https://www.facebook.com/1
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On Wed 19/06/19 2:53 PM ,
Terry Oâ??Beirne via Fot
fot@autox.team.net sent:
> I started converting our
race boxes to taper
rollers on the layshaft
> almost 30 years ago.
Totally agree with Geoff
that the replacement
> syncro rings are
generally very poor, but
as yet, have not found the
> need or $ to convert to
a dog box, nice as that
might be. I luckily
> still have a small stash
of original Leyland ST
close ratio gears but
> as they dry up, will be
forced into â??plan Bâ??
> Terry
>
> Another down under racer
> FROM: Fot ON BEHALF OF
Geoff Byrne via Fot
> SENT: 19 June 2019 21:14
> TO:
van.mulders.marcel@telenet
.be
> CC: fot
> SUBJECT: Re: [Fot] TR4
transmission
> Iâ??ve been racing my tr6
for over 15 years and gave
up,on the
> synchro box due to the
inability to get good
quality rings. Swapped to
> a quaiffe dog box and
ended up buying another
one from Vessey and a
> third from bustuck .
Having experienced several
counter shaft needle
> bearing failures which
can be very costly I have
developed a box with
> ball bearings on a fixed
lay shaft. Does involved a
bit of machining
> but as I have my own
machine shop and the time
it not a problem for
> me. After four years of
solid racing the ball
bearing are still
> perfect. Not for
everyone but bullet proof.
>
> If anyone is interested
in details email me
>
> Regards
>
> Geoff Byrne TR6 racer
down under
>
> Sent from my iPad
> On 19 Jun 2019, at 6:14
am, van.mulders.marcel---
via Fot wrote:
>
>
> Bastuck announced a new
batch of dog box gear sets
that should have
> been available from
february 2019 onwards. It
took longer, but these
> sets are available now.
>
> Marcel.
> ------------------------
-
> VAN: "fot"
> AAN: "Tony Drews"
> CC: "fot"
> VERZONDEN: Dinsdag 18
juni 2019 18:54:23
> ONDERWERP: Re: [Fot] TR4
transmission
> I would add that you can
buy individual parts for
the quaife should
> you wear out a hub or
chip a tooth . Each
component has laser
engraved
> part numbers .
>
> T
>
> Sent from my iPhone
> On Jun 18, 2019, at 9:20
AM, Tony Drews via Fot
wrote:
>
> Nice summary! I don't
have much to add other
than the Quaife gearset
> uses substantial needle
bearings inside each of
the gears, much larger
> input to mainshaft
needle bearing, steel
thrust washers within the
> stack. Work of art.
Layshaft still uses semi-
stock bearings.
>
> When I blew up my tranny
I ended up going with the
Quaife and really
> like it. No synchros to
break, shifts are
lightning quick, gear
> ratios work well.
>
> Cheers, Tony Drews
>
> On 6/18/2019 9:24 AM,
Robert Lang via Fot wrote:
>
> Hi,
> Those are THE questions,
aren't they?
> Okay - Quaife has a
straight-cut gear set that
uses dog-rings, no
> synchros. Big $$$, 1600
UK pounds. Quaife just ran
off a set and the
> one source that I know
of in the UK can get them:
> Dennis Vessey - Quaife
gear kits for Triumph TRs
[6]
> DENNIS VESSEY - QUAIFE
GEAR KITS FOR TRIUMPH TRS
> metatags generator
>
> Vesseys Triumph TR Dog-
Engagement Gear Kit -
developed with Quaife
> Note, if you decide to
go that route, please
contact me, I've been in
> contact with the vendor
and I'm trying to place an
order for this
> gearset. Maybe we can
save some shipping if we
get a couple of sets.
>
> Note too that Bastuck
has dog box gear sets
including one using the
> J-type overdrive. When I
contacted them last fall,
they had none in
> stock and there was no
production scheduled.
> Failing that option,
there's the "Dolomite
Close Ratio Gearset". This
> consists of a different
input shaft and main 3rd
gear along with the
> corresponding layshaft
gears. You need to work
the case to get these
> to pit, but they work
great. These are helical
gears. I've used this
> setup for around 20
years, and it is really
really good. Note: for the
> best total gear ratio
option, get a later TR6
gearbox with the
> 16-tooth 1st laygear.
> Now, the drawback to the
helical gears is
apparently excessive
thrust
> forces and they effect
the layshaft thrust
washers as well as the
> layshaft needle
bearings. If you make
torque and you have any
end
> float for the layshaft,
you will spin the thrust
washers and wreck the
> case. There are some
workarounds to compensate
for excessive end
> float.
> Note too that because of
torque multiplication, the
layshaft needle
> bearings on the 1st gear
end of the layshaft get
beat really, really
> hard. One fix is to
install a double bearing
on the layshaft (or buy a
> new one from Moss or
another source) that is
set up for the double
> bearing. I've had
Quantum Mechanics install
the double bearings, they
> seem to work better than
the stock setup. But even
with that setup,
> the layshaft still gets
pounded and you need to
keep an eye on it.
> As you may know, a lot
of the racers are
gravitating away from the
> stock and/or modified
Triumph gearboxes mostly
because the quality
> consistency of
replacement parts is all
over the place and you
need to
> know what you're getting
to spot the differences.
That said, frequent
> oil changes and paying
attention to the detritus
in the oil, you can
> stay ahead of problems.
> If you're going to build
a good gearbox, it will
cost you as much or
> more than some of the
conversions out there,
hence a lot of folks
> switch to
Toyota/T5/Rocket, etc.
> Hopefully you'll get
other good advice on this
list, but that's where
> I'm at right now (too).
The Quaife gearset in the
TR gearbox seems
> like the most "vintage"
solution, but ALL of the
options have pluses
> and minuses. In the
spirit of full
transparency, I'm also
looking at
> Super T10 transmissions
which are the same as the
old Muncie "Rock
> Crusher" and there is a
gearset available with a
2.43 1st, 1.63 2nd,
> 1.23 3rd and 1 4th which
is pretty close to the
Dolomite Sprint setup.
> And the gearbox is 70
pounds which is really
close to the stock box.
> Also, if you want to
dish out more $$$, Gear
Vendors has an overdrive
> that bolts to the T-10,
I haven't researched that
enough to see if
> there are any
particulars, but it is an
option, albeit around $3k.
But
> you get a BRAND NEW
overdrive. Just sayin. A
drawback to the Super T10
> is that you will need to
make or source a bell
housing, but that is
> do-able with a combo of
a trashed TR gearbox, a
competent machinist
> and more $$$. ;-)
> Regards,
>
> Bob Lang
>
> 339-927-4489
> On Tuesday, June 18,
2019, 9:02:31 AM EDT, Mike
Deweerd via Fot
> wrote:
> Amici
>
> What is the preferred
gearbox for the TR4 non
overdrive and where is
> the best source for
getting such
>
> Iâ??m looking at the pros
and cons of the straight
cut gear set vs
> the close ratio gear set
(Iâ??m assuming the close
ratio is still
> helical gears)
>
> Please chime in with
preferences and opinions
>
> Cheers
>
> Mike Deweerd #77
> Sent from my iPhone
>
>
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> Links:
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> [6]
> http://www.vessey-
classic-car-
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gear-kit.htm#.XQjuu3t7
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