99 360 tanny problem (f1) | FerrariChat
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99 360 tanny problem (f1)

Discussion in '360/430' started by hummerboy24, Oct 10, 2012.

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  1. hummerboy24

    hummerboy24 Karting

    Sep 5, 2012
    68
    Winston-salem
    Full Name:
    Tony
    #1 hummerboy24, Oct 10, 2012
    ok here is the question at hand. Upshifting (f1) is ok (1-6) but it is the down part that has me stumped! 6-5 ok, 5-4 ok, 4-3 ok, its when you go from 3-2 that it makes a not so much as a clung sound but more like, i dont know, a scratching sound. Now keep in mind that the compression on the whole is great, changed the gear oil too and seem to make it a little better, blead the whole system, did everything to do other than take the tranny out! What do you think it could be? 91% clutch life! Please help if you can. Thanks
     
  2. rustybits

    rustybits F1 Rookie
    Professional Ferrari Technician

    Jan 28, 2007
    2,509
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    Eddie B
    #2 rustybits, Oct 10, 2012
    Wear/pressure leak in the actuator or a shot synchro. You need someone to take a look at the parameters using an sd2 to diagnose properly. Actuator issues usually show up as big pressure drops. There are two internal sets of seals, so it's possible to get an issue with only certain gear selections.if the actuator has wear it can be adjusted. Otherwise it's an internal gearbox(selector/synchro) issue..
     
  3. hummerboy24

    hummerboy24 Karting

    Sep 5, 2012
    68
    Winston-salem
    Full Name:
    Tony
    #3 hummerboy24, Oct 10, 2012
    what would/should the parameters be? couldthis be done outside of a shop with the right tools and help?
     
  4. rustybits

    rustybits F1 Rookie
    Professional Ferrari Technician

    Jan 28, 2007
    2,509
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    Eddie B
    #4 rustybits, Oct 10, 2012
    You need an sd2. You should look at system pressure while selecting the affected gears. Big pressure drops point towards leakage. You need to look at the selector figures to asses wear in the bottom part of the actuator. It's worth paying someone to diagnose it, then you can repair it yourself. Be aware there are some special tools you need to strip the transmission or re-align the actuator shift mechanism.
     

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