348 crunching gear when changing down from 5th to 4th | FerrariChat
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348 crunching gear when changing down from 5th to 4th

Discussion in '348/355' started by rob308, Dec 28, 2010.

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  1. rob308

    rob308 Rookie

    Nov 19, 2009
    13
    #1 rob308, Dec 28, 2010
    Hi Everybody,

    Thought i'd ask this question here seeing as the UK CS site dont bother to reply!!.
    As said in the title, only happens when cold,I know about the the 1st to 2nd gears ,I had a 308 before this one.
    But I never noticed this before,is it common for these to crunch only changing down (not up) from 5th to 4th?,when warm, fault dissapears,could this mean that the cables need re-adjusting,or is the box on its way out,done 44k,and well looked after servicing wise.

    Would appreciate any replys
    Thank you

    Rob
     
  2. mseals

    mseals Two Time F1 World Champ
    Lifetime Rossa Owner

    Sep 9, 2007
    24,468
    Kuwait
    Full Name:
    Mike Seals
    #2 mseals, Dec 28, 2010
    I am as far away from being an expert as possible... but, from all my reading here, it sounds like a job for Redline...

    Gear Oil, that is....

    Mike
     
  3. plugzit

    plugzit F1 Veteran
    Silver Subscribed

    Dec 1, 2004
    7,779
    Redondo Beach, CA
    Full Name:
    Bruce Bogart
    #3 plugzit, Dec 28, 2010
    Probably a broken spring in the syncro, common in these boxes. Take a look at the parts diagram and you'll see why.
     
  4. sambomydog

    sambomydog Guest

    May 23, 2009
    1,380
    #4 sambomydog, Dec 28, 2010
    Oh that happens here as well at times. Thats just how forums are at times.
     
  5. troy_wood

    troy_wood Formula 3

    Apr 28, 2007
    1,457
    Nova Scotia, Canada
    Full Name:
    Troy Wood
    #5 troy_wood, Dec 28, 2010
    I notice you are in Essex - How cold are we talking about?
     
  6. rob308

    rob308 Rookie

    Nov 19, 2009
    13
    #6 rob308, Dec 28, 2010
    not much troy,lowest -12,normally around 0
    Essex UK

    Rob
     
  7. portogts

    portogts Formula 3
    Owner Project Master

    Aug 31, 2008
    2,344
    Maia-Portugal
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    Vitor Sousa
    #7 portogts, Dec 28, 2010
    Hi there!

    First i would change the gearbox oil and yes i would use Red Line .
    I have seen miracles on my Testarossa and a 328 GTS after using Red Line!!

    If you change the oil , you can see if you have some tiny metal parts coming out with the gearbox oil and on the oil plug...
     
  8. troppoveloce

    troppoveloce Formula Junior

    Jan 25, 2006
    268
    New Hampshire
    Full Name:
    Tom
    #8 troppoveloce, Dec 28, 2010
    Are you rev-matching (double clutching/shifting)?
    I find that my car shifts much more easily if I do this.
     
  9. Chupacabra

    Chupacabra F1 Rookie
    Owner Rossa Subscribed

    Sep 30, 2005
    3,529
    Behind a drum kit
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    Mr. Chupacabra
    #9 Chupacabra, Dec 28, 2010
    +1.
     
  10. blackcross

    blackcross Karting

    Jun 23, 2007
    100
    #10 blackcross, Dec 28, 2010
    Last edited: Dec 28, 2010
    Worst case could be a lost synchro. I've lost my 4 to 3 synchro and must match revs to downshift.

    Happened slowly over a year and about 6000km.

    I Plan on a full rebuilt later this summer after saving up.
     
  11. plugzit

    plugzit F1 Veteran
    Silver Subscribed

    Dec 1, 2004
    7,779
    Redondo Beach, CA
    Full Name:
    Bruce Bogart
    #11 plugzit, Dec 28, 2010
    It's the $1 spring in the syncro that does that-it breaks. More expensive to fix than to live with it. All the redline in the world won't fix that spring.
     
  12. rbellezza

    rbellezza F1 Rookie

    Jun 18, 2008
    2,793
    Henderson, NV
    Full Name:
    Roberto Bellezza
    #12 rbellezza, Dec 28, 2010
    Last edited: Dec 28, 2010
    I agree, I would start by changing oil gear with Redline and go from there, hopefully is not the spring ...
     

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