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I found that in my MGB, the OD would slip on a high RPM shift with gear oil=
. Switched to ATF and the issue was gone. I don't know how many times I h=
ad the engine in and out thinking it was the clutch hanging up. Ran into t=
he same issue on a friends 79B with OD. The TR8 gets GM syncromesh fluid w=
hich is a light viscosity. ATF works as well and many use that. Put Gear =
oil in a Rover 5spd and you will be grinding gears until it gets hot. =20
Jim
> On 08/06/2023 8:50 AM EDT EDWARD WOODS via Wpta <wpta@autox.team.net> wro=
te:
> =20
> =20
> For all of you still using engine oil in your Triumph 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
> =20
> Ed Woods
> =20
> =20
> People confuse engine oil weights with gear oil weights. They have > noth=
ing to do with each other. A 75w gear oil has about the same viscosity > {p=
ourability} as 20w engine oil. Back in the days when your cars were new oil=
technology expecially gear oil was rather crude. 30w engine oil was used =
because they did not have a gear oil that was thin enough. Light weight ge=
ar oils are fairly new. The last 15 years or so. Gear oils are designed for=
shear stregnth. Meaning they cling to virtical surfaces. Engine oil does n=
ot. By using straight weight engine oils you are using ancient technology. =
It would be the same as putting on rayon/nylon tires, using poor fuel etc. =
We use 75w/80 gear oil in all but our racing boxes. These use a 75w synthet=
ic oil. One of the boxes, a pre-war jag box had over 30,000 miles of rallie=
s on it before it broke a gear tooth. There was no evidence of abnormal bra=
ss wear on the syncros. I have never had an oil engineer in 25+ years of bu=
siness tell me that hypoid oil attacks brass. The light weight gear oils sh=
ift better and protect your gears better than any engine oil.
> Ralph Steinberg
>=20
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<!doctype html>
<html>
<head>=20
<meta charset=3D"UTF-8">=20
</head>
<body>
<div style=3D"font-size: 12pt; font-family: helvetica,arial,sans-serif; c=
olor: #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. Switche=
d to ATF and the issue was gone. I don't know how many times I had th=
e engine in and out thinking it was the clutch hanging up. Ran into t=
he same issue on a friends 79B with OD. The TR8 gets GM syncromesh fl=
uid which is a light viscosity. ATF works as well and many use that.&=
nbsp; Put Gear oil in a Rover 5spd and you will be grinding gears until it =
gets hot. </span>
</div>=20
<div class=3D"default-style" style=3D"font-size: 12pt; font-family: helve=
tica,arial,sans-serif; color: #333333;">
<span style=3D"font-family: helvetica; font-size: 12pt;">Jim</span>
</div>=20
<blockquote type=3D"cite">=20
<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 class=3D"default-style" style=3D"font-size: 12pt; font-family: helv=
etica,arial,sans-serif; color: #333333;">
For all of you still using engine oil in your Triumph or MG gearboxes:
</div>=20
<div class=3D"default-style" style=3D"font-size: 12pt; font-family: helv=
etica,arial,sans-serif; color: #333333;">
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 class=3D"default-style" style=3D"font-size: 12pt; font-family: helv=
etica,arial,sans-serif; color: #333333;">
</div>=20
<div class=3D"default-style" style=3D"font-size: 12pt; font-family: helv=
etica,arial,sans-serif; color: #333333;">
Ed Woods
</div>=20
<div class=3D"default-style" style=3D"font-size: 12pt; font-family: helv=
etica,arial,sans-serif; color: #333333;">
</div>=20
<div class=3D"default-style" style=3D"font-size: 12pt; font-family: helv=
etica,arial,sans-serif; color: #333333;">
</div>=20
<div class=3D"default-style" style=3D"font-size: 12pt; font-family: helv=
etica,arial,sans-serif; color: #333333;">
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>Ralph Steinberg
</div>=20
</blockquote>
</body>
</html>
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