--===============0144580158688145208==
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Len Renkenberger wrote tech articles for the 6-pack in the early details of t=
hat TR6 club. He has a diff article that includes some trick that work for b=
uilding diffs. I've been happy with the ones I've built. Measuring pinion de=
pth before you remove the old pinion is a good place to start.
Sent from my iPhone
> On Aug 29, 2015, at 9:17 PM, Bill Babcock <Bill@ponostyle.com> wrote:
>=20
> That=E2=80=99s pretty slick, but it doesn=E2=80=99t set the pinion height.=
The pinion height above the bearing determines where the teeth contact the d=
rive gear. The lash from the shims on the right and left side of the spider d=
etermine the depth of engagement, but pinon height determines the point of e=
ngagement=E2=80=94either at the base of the driven gear, the middle (where i=
t=E2=80=99s supposed to be) or the top. Unfortunately, lacking the factory g=
ear bobs and gimcracks, the only way I know to do this is to guess, then ins=
tall everything, paint the gear teeth with blue, and roll them through an en=
gagement cycle. The pattern on the teeth tell you where you are. then take e=
verything apart again, change stuff, and try again. Last time (two weeks ago=
) took me five tries to get it right, but that=E2=80=99s better than the fir=
st time I did it. I can now fix two things at once (height and depth), and I=
=E2=80=99ve learned to go in tiny increments (.003=E2=80=9D or less if you h=
ave a skinnier shim=E2=80=94the smallest from moss are .003=E2=80=9D but my s=
tash has some .001=E2=80=9D in it of both the spider shims and the pinion sh=
ims. I don=E2=80=99t worry too much about the bearing preload for either the=
pinion or the spider. I figure if I don=E2=80=99t have shake in the pinion a=
nd can just barely get the diff out, then I=E2=80=99m in the ballpark. I=E2=80=
=99m not trying to build a 50K mile, noiseless diff, I just want it to hold t=
ogether in races and not be louder than my singing when I=E2=80=99m racing (=
yes, I do).=20
>=20
>=20
>> On Aug 29, 2015, at 3:42 PM, James J Dolan <jdolan@voyagerhldgs.com> wrot=
e:
>>=20
>> Wow
>> Imagine building Triumphs on an assembly line and doing a few hundred rea=
r axles a day that way.=20
>>=20
>> A Guinness or two at lunch and the next thing the whole contraption falls=
over and the lead shot goes everywhere, and the poor bloke spends the entir=
e work shift picking up tiny marbles. Quality control problem!!
>>=20
>> Sure explains why the damn cars stopped being made and the British no lon=
ger have an Empire.=20
>>=20
>> And to think we race them......
>>=20
>> All joking aside, that is pretty creative.=20
>>=20
>> Jim
>>=20
>> GT6 #6 Kastner
>> GT6 #4 Group 44
>> GT6 #5
>>=20
>> Sent from my iPhone
>>=20
>> On Aug 29, 2015, at 4:13 PM, J.C. Hassall <jhassall@gmail.com> wrote:
>>=20
>> Scott,
>>=20
>> This is how I set up my TR4 pinion. A 1/2" square piece of steel stock i=
nserted into a socket. The steel bar thru the square stock was counter bala=
nced to give zero rotation. With inch increments lightly notched into the r=
od, it was easy to locate the bag of lead shot at precise locations. When t=
he rod tipped, the pinion torque was dead on. BTW, the 2x4 was supporting t=
he diff front, not the drive flange. It only took a few trials to tighten t=
he nut to the required torque.
>>=20
>> hth
>>=20
>> jim
>>=20
>> <pinion preload tool.JPG>
>>=20
>>=20
>>=20
>>=20
>>=20
>>=20
>>=20
>>=20
>>=20
>>=20
>>=20
>>=20
>>=20
>>=20
>>=20
>> <pinion preload tool.JPG>
>>=20
>>> On Sat, Aug 29, 2015 at 2:54 PM, Scott Janzen <sjanzen@me.com> wrote:
>>> I'm replacing the bearings in the diff (w/Timken USA) and am puzzled by t=
he "set pinion height" instructions. Here's what the workshop manual says (=
paraphrase):
>>> - install the pinion head bearing without the normal 0.10" spacer betwe=
en it and the pinion.
