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599 - Reverse (gear unavailable)

Discussion in '612/599' started by Justin Hughes, Mar 29, 2021.

  1. Justin Hughes

    Justin Hughes Rookie
    Silver Subscribed

    Mar 8, 2020
    41
    Oxfordshire - UK
    Full Name:
    Hughesie
    Hi all

    weird one today

    car recently serviced and driven less than 50 miles but just come out of two weeks storage on trickle charge

    all fine till trying to select rear - no warnings just displaying gear unavailable - all forward gears working fine - just unable to select reverse

    any thoughts or ideas ?

    hughesie
     
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  3. marcmc8867

    marcmc8867 Formula Junior

    Jul 27, 2004
    964
    NC
    Full Name:
    Marc M.
    My 612 does this occasionally. I don’t yet know the reason but it always is solved by putting into first gear and then try and reverse again.
     
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  4. brogenville

    brogenville Formula Junior
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    Apr 24, 2012
    941
    UK
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    Robin
    Best guess is that one of the various permissives needed to select reverse isn't met. For example, the car needs to see brakes on, speed zero, clutch engaged etc. before it will allow reverse to be selected. I suppose you could use live data monitoring to see what's up.
     
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  5. r0sco

    r0sco Karting
    Silver Subscribed

    Jan 21, 2011
    85
    Melbourne
    Full Name:
    Ross
    I had a similar problem with my 612. It didn’t happen every time and usually (but not always) when the engine and gearbox were cold. The techs at my dealer were unable to diagnose the cause but they (and I) believed it was a hydraulic issue. Over a couple of years they replaced F1 pump, accumulator, sensors, clutch, flywheel and thrust bearing, gearbox oil, battery, you name it, and each time it improved a little but it wasn’t fixed. Eventually they persuaded me that it was probably an internal gearbox problem, and when they stripped it down they found a damaged selector rod bushing and wear on other bushes. They replaced the damaged parts and also the synchronizer hubs and a bearing.
    The car has been perfect ever since.
    Good luck with your diagnosis.
     
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  6. Justin Hughes

    Justin Hughes Rookie
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    Mar 8, 2020
    41
    Oxfordshire - UK
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    Hughesie
    Thanks all - worked fine after being left over night :)

    Will see if its an ongoing issue.

    Its done 500 miles on a new clutch so its not related to that I don't think :)
     
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  8. tazandjan

    tazandjan Three Time F1 World Champ
    Lifetime Rossa Owner

    Jul 19, 2008
    33,572
    Clarksville, Tennessee
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    Terry H Phillips
    She just wanted you to know she is female and likes attention.
     
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  9. Justin Hughes

    Justin Hughes Rookie
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    Mar 8, 2020
    41
    Oxfordshire - UK
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    Hughesie
    Gah, its back again !
     
  10. Skidkid

    Skidkid F1 Veteran
    Rossa Subscribed Owner

    Aug 25, 2005
    6,654
    Campbell, CA
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    John Zornes
    You say 'just serviced' what did that include?
     
  11. tazandjan

    tazandjan Three Time F1 World Champ
    Lifetime Rossa Owner

    Jul 19, 2008
    33,572
    Clarksville, Tennessee
    Full Name:
    Terry H Phillips
    Reverse button?
     
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  13. Justin Hughes

    Justin Hughes Rookie
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    Mar 8, 2020
    41
    Oxfordshire - UK
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    Hughesie
    Annual Service - Oil and inspection
    Pads & Fluid - CCB F&R inc sensors etc
    Uprated fluid
    FR Lower ball joint & Hunter wheel Alignment
     
  14. Justin Hughes

    Justin Hughes Rookie
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    Mar 8, 2020
    41
    Oxfordshire - UK
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    Hughesie
    I don't think so, its working, just not engaging reverse it seems.
     
  15. Skidkid

    Skidkid F1 Veteran
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    Aug 25, 2005
    6,654
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    John Zornes
    A lot of possibilities. Bad sensor (many can do it but if it thinks the shaft is turning it won't go into R), clutch dragging (not fully disengaged, again many causes), brake switch, .... the list is long. You need a a lot of time and/or a computer to solve this one.
     
  16. tazandjan

    tazandjan Three Time F1 World Champ
    Lifetime Rossa Owner

    Jul 19, 2008
    33,572
    Clarksville, Tennessee
    Full Name:
    Terry H Phillips
    John- Affirmative, but most of those things will also prevent her from selecting first gear. Difference is first is selected with the paddles and reverse is selected with a push button, so something to do with that unique selection mode.
     
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