[ROVERNET - UK] Gearbox changes

[Eric Russell]

Fritz,
A 401******** is a bushing box.
The main gears have a larger inner diameter to match
the phosphor bronze bushes (X2).

The 415******* series uses main gears with a smaller
inner diameter to match the roller bearings.

The reverse gear is the same.

The idler gear can be used.  In one case there is a
castle nut at one end and in the other case a bolt is
used.

The 415 was introduced as the phosphor bronze bush got
crunched under some conditions.

8 hours re and re plus gearbox time to just replace
the bush(es).  Major bummer!


Eric



--- Fritz Rauschenberg <wfritz at mindspring.com> wrote:

> Regarding gearboxes, My 69 2000TC has a four speed
> box that begins with
> 401.... and has a "G" suffix. So what do I have? The
> bushing type or the
> needle -roller-bearing type. It needs work (prob.
> synchro rings on 1-2-3)
> but I don't want to spend money on a "bushing box".
> Any ideas as to what I
> have ?
> 
> Fritz Rauschenberg
> Atlanta
> 
> 
> 
> > [Original Message]
> > From: Gordon Harrower <griffo at comcast.net>
> > To: <rovernet at lyris.ccdata.com>
> > Date: 8/27/2006 1:14:18 AM
> > Subject: Re: [ROVERNET - UK] Gearbox changes
> >
> > Vern Klukas wrote:
> >
> > >> My gearbox saga continues, and I'd like to
> consult the more 
> > >> knowledgeable.  I'm prepared to rebuild the
> gearbox on my 1968 TC 
> > >> (gearbox suffix F), and have bought the
> necessary parts from Pierre. 
> > >> Meanwhile, someone has offered me a functional
> gearbox from a 1971 
> > >> TC.  Are there major differences or
> improvements in the later 'box? 
> > >> Will it fit in my '68?  Gordon.
> > >>
> > >> _______________________________________________
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> > >>
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> > >
> > >
> > > Internally, your "F" gearbox is a bushing type,
> while the 71 will be a 
> > > needle roller type. That means that the internal
> mainshaft parts are 
> > > not interchangeable. The needle roller gearboxes
> (suffix H and above) 
> > > are better but (technically) slightly nosier due
> to the many more 
> > > rotating bits. The early bushing type gearbox
> had problems with the 
> > > bush for 2nd and 3rd gear breaking, but unless
> you came across a low 
> > > mileage original all of those have long since
> broken and been fixed.
> > >
> > > Yours
> > > Vern
> > >
> > Thanks, Vern.  I'll let you know how it goes. 
> Gordon.
> >
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> instructions:
> >
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> 
> 
> 
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> 


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