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=C2=A0I have just been thinking about gearbox oil as my OD TR3 shifting ha=
s not been as smooth as it was. I do check my fluid level religously as I b=
urned up my first box early on driving to Carlisle.=C2=A0=C2=A0A fine memor=
y of our great club's team effort getting me back on the road. By the time =
I found a transmission at the swap meet, the club members had my car disass=
embled and ready for the transplant.=C2=A0I have always used non-detergent =
30 weight as the book specified. Judging by the way it poured out of the bo=
ttle I worried that 75-90W would not work in my overdrive unit. I would som=
etimes add a little bit of Lucas gear oil with the 30W when topping up.=C2=
=A0This article has me confused. ATF and 75W are at the opposite ends of wh=
at I consider the viscosity scale. With ATF so thin, and gear oil so thick,=
I don't know how both could work.=C2=A0As Ed is the transmission Guru, I m=
ust admit to being lax in my transmission oil change.=C2=A0What product sho=
uld I use next?All help apprediated.Tom Stricker=C2=A0
On Sunday, August 6, 2023, 10:54:45 AM EDT, JIM UNDERWOOD via Wpta <wpt=
a@autox.team.net> wrote: =20
=20
I found that in my MGB, the OD would slip on a high RPM shift with gear =
oil.=C2=A0 Switched to ATF and the issue was gone.=C2=A0 I don't know how m=
any times I had the engine in and out thinking it was the clutch hanging up=
.=C2=A0 Ran into the same issue on a friends 79B with OD.=C2=A0 The TR8 get=
s GM syncromesh fluid which is a light viscosity.=C2=A0 ATF works as well a=
nd many use that.=C2=A0 Put Gear oil in a Rover 5spd and you will be grindi=
ng gears until it gets hot.=C2=A0=C2=A0 Jim =20
On 08/06/2023 8:50 AM EDT EDWARD WOODS via Wpta <wpta@autox.team.net> wro=
te: =C2=A0 =C2=A0 For all of you still using engine oil in your Trium=
ph or MG gearboxes: And, by the way, when=E2=80=99s the last time it=E2=
=80=99s been changed? =E2=80=9CDirt is the enemy of all machinery=E2=80=9D =
=C2=A0 Ed Woods =C2=A0 =C2=A0 People confuse engine oil weights w=
ith gear oil weights. They have > nothing to do with each other. A 75w gear=
oil has about the same viscosity > {pourability} as 20w engine oil. Back i=
n the days when your cars were new oil technology expecially gear oil was r=
ather crude. 30w engine oil was=C2=A0 used because they did not have a gear=
oil that was thin enough. Light=C2=A0 weight gear oils are fairly new. The=
last 15 years or so. Gear oils are designed for shear stregnth. Meaning th=
ey cling to virtical surfaces. Engine oil does not. By using straight weigh=
t engine oils you are using ancient technology. It would be the same as put=
ting on rayon/nylon tires, using poor fuel etc. We use 75w/80 gear oil in a=
ll but our racing boxes. These use a 75w synthetic oil. One of the boxes, a=
pre-war jag box had over 30,000 miles of rallies on it before it broke a g=
ear tooth. There was no evidence of abnormal brass wear on the syncros. I h=
ave never had an oil engineer in 25+ years of business tell me that hypoid =
oil attacks brass. The light weight gear oils shift better and protect your=
gears better than any engine oil.=20
Ralph Steinberg =20
_______________________________________________
wpta@autox.team.net
-------------------------------------
http://www.wptriumph.org
Archive: http://www.team.net/archive
ahoo.com
=20
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<html><head></head><body><div class=3D"ydp69a20ed6yahoo-style-wrap" style=
=3D"font-family:Helvetica Neue, Helvetica, Arial, sans-serif;font-size:13px=
;"><div></div>
<div dir=3D"ltr" data-setdir=3D"false"> I have just been think=
ing about gearbox oil as my OD TR3 shifting has not been as smooth as it wa=
s. I do check my fluid level religously as I burned up my first box early o=
n driving to Carlisle. </div><div dir=3D"ltr" data-setdir=3D"false">&n=
bsp;A fine memory of our great club's team effort getting me back on the ro=
ad. By the time I found a transmission at the swap meet, the club members h=
ad my car disassembled and ready for the transplant.</div><div dir=3D"ltr" =
data-setdir=3D"false"> I have always used non-detergent 30 weight as t=
he book specified. Judging by the way it poured out of the bottle I worried=
that 75-90W would not work in my overdrive unit. I would sometimes add a l=
ittle bit of Lucas gear oil with the 30W when topping up.</div><div dir=3D"=
ltr" data-setdir=3D"false"> This article has me confused. ATF and 75W =
are at the opposite ends of what I consider the viscosity scale. With ATF s=
o thin, and gear oil so thick, I don't know how both could work.</div><div =
dir=3D"ltr" data-setdir=3D"false"> As Ed is the transmission Guru, I m=
ust admit to being lax in my transmission oil change.</div><div dir=3D"ltr"=