>>> - install the pinion shaft with bearings, no bearing spacer, shims or oi=
l seal, and torque to 12-16 ft-lb
>>> - put a dial gauge on the housing with the plunger contacting the pinion=
, then putting downward pressure on the gauge, obtain a maximum reading (ap=
pears to be one of those special factory tools in the photo though none is c=
ited)
>>> -this reading, subtracted from the normal spacer thickness of 0.10", det=
ermines the thickness of the "selective spacer required".
>>>=20
>>> Huh? first of all, the spacer is 0.10" so how can there be a different t=
hickness spacer? The diagram shows no shims at this location. Second and m=
ore important, why would the assembly move at all and produce any dial indic=
ator readings, given that the pinion bearing assembly is torqued to 12-16 lb=
? =20
>>>=20
>>> These are not the instructions for shimming the spacer between the beari=
ngs, I understand those - though I am looking for ideas for a homemade prelo=
ad gauge I could easily make up.
>>>=20
>>> Are the instructions missing something or am I?
>>>=20
>>> thanks!
>>>=20
>>> _______________________________________________
>>> fot@autox.team.net
>>>=20
>>> http://www.fot-racing.com
>>>=20
>>> Donate: http://www.team.net/donate.html
>>> Archive: http://www.team.net/archive
>>> Forums: http://www.team.net/forums
>>> Unsubscribe/Manage: http://autox.team.net/mailman/options/fot/jhassall@g=
mail.com
>>=20
>> _______________________________________________
>> fot@autox.team.net
>>=20
>> http://www.fot-racing.com
>>=20
>> Donate: http://www.team.net/donate.html
>> Archive: http://www.team.net/archive
>> Forums: http://www.team.net/forums
>> Unsubscribe/Manage: http://autox.team.net/mailman/options/fot/jdolan@voya=
gerhldgs.com
>>=20
>>=20
>> _______________________________________________
>> fot@autox.team.net
>>=20
>> http://www.fot-racing.com
>>=20
>> Donate: http://www.team.net/donate.html
>> Archive: http://www.team.net/archive
>> Forums: http://www.team.net/forums
>> Unsubscribe/Manage: http://autox.team.net/mailman/options/fot/bill@ponost=
yle.com
>=20
> Bill Babcock
> Bill@ponostyle.com
> Editor: Ponostyle
> Celebrating Water
>=20
> Editor: Xtreme Geezer
> Fitness and Fun After Forty
> 503.936.7660
> http://www.PonoStyle.com
> http://www.Xgeez.com
>=20
> _______________________________________________
> fot@autox.team.net
>=20
> http://www.fot-racing.com
>=20
> Donate: http://www.team.net/donate.html
> Archive: http://www.team.net/archive
> Forums: http://www.team.net/forums
> Unsubscribe/Manage: http://autox.team.net/mailman/options/fot/rkramer3@aus=
tin.rr.com
>=20
>=20
--Apple-Mail-4CDDBA21-1A25-4936-BE66-6557F870C2AF
charset=utf-8
Content-Transfer-Encoding: quoted-printable
<html><head><meta http-equiv=3D"content-type" content=3D"text/html; charset=3D=
utf-8"></head><body dir=3D"auto"><div>Len Renkenberger wrote tech articles f=
or the 6-pack in the early details of that TR6 club. He has a diff article t=
hat includes some trick that work for building diffs. I've been happy with t=
he ones I've built. Measuring pinion depth before you remove the old pinion i=
s a good place to start.<br><br>Sent from my iPhone</div><div><br>On Aug 29,=
2015, at 9:17 PM, Bill Babcock <<a href=3D"mailto:Bill@ponostyle.com";>Bi=
ll@ponostyle.com</a>> wrote:<br><br></div><blockquote type=3D"cite"><div>=
<meta http-equiv=3D"Content-Type" content=3D"text/html charset=3Dutf-8">That=
=E2=80=99s pretty slick, but it doesn=E2=80=99t set the pinion height. The p=
inion height above the bearing determines where the teeth contact the drive g=
ear. The lash from the shims on the right and left side of the spider determ=
