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I've only rebuilt my BJ8 gearbox a couple times, but haven't had any
visible wear on the needle bearings. Last rebuild, I replaced them 'on
principle.'Â I wonder if using synthetic gearbox oil helps preserve them?
On 3/5/2020 10:25 PM, Patrick & Caroline Quinn wrote:
>
> Hello Mike
>
> Can you please let us know how the magnet is fitted to the gearbox
> drain plug for a sideshift box.
>
> They can be purchased complete from Denis Welsh for £9.95 plus
> postage, but would be interested in doing my own.
>
> Thanks
>
> Patrick Quinn
>
> Blue Mountains, Australia
>
> *From:*Healeys [mailto:healeys-bounces@autox.team.net] *On Behalf Of
> *Michael Salter
> *Sent:* Thursday, 5 March 2020 7:51 PM
> *To:* Bob Spidell
> *Cc:* healeys@autox.team.net
> *Subject:* Re: [Healeys] Differential vs BN2 OVERDRIVE
>
> Quite correct Bob,
>
> However I believe the premature failure of the laygear needle bearings
> is caused by circulation of the microscopic chips of hardened steel
> that are shed by the 1st, reverse and laygear when people grind them
> together.
>
> To minimize this I always install a magnet on the gearbox drain plug
> to supplement the overdrive one.
>
> I have been restoring (replacing) the 1st gear section of MG "T"
> series gearboxes for several years for which we have been using a
> tougher steel alloy for the replacement 1st gear. To date have
> experienced no failures, even in boxes that have been raced extensively.
>
> I would presume that the people doing the Healey laygears are using
> similar material.
>
> M
>
> On Thu, Mar 5, 2020 at 6:26 PM Bob Spidell <bspidell@comcast.net
>
> Don't forget the laygear shafts; they wear at the ends due to the
> side
> loads. Hopefully, the 'uprated' DWM shaft I just installed holds up.
>
> ps. The only laygears I've seen advertised were 'rebuilt'--i.e.
> welded
> together--is there a source now for new laygears?
>
> bs
>
> On 3/4/2020 9:15 PM, Michael Salter wrote:
> > One consideration regarding the use of 1st gear is the
> durability of
> > said gear. With a count of only 13 the straight cut teeth on the
> > laygear tend to wear very quickly when subjected to any sort of
> load.
> > Although laygears and 1st gears are available rebuilding a
> gearbox is
> > not an inexpensive exercise so starting off gently in 2nd gear is
> > HIGHLY recommended.
> >
> > M
>
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I've only rebuilt my BJ8 gearbox a couple times, but haven't had any
visible wear on the needle bearings. Last rebuild, I replaced them
'on principle.'Â I wonder if using synthetic gearbox oil helps
preserve them?<br>
<br>
<br>
<div class="moz-cite-prefix">On 3/5/2020 10:25 PM, Patrick &
Caroline Quinn wrote:<br>
</div>
<blockquote type="cite"
cite="mid:009401d5f380$072c12b0$15843810$@tpg.com.au">
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<p class="MsoNormal"><span style="font-size:11.0pt">Hello
Mike<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt"><o:p>Â </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Can you
please let us know how the magnet is fitted to the gearbox
drain plug for a sideshift box.<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt"><o:p>Â </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">They can be
purchased complete from Denis Welsh for </span><span
style="font-size:11.0pt">£</span><span
style="font-size:11.0pt">9.95 plus postage, but would be
interested in doing my own.<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt"><o:p>Â </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt">Thanks<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt"><o:p>Â </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Patrick
Quinn<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Blue
Mountains, Australia<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt"><o:p>Â </o:p></span></p>
<p class="MsoNormal"><b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif""
lang="EN-US">From:</span></b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif""
lang="EN-US"> Healeys
[<a class="moz-txt-link-freetext"
href="mailto:healeys-bounces@autox.team.net";>mailto:healeys-bounces@autox.team.net</a>]
<b>On Behalf Of </b>Michael
Salter<br>
<b>Sent:</b> Thursday, 5 March 2020 7:51 PM<br>
<b>To:</b> Bob Spidell<br>
<b>Cc:</b> <a class="moz-txt-link-abbreviated"
href="mailto:healeys@autox.team.net";>healeys@autox.team.net</a><br>
<b>Subject:</b> Re: [Healeys] Differential vs BN2
OVERDRIVE<o:p></o:p></span></p>
<p class="MsoNormal"><o:p>Â </o:p></p>
<div>
<div>
<p class="MsoNormal"><span style="font-family:"Comic
Sans MS"">Quite correct Bob, <o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span style="font-family:"Comic
Sans MS"">However I believe the premature failure
of the laygear needle bearings is caused by circulation
of the microscopic chips of hardened steel that are shed
by the 1st, reverse and laygear when people grind them
together. <o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span style="font-family:"Comic
Sans MS"">To minimize this I always install a
magnet on the gearbox drain plug to supplement the
overdrive one. <o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span style="font-family:"Comic
Sans MS"">I have been restoring (replacing) the 1st
gear section of MG "T" series gearboxes for several
years for which we have been using a tougher steel alloy
for the replacement 1st gear. To date have experienced
no failures, even in boxes that have been raced
extensively. <o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span style="font-family:"Comic
Sans MS"">I would presume that the people doing the
Healey laygears are using similarÂ
material.<o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span style="font-family:"Comic
Sans MS""><o:p>Â </o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span style="font-family:"Comic
Sans MS"">M<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal"><o:p>Â </o:p></p>
<div>
<div>
<p class="MsoNormal">On Thu, Mar 5, 2020 at 6:26 PM Bob
Spidell <<a href="mailto:bspidell@comcast.net";
moz-do-not-send="true">bspidell@comcast.net</a>>
wrote:<o:p></o:p></p>
</div>
<blockquote style="border:none;border-left:solid #CCCCCC
1.0pt;padding:0cm 0cm 0cm
6.0pt;margin-left:4.8pt;margin-right:0cm">
<p class="MsoNormal" style="margin-bottom:12.0pt">Don't
forget the laygear shafts; they wear at the ends due to
the side <br>
loads. Hopefully, the 'uprated' DWM shaft I just
installed holds up.<br>
<br>
ps. The only laygears I've seen advertised were
'rebuilt'--i.e. welded <br>
together--is there a source now for new laygears?<br>
<br>
bs<br>
<br>
On 3/4/2020 9:15 PM, Michael Salter wrote:<br>
> One consideration regarding the use of 1st gear is
the durability of <br>
> said gear. With a count of only 13 the straight cut
teeth on the <br>
> laygear tend to wear very quickly when subjected to
any sort of load.<br>
> Although laygears and 1st gears are available
rebuilding a gearbox is <br>
> not an inexpensive exercise so starting off gently in
2nd gear is <br>
> HIGHLY recommended.<br>
><br>
> M<br>
</p>
</blockquote>
</div>
</div>
</blockquote>
<br>
<br>
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