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F355 Gear Lever Jumping Out of Second Gear

Discussion in '348/355' started by Qavion, May 11, 2020.

  1. Qavion

    Qavion F1 Veteran
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    Feb 20, 2015
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    Ian Riddell
    I've noticed recently that my 355 (5.2) has been jumping out of second gear into neutral. I really need to pull the stick back hard to make sure it stays in there. I haven't noticed any problems with other gears, there are no rattles and the gearstick goes into all gates smoothly when the gearbox is warm.

    Is this more likely to be a wear and tear issue on the gearstick mechanism or an adjustment at the rear.

    https://www.ricambiamerica.com/car-diagrams/ferrari/v6-v8/355-group/f355-m5-2-1996/outside-gearbox-controls.html

    I have a new clutch, new 1/2/3 gears and mainshaft, new synchros on 1, 2, 3... My engine and gearbox mounts are good. After the recent overhaul of the gearbox, the clutch pedal engages gear quite high up, but it's not a problem.

    At first, the loud clicking noise as the lever jumps out of gear makes me think the passenger seat has moved forward into a detent in the seat track (not that a Spider electric seat would do this), but then I try to accelerate and nothing happens...

    Thanks in advance,
    Cheers
     
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  3. kenneyd

    kenneyd Formula 3
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    Sep 30, 2014
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    Why was the trans rebuilt?
    Almost sounds like a bent control fork. Like the slider ring isn't engaging all the way.
    When you place it in 2nd, 4th or 6th, how far back on the gate is the shifter? Is it consistent between all the even gears.?

    I hope it's fixable by adjustment, but that disheartening
     
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  4. GatedF355GTB

    GatedF355GTB Karting
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    Dec 5, 2017
    78
    I agree. To be sure, you might want to check the adjustment of your linkage. However, my money is on an internal gearbox fault. Too much coincidence that the gearbox was just opened and that you’re not having issues with any other gears.

    I had a similar experience with a Porsche 993 gearbox I had regeared. It sucked. Hoping it’s just your linkage but I’m not optimistic.
     
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  5. yelcab

    yelcab F1 World Champ
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    Nov 29, 2001
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    Mitchell Le
    Dog-teeth, otherwise known as syncro hub, and slider.

    But do try a linkage adjustment first.
     
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  6. Qavion

    Qavion F1 Veteran
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    Feb 20, 2015
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    Thanks, gents.

    Sorry... seems my memory is getting a little fuzzy... I rechecked my notes...... It wasn't gear sets 1, 2 and 3 (I was confusing it with the synchros changed):

    In January 2018 (500 kilometers/ 300 miles ago), I had the gearbox overhauled due to large bits of teeth found on the magplug. One of the main shaft bearings failed and it damaged a lot of components, including the main shaft. I'm not sure which gear set comes as standard with main shaft (1st?), but gears sets 4 and 6 were also damaged.

    I don't recall any problems immediately after the overhaul. However, I had a major done 4 months later (about 300 kilometers/200 miles ago) and I did have to take the car back after the leaving the workshop after the major because I couldn't engage some of the higher gears. I helped the technician adjust the gears (me changing gears, the technician doing the adjusting under the car). I can't recall having any problems immediately after that, but as you can see, I haven't done much driving. I'm not 100% sure when the problem started.

    Here are a couple of threads associated with the gearbox damage/overhaul

    http://www.members.iinet.net.au/~b744er@ozemail.com.au/FerrariF355Spider/DamagedGearShaft.jpg

    https://www.ferrarichat.com/forum/threads/complete-pinion-for-6th-gear-not-as-spare-part-f355-5-2.564215/

    I have Redline friction modifier added to the Redline gear oil (in recommended quantities after a gearbox overhaul).

    As you have recommended, I will do more tests on 4th and 6th, then take my car in for adjustment.

    Thanks!
     
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  8. carnutdallas

    carnutdallas Formula Junior
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    I think shaft to coupler is out of adjustment again. Maybe not locked down on shaft? I recall adjusting mine a few years ago after a shaft seal replacement- mainly to make sure it was “dialed in” and I also replaced my gate spacer and bushing which was effecting second gear as gate was wonky. K.I.S.S method: I prefer a scalpel to a sledgehammer and like to look at the small simple stuff before blaming or digging into major components again. 9 times out of 10 it works to solve problem and not pulling apart again. I hope it is simple.


    Sent from my iPhone using Tapatalk
     
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  9. Qavion

    Qavion F1 Veteran
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    Sorry, Rob, just getting used to the terminology. I guess you mean parts 37, 36, 38?

    https://www.ricambiamerica.com/car-diagrams/ferrari/v6-v8/355-group/f355-m5-2-1996/outside-gearbox-controls.html

    I'm sure the nuts are tight (I have faith in my technician), so perhaps it's just out of adjustment. Perhaps if the car is jacked up in the air, the body flexes enough to put the adjustment out when the car is put back on its wheels?
     
  10. Beetle

    Beetle Formula Junior
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    Apr 10, 2013
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    Ian I found after major service of mine on installation of the gear selector rod I have my son sit in the car whilst on the hoist. I adjust the the shaft this way while he selects gears. I have found this to be the best way. 2 man job so to speak and never had an issue. I hope this is all it is for you mate. If it doesn't fix the issue it's a synchro hub assembly as previously mentioned.
     
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  11. Qavion

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    That's basically how I did it on my car with the tech, Paul.

    Just wondering how sensitive the adjustments are. e.g. one turn = x millimetres (fore-aft) at the gate. Will increasing the length of the rod be more likely to fix my problem or decreasing the length? Will the length adjustment throw out the rotary adjustment?
     
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  13. Beetle

    Beetle Formula Junior
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    You would need to shorten the length to get it to engage more mate.
     
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  14. carnutdallas

    carnutdallas Formula Junior
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    49 and 42 are the adjustable portion as they have three slotted holes that allow for shifter external shaft adjustment to internal shaft actuation. Technically, they are never really messed with but sometimes “move” especially with the work you have had done. Just a theory, having been there before.

    Like other said. Two sets of hands with one set in car on lift sometimes help.

    The gate bushing (18) is the one that made a huge difference in my cars. Just common with age to disintegrate.


    Sent from my iPhone using Tapatalk
     
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  15. taz355

    taz355 F1 Veteran
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    Feb 18, 2008
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    Grant
    My guess is they reused them and they were rounded a little. As Mitchel has said. If it keeps getting worse that is what I would think it is.

    good news is it’s a 355, tranny is not really that hard to get out.
     
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