ine the depth of engagement, but pinon height determines the point of engage=
ment=E2=80=94either at the base of the driven gear, the middle (where it=E2=80=
=99s supposed to be) or the top. Unfortunately, lacking the factory gear bob=
s and gimcracks, the only way I know to do this is to guess, then install ev=
erything, paint the gear teeth with blue, and roll them through an engagemen=
t cycle. The pattern on the teeth tell you where you are. then take everythi=
ng apart again, change stuff, and try again. Last time (two weeks ago) took m=
e five tries to get it right, but that=E2=80=99s better than the first time I=
did it. I can now fix two things at once (height and depth), and I=E2=80=99=
ve learned to go in tiny increments (.003=E2=80=9D or less if you have a ski=
nnier shim=E2=80=94the smallest from moss are .003=E2=80=9D but my stash has=
some .001=E2=80=9D in it of both the spider shims and the pinion shims. I d=
on=E2=80=99t worry too much about the bearing preload for either the pinion o=
r the spider. I figure if I don=E2=80=99t have shake in the pinion and can j=
ust barely get the diff out, then I=E2=80=99m in the ballpark. I=E2=80=99m n=
ot trying to build a 50K mile, noiseless diff, I just want it to hold togeth=
er in races and not be louder than my singing when I=E2=80=99m racing (yes, I=
do). <div class=3D""><br class=3D""></div><div class=3D""><br class=3D=
""><div><blockquote type=3D"cite" class=3D""><div class=3D"">On Aug 29, 2015=
, at 3:42 PM, James J Dolan <<a href=3D"mailto:jdolan@voyagerhldgs.com"; c=
lass=3D"">jdolan@voyagerhldgs.com</a>> wrote:</div><br class=3D"Apple-int=
erchange-newline"><div class=3D"">
<meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3Dus-ascii" c=
lass=3D"">
<div dir=3D"auto" class=3D"">
<div class=3D"">Wow</div>
<div class=3D"">Imagine building Triumphs on an assembly line and doing a fe=
w hundred rear axles a day that way. </div>
<div class=3D""><br class=3D"">
</div>
<div class=3D"">A Guinness or two at lunch and the next thing the whole cont=
raption falls over and the lead shot goes everywhere, and the poor bloke spe=
nds the entire work shift picking up tiny marbles. Quality control problem!!=
</div>
<div class=3D""><br class=3D"">
</div>
<div class=3D"">Sure explains why the damn cars stopped being made and the B=
ritish no longer have an Empire. </div>
<div class=3D""><br class=3D"">
</div>
<div class=3D"">And to think we race them......</div>
<div class=3D""><br class=3D"">
</div>
<div class=3D"">All joking aside, that is pretty creative. </div>
<div class=3D""><br class=3D"">
</div>
<div class=3D"">Jim</div>
<div class=3D""><br class=3D"">
</div>
<div class=3D"">GT6 #6 Kastner</div>
<div class=3D"">GT6 #4 Group 44</div>
<div class=3D"">GT6 #5<br class=3D"">
<br class=3D"">
Sent from my iPhone</div>
<div class=3D""><br class=3D"">
On Aug 29, 2015, at 4:13 PM, J.C. Hassall <<a href=3D"mailto:jhassall@gma=
il.com" class=3D"">jhassall@gmail.com</a>> wrote:<br class=3D"">
<br class=3D"">
</div>
<div class=3D"">
<div dir=3D"ltr" class=3D"">
<div class=3D"">Scott,
<div class=3D""><br class=3D"">
</div>
<div class=3D"">This is how I set up my TR4 pinion. A 1/2" square piec=
e of steel stock inserted into a socket. The steel bar thru the square=
stock was counter balanced to give zero rotation. With inch increment=
s lightly notched into the rod, it was easy to locate the
bag of lead shot at precise locations. When the rod tipped, the pinio=
n torque was dead on. BTW, the 2x4 was supporting the diff front, not t=
he drive flange. It only took a few trials to tighten the nut to the r=
equired torque.</div>
