
    Steve
    #6 spiderseeker, Apr 15, 2007
    I also bought a pint of limited slip additive, in case I need it, but so far it's perfect without any.
     
  7. Meister

    Meister F1 Veteran
    Silver Subscribed

    Apr 27, 2001
    5,516
    Duluth, MN
    Full Name:
    The Meister
    #7 Meister, Apr 15, 2007
    Agree.
     
  8. tatcat

    tatcat F1 World Champ
    Owner Silver Subscribed

    Sep 3, 2001
    11,013
    panama city beach FL
    Full Name:
    rick c
    #8 tatcat, Apr 15, 2007
    i changed over to it and truthfully i don't see any difference if anything the shifting is stiffer.
     
  9. cwwhk

    cwwhk Formula 3

    Nov 13, 2003
    1,535
    Hong Kong, Tokyo
    Full Name:
    Wayne
    #9 cwwhk, Apr 16, 2007
    For my 550 Redline 75W90 was enough to solve the 2nd gear problem. For the 360 Spider it improved a bit but under full throttle shifts, it still would not go into 2nd quickly enough. So I used 2 liter 75W90NS mixed with 1 liter 75W90. Now all is well.

    I'll never use Shell gearbox oil again.
     

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