data-setdir=3D"false"> What product should I use next?</div><div dir=
=3D"ltr" data-setdir=3D"false">All help apprediated.</div><div dir=3D"ltr" =
data-setdir=3D"false">Tom Stricker </div><div><br></div>
=20
</div><div id=3D"yahoo_quoted_2034349849" class=3D"yahoo_quoted">
<div style=3D"font-family:'Helvetica Neue', Helvetica, Arial, s=
ans-serif;font-size:13px;color:#26282a;">
=20
<div>
On Sunday, August 6, 2023, 10:54:45 AM EDT, JIM UNDERWO=
OD via Wpta <wpta@autox.team.net> wrote:
</div>
<div><br></div>
<div><br></div>
<div><div id=3D"yiv2467637146"><div>
<div style=3D"font-size:12pt;font-family:helvetica, arial, sans-serif;col=
or:#333333;">
<span style=3D"font-family:helvetica;font-size:12pt;">I found that in my=
MGB, the OD would slip on a high RPM shift with gear oil. Switched t=
o ATF and the issue was gone. I don't know how many times I had the e=
ngine in and out thinking it was the clutch hanging up. Ran into the =
same issue on a friends 79B with OD. The TR8 gets GM syncromesh fluid=
which is a light viscosity. ATF works as well and many use that.&nbs=
p; Put Gear oil in a Rover 5spd and you will be grinding gears until it get=
s hot. </span>
</div>=20
<div style=3D"font-size:12pt;font-family:helvetica, arial, sans-serif;col=
or:#333333;" class=3D"yiv2467637146default-style">
<span style=3D"font-family:helvetica;font-size:12pt;">Jim</span>
</div>=20
<blockquote type=3D"cite">=20
<div id=3D"yiv2467637146yqt13946" class=3D"yiv2467637146yqt2782902679"><=
div>
On 08/06/2023 8:50 AM EDT EDWARD WOODS via Wpta <wpta@autox.team.net=
> wrote:
</div>=20
<div>
</div>=20
<div>
</div>=20
<div style=3D"font-size:12pt;font-family:helvetica, arial, sans-serif;co=
lor:#333333;" class=3D"yiv2467637146default-style">
For all of you still using engine oil in your Triumph or MG gearboxes:
</div>=20
<div style=3D"font-size:12pt;font-family:helvetica, arial, sans-serif;co=
lor:#333333;" class=3D"yiv2467637146default-style">
And, by the way, when=E2=80=99s the last time it=E2=80=99s been changed=
? =E2=80=9CDirt is the enemy of all machinery=E2=80=9D
</div>=20
<div style=3D"font-size:12pt;font-family:helvetica, arial, sans-serif;co=
lor:#333333;" class=3D"yiv2467637146default-style">
</div>=20
<div style=3D"font-size:12pt;font-family:helvetica, arial, sans-serif;co=
lor:#333333;" class=3D"yiv2467637146default-style">
Ed Woods
</div>=20
<div style=3D"font-size:12pt;font-family:helvetica, arial, sans-serif;co=
lor:#333333;" class=3D"yiv2467637146default-style">
</div>=20
<div style=3D"font-size:12pt;font-family:helvetica, arial, sans-serif;co=
lor:#333333;" class=3D"yiv2467637146default-style">
</div>=20
<div style=3D"font-size:12pt;font-family:helvetica, arial, sans-serif;co=
lor:#333333;" class=3D"yiv2467637146default-style">
People confuse engine oil weights with gear oil weights. They have >=
nothing to do with each other. A 75w gear oil has about the same viscosity=
> {pourability} as 20w engine oil. Back in the days when your cars were=
new oil technology expecially gear oil was rather crude. 30w engine oil wa=
s used because they did not have a gear oil that was thin enough. Lig=
ht weight gear oils are fairly new. The last 15 years or so. Gear oil=
s are designed for shear stregnth. Meaning they cling to virtical surfaces.=
Engine oil does not. By using straight weight engine oils you are using an=
cient technology. It would be the same as putting on rayon/nylon tires, usi=
ng poor fuel etc. We use 75w/80 gear oil in all but our racing boxes. These=
use a 75w synthetic oil. One of the boxes, a pre-war jag box had over 30,0=
00 miles of rallies on it before it broke a gear tooth. There was no eviden=
ce of abnormal brass wear on the syncros. I have never had an oil engineer =
in 25+ years of business tell me that hypoid oil attacks brass. The light w=
eight gear oils shift better and protect your gears better than any engine =
oil.=20
<br clear=3D"none">Ralph Steinberg
</div></div>=20
</blockquote>
</div></div><div class=3D"yqt2782902679" id=3D"yqt35536">_________________=
______________________________<br clear=3D"none"><a shape=3D"rect" ymailto=
=3D"mailto:wpta@autox.team.net"; href=3D"mailto:wpta@autox.team.net";>wpta@au=
tox.team.net</a><br clear=3D"none"><br clear=3D"none">---------------------=
----------------<br clear=3D"none"><br clear=3D"none"><a shape=3D"rect" hre=
f=3D"http://www.wptriumph.org"; target=3D"_blank">http://www.wptriumph.org</=
a><br clear=3D"none"><br clear=3D"none">Donate: <a shape=3D"rect" href=3D"h=
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_______________________________________________
wpta@autox.team.net
-------------------------------------
http://www.wptriumph.org
Archive: http://www.team.net/archive
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