Archived posting to the Leica Users Group, 2003/12/13

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Subject: Re: [Leica] RE: Farm Tractors &SUV's(direct shift twin clutch gearbox)OT
From: Frank Dernie <Frank.Dernie@btinternet.com>
Date: Sat, 13 Dec 2003 16:05:52 +0000

De-clutching is disengaging the clutch.
Frank

On Saturday, December 13, 2003, at 12:35  pm, Patrick Jelliffe wrote:

> I think the synchros tend to go first, (after
> 250-300K).  Is de-clutching the same as down shifting
> from a higher gear to a lower?
>
> Thanks,
>
> Patrick
>
> --- Frank Dernie <Frank.Dernie@btinternet.com> wrote:
>> There will be less wear on syncro rings if you
>> double de-clutch
>> correctly, however judging whether you are doing it
>> correctly is
>> difficult with a syncro box unless you know what to
>> feel for. If the
>> syncro rings are not the limiting factor in the
>> transmission life
>> saving them won't help:-)
>> Frank
>>
>> On Saturday, December 13, 2003, at 11:54  am,
>> Patrick Jelliffe wrote:
>>
>>> Hi Frnak,
>>>
>>> Should I be double clutching when I downshift my
>> Volvo
>>> 544?  I have the standard 4 speed, and single
>>> clutching seems fine, but I'd like to get another
>> 40
>>> years out of the tranny...
>>>
>>> Regards,
>>>
>>> Patrick
>>>
>>> --- Frank Dernie <Frank.Dernie@btinternet.com>
>> wrote:
>>>> Excellent - I believe it works extremely well
>> AFAIK
>>>> developed by
>>>> Porsche racing quite a few years ago - I have
>>>> forgotten the name they
>>>> gave it.
>>>>
>>>>
>>>> On Saturday, December 13, 2003, at 11:09  am,
>> animal
>>>> wrote:
>>>>
>>>>>
>>>>
>>>
>>
> http://www.audi.com/com/en/new_cars/driveline_suspension/
>>>>
>>>>>
>>>>
>>>
>>
> directshiftgearbox/technicaldetails/technicaldetails.jsp
>>>>> nice idea no?
>>>>>
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