360 F1 Gearbox or hydraulic actuator at fault? | FerrariChat
Buy

360 F1 Gearbox or hydraulic actuator at fault?

Discussion in 'Technical Q&A' started by car_nut, Aug 6, 2009.

This site may earn a commission from merchant affiliate links, including eBay, Amazon, Skimlinks, and others.

  1. car_nut

    car_nut Rookie

    Aug 23, 2005
    39
    Belgium
    Full Name:
    Hugh McGowan
    #1 car_nut, Aug 6, 2009
    Hi Guys, my local Ferrari dealer ran an SD-2 test gear selection procedure on my 2001 360 F1 Modena. During the test the gearbox warning light came on. It seems the travel distance when selecting 3rd gear is too long. (I glanced at the SD-2 readout and saw 3rd was around 273 while the others were around 243. Presumably the units are millimetres.) The mechanic said that either the hydraulic actuator or the gearbox itself was at fault as 3rd gear was effectively being pushed too far in, ouside of its operational envelope, hence the error.

    He explained that although the car works fine now, it could start popping into neutral when driving if left as is. He also said they've never had to work on a 360 gearbox, but they've replaced quite a few hydraulic actuators. If it was a geabox issue, he said it could be due to worn synchromesh for instance. Please note, my car has a brand new clutch, flywheel and bearing installed and would not appear linked to this problem. Furthermore, everything else about the F1 system checked out okay, fluid pressure at 49-50 bar, etc.

    He said I would need another appointment to delve deeper to decide which is at fault: gearbox or actuator. Either way, the parts are pricey I'm sure. So can anyone here comment from their own experience? Perhaps there's an easy way to rule out one or the other. And if it's the actuator and someone has tips on a possible rebuild then thanks as I'm on a budget. Also, any idea of how to switch off the gearbox warning light afterwards? Any advice is much appreciated.
     
  2. rustybits

    rustybits F1 Rookie
    Professional Ferrari Technician

    Jan 28, 2007
    2,509
    Somewhere, anywhere
    Full Name:
    Eddie B
    #2 rustybits, Aug 6, 2009
    I doubt it's a synchro problem, you would already be experiencing selection issues. A worn component inside a gearbox very rarely produces an intermittant fault. I'll tell you another thing, that crappy gear-learn procedure often produces negative results and stalls out half-way through the test. I try to avoid doing at all unless there's an issue somewhere. I've seen many poorly diagnosed repairs carried out by people who don't really understand how the system works. Of course, i could be wrong, maybe you have wear in the nose of the actuator, for example. In this case, a dealer won't try and repair it, they will just try and sell you a new one, but they can be adjusted, succesfully, to compensate for wear. There are people on this forum that have carried out this procedure also. If it were me, i'd drive it for a while, and see how it is. If there are no problems, great, maybe that awfull gear learn procedure just timed out as usual and there is no need to worry.
     
  3. Euromog

    Euromog Karting

    Apr 5, 2009
    102
    Oakhurst, CA
    Full Name:
    John Wessels
    #3 Euromog, Aug 6, 2009
    May I ask why this test was run? Is the F1 system setting a code? Are you having shifting into 3rd gear problems? How many miles is on your 360? How many miles has it been since you had the clutch replaced? Has the problem (if there is one) surfaced since the clutch was replaced?




    He explained that although the car works fine now, it could start popping into neutral when driving if left as is. He also said they've never had to work on a 360 gearbox, but they've replaced quite a few hydraulic actuators. If it was a geabox issue, he said it could be due to worn synchromesh for instance. Please note, my car has a brand new clutch, flywheel and bearing installed and would not appear linked to this problem. Furthermore, everything else about the F1 system checked out okay, fluid pressure at 49-50 bar, etc.
     
  4. car_nut

    car_nut Rookie

    Aug 23, 2005
    39
    Belgium
    Full Name:
    Hugh McGowan
    #4 car_nut, Aug 7, 2009
    RUSTYBITS:
    > ...that crappy gear-learn procedure often produces negative results and stalls out half-way through the test.
    Yes the test stalls half-way. But I don't want to knock the test procedure itself - I'm sure it serves a purpose. But thanks for the advice on adjusting the actuator for wear.

    EUROMOG:
    > May I ask why this test was run? Is the F1 system setting a code?
    The mechanic ran it as a kind of standard procedure in the workshop. Then the dashboard light came on due to not completing. There was no explicit fault code as I recall.

    > Are you having shifting into 3rd gear problems? How many miles is on your 360?
    No shifting problems; 40000 miles; and clutch only replaced last week.

    > Has the problem (if there is one) surfaced since the clutch was replaced?
    No, the test procedure didn't complete either before or after clutch replacement.



    Thanks for all the feedback guys!
     

Share This Page