Wheels spinning when on jacks, engine running and in neutral | FerrariChat
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Wheels spinning when on jacks, engine running and in neutral

Discussion in 'Technical Q&A' started by RGigante, Oct 12, 2007.

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  1. RGigante

    RGigante F1 Rookie
    Owner Project Master

    Nov 1, 2006
    2,874
    Portugal
    #1 RGigante, Oct 12, 2007
    I've noticed something I believe is not normal, but would like to know if anybody has experienced the same thing...

    I had the car on jacks and started the engine to warm up the oil before replacement. The car is in neutral, but the rear wheels start spinning ! After double checking that it was in fact in reverse, I've tried to stop the movement at the wheel, but it's not easy !

    So guys, is this normal, has anyone had the same thing happening ?

    Thanks!
     
  2. Steve King

    Steve King F1 Rookie

    Feb 15, 2001
    4,367
    NY
    #2 Steve King, Oct 12, 2007
    Yes this is normal.
     
  3. rbf41000

    rbf41000 Formula Junior

    Nov 21, 2005
    686
    Delray Beach FL
    Full Name:
    Russell
    #3 rbf41000, Oct 12, 2007
    Friction in the gearbox (oil etc) will make the transmision move when in neutral and wheels off the ground.


    Russell
     
  4. Dr Tommy Cosgrove

    Dr Tommy Cosgrove Three Time F1 World Champ
    Owner Rossa Subscribed

    May 4, 2001
    36,264
    Birmingham, AL
    Full Name:
    Tommy
    #4 Dr Tommy Cosgrove, Oct 12, 2007
    everybody's does it
     
  5. DavidDriver

    DavidDriver F1 Rookie

    May 9, 2006
    4,424
    Grass Valley, CA
    Full Name:
    David Driver
    #5 DavidDriver, Oct 12, 2007
    Not just friction Russell. When it's "engaged", then the movement of the shafts is locked together. But even before that, they are all spinning independantly.

    When in neutral, EVERYTHING in the gearbox moves and every shaft turns. That's why it's imperative that you wait until your engine and gearbox are fully warmed up, before you rev your engine with impunity.

    The guy who starts his engine and revs it up really high to hear that great Ferrari sound before the gearbox is fully warmed up too, is putting enormous wear and tear on the gears. It's like metal-on-metal.

    I wrote about this in the 308/328/Mondial thread too.

    Here's the link:

    http://www.ferrarichat.com/forum/showpost.php?p=136867830&postcount=51
     
  6. RGigante

    RGigante F1 Rookie
    Owner Project Master

    Nov 1, 2006
    2,874
    Portugal
    #6 RGigante, Oct 12, 2007
    Thanks guys ! It feels much better to know it is normal.
    For the record, I NEVER go above 3,000 rpm until all temperatures have reached their normal operating values.
     

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