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<html><head><meta http-equiv=3D"content-type" content=3D"text/html; charset=3D=
utf-8"></head><body dir=3D"auto">I use red line 75-90. In my four-speed race=
car gearbox. No problems.<div>Cheers <br><br><div dir=3D"ltr">Sent fro=
m my iPhone via talk to text. I apologize for poor grammar or spelling. =
;<div><br></div></div><div dir=3D"ltr"><br><blockquote type=3D"cite">On Aug 6=
, 2023, at 20:42, John Styduhar via Wpta <wpta@autox.team.net> wrote:<=
br><br></blockquote></div><blockquote type=3D"cite"><div dir=3D"ltr">=EF=BB=BF=
<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-size:small">I us=
e redline MT90 GL-4 in my gearbox and diff.</div></div><br><div class=3D"gma=
il_quote"><div dir=3D"ltr" class=3D"gmail_attr">On Sun, Aug 6, 2023 at 10:42=
=E2=80=AFAM JIM UNDERWOOD via Wpta <<a href=3D"mailto:wpta@autox.team.net=
">wpta@autox.team.net</a>> wrote:<br></div><blockquote class=3D"gmail_quo=
te" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204)=
;padding-left:1ex"><u></u>
=20
=20
=20
<div>
<div style=3D"font-size:12pt;font-family:helvetica,arial,sans-serif;color:=
rgb(51,51,51)">
<span style=3D"font-family:helvetica;font-size:12pt">I found that in my M=
GB, the OD would slip on a high RPM shift with gear oil. Switched to A=
TF and the issue was gone. I don't know how many times I had the engin=
e in and out thinking it was the clutch hanging up. Ran into the same i=
ssue on a friends 79B with OD. The TR8 gets GM syncromesh fluid which i=
s a light viscosity. ATF works as well and many use that. Put Ge=
ar oil in a Rover 5spd and you will be grinding gears until it gets hot.&nbs=
p; </span>
</div>=20
<div style=3D"font-size:12pt;font-family:helvetica,arial,sans-serif;color:=
rgb(51,51,51)">
<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 <<a href=3D"mailto:wp=
ta@autox.team.net" target=3D"_blank">wpta@autox.team.net</a>> wrote:
</div>=20
<div>
</div>=20
<div>
</div>=20
<div style=3D"font-size:12pt;font-family:helvetica,arial,sans-serif;color=
:rgb(51,51,51)">
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;color=
:rgb(51,51,51)">
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;color=
:rgb(51,51,51)">
</div>=20
<div style=3D"font-size:12pt;font-family:helvetica,arial,sans-serif;color=
:rgb(51,51,51)">
Ed Woods
</div>=20
<div style=3D"font-size:12pt;font-family:helvetica,arial,sans-serif;color=
:rgb(51,51,51)">
</div>=20
<div style=3D"font-size:12pt;font-family:helvetica,arial,sans-serif;color=
:rgb(51,51,51)">
</div>=20
<div style=3D"font-size:12pt;font-family:helvetica,arial,sans-serif;color=
:rgb(51,51,51)">
People confuse engine oil weights with gear oil weights. They have > n=
othing to do with each other. A 75w gear oil has about the same viscosity &g=
t; {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 was&nbs=
p; used because they did not have a gear oil that was thin enough. Light&nbs=
p; weight gear oils are fairly new. The last 15 years or so. Gear oils are d=
esigned for shear stregnth. Meaning they cling to virtical surfaces. Engine o=
il does not. By using straight weight engine oils you are using ancient tech=
nology. It would be the same as putting on rayon/nylon tires, using poor fue=
l etc. We use 75w/80 gear oil in all but our racing boxes. These use a 75w s=
ynthetic oil. One of the boxes, a pre-war jag box had over 30,000 miles of r=
allies on it before it broke a gear tooth. There was no evidence 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 weight gear oils s=
hift better and protect your gears better than any engine oil.=20
<br>Ralph Steinberg
</div>=20
</blockquote>
</div>
_______________________________________________<br>
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<br>
<br>
</blockquote></div>
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utox.team.net</span><br><span></span><br><span>-----------------------------=
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