<div class=3D""><br class=3D"">
</div>
<div class=3D"">hth</div>
<div class=3D""><br class=3D"">
</div>
<div class=3D"">jim</div>
</div>
<div class=3D""><br class=3D"">
</div>
<div class=3D""><span id=3D"cid:ii_14f7b11188c64b9a"><pinion preload tool=
.JPG></span><br class=3D"">
</div>
<div class=3D""><br class=3D"">
</div>
<div class=3D""><br class=3D"">
</div>
<div class=3D""><br class=3D"">
</div>
<div class=3D""><br class=3D"">
</div>
<div class=3D""><br class=3D"">
</div>
<div class=3D""><br class=3D"">
</div>
<div class=3D""><br class=3D"">
</div>
<div class=3D""><br class=3D"">
</div>
<div class=3D""><br class=3D"">
</div>
<div class=3D""><br class=3D"">
</div>
<div class=3D""><br class=3D"">
</div>
<div class=3D""><br class=3D"">
</div>
<div class=3D""><br class=3D"">
</div>
<div class=3D""><br class=3D"">
</div>
<div class=3D""><br class=3D"">
</div>
<span id=3D"cid:ii_14f7b0f6d0234281"><pinion preload tool.JPG></span><=
br class=3D"">
</div>
<div class=3D"gmail_extra"><br class=3D"">
<div class=3D"gmail_quote">On Sat, Aug 29, 2015 at 2:54 PM, Scott Janzen <sp=
an dir=3D"ltr" class=3D"">
<<a href=3D"mailto:sjanzen@me.com"; target=3D"_blank" class=3D"">sjanzen@m=
e.com</a>></span> wrote:<br class=3D"">
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px=
#ccc solid;padding-left:1ex">
<div style=3D"word-wrap:break-word" class=3D"">I'm replacing the bearings in=
the diff (w/Timken USA) and am puzzled by the "set pinion height" instructi=
ons. Here's what the workshop manual says (paraphrase):
<div class=3D""> - install the pinion head bearing without the normal 0=
.10" spacer between it and the pinion.</div>
<div class=3D"">- install the pinion shaft with bearings, no bearing spacer,=
shims or oil seal, and torque to 12-16 ft-lb</div>
<div class=3D"">- put a dial gauge on the housing with the plunger contactin=
g the pinion, then putting downward pressure on the gauge, obtain a maximum r=
eading (appears to be one of those special factory tools in the photo t=
hough none is cited)</div>
<div class=3D"">-this reading, subtracted from the normal spacer thickness o=
f 0.10", determines the thickness of the "selective spacer required".</div>
<div class=3D""><br class=3D"">
</div>
<div class=3D"">Huh? first of all, the spacer is 0.10" so how can ther=
e be a different thickness spacer? The diagram shows no shims at this l=
ocation. Second and more important, why would the assembly move at all=
and produce any dial indicator readings, given that the
pinion bearing assembly is torqued to 12-16 lb? </div>
<div class=3D""><br class=3D"">
</div>
<div class=3D"">These are not the instructions for shimming the spacer betwe=
en the bearings, I understand those - though I am looking for ideas for a ho=
memade preload gauge I could easily make up.</div>
<div class=3D""><br class=3D"">
</div>
<div class=3D"">Are the instructions missing something or am I?</div>
<div class=3D""><br class=3D"">
</div>
<div class=3D"">thanks!</div>
</div>
<br class=3D"">
_______________________________________________<br class=3D"">
<a href=3D"mailto:fot@autox.team.net"; class=3D"">fot@autox.team.net</a><br c=
lass=3D"">
<br class=3D"">
<a href=3D"http://www.fot-racing.com/"; rel=3D"noreferrer" target=3D"_blank" c=
lass=3D"">http://www.fot-racing.com</a><br class=3D"">
<br class=3D"">
t=3D"_blank" class=3D"">
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ssall@gmail.com" rel=3D"noreferrer" target=3D"_blank" class=3D"">
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"">
<br class=3D"">
<br class=3D"">
<br class=3D"">
</blockquote>
</div>
<br class=3D"">
</div>
</div>
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