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Re: [WPTA] Gearbox oils, now overheating problem

To: Tom Stricker via Wpta <wpta@autox.team.net>, Jay Galbreath <tr4jay@gmail.com>, Clayton Yonker <ccyonker@gmail.com>, Ed Major <ejmajortr3a@comcast.net>
Subject: Re: [WPTA] Gearbox oils, now overheating problem
From: Tom Stricker via Wpta <wpta@autox.team.net>
Date: Mon, 7 Aug 2023 16:48:24 +0000 (UTC)
Delivered-to: mharc@autox.team.net
Delivered-to: wpta@autox.team.net
References: <406312821.96811.1691326249963@connect.xfinity.com> <213815639.120123.1691329119613@connect.xfinity.com> <CACh__AmMuWYh-=rCEbANQEouasqD8GMNagw5d1DeS5RGRCcR_g@mail.gmail.com> <CA+Sxo6ZvO9aLK7StSv1BoAhfw5TxvwStpqcV1S3s9U=zYwDSHw@mail.gmail.com> <238556685.436153.1691406484301@mail.yahoo.com> <532568215.2914.1691412109810@connect.xfinity.com>
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 Hey guysJust crawled out from under the car. Waiting for the MT90 to refil=
l the transmission.=C2=A0After struggling to get the thermostat out, I foun=
d the gutw were already removed. Note to self: Check maintenance records to=
 prevent doing jobs twice.Sadly though the overheating will require another=
 solution. Now I'm wondering about waterpump updates.Tom
    On Monday, August 7, 2023, 08:42:12 AM EDT, Ed Major <ejmajortr3a@comca=
st.net> wrote: =20
=20
   Tom, I suggest blocking the bypass hose too.   Ed (M) =20
  On 08/07/2023 7:08 AM EDT Tom Stricker via Wpta <wpta@autox.team.net> wro=
te:   =C2=A0   =C2=A0    =C2=A0   Thanks guys   Red Line seems to be a safe=
 bet. Spurred on by Ed and not remembering how long since my oil has been c=
hanged, I ordered some MT90.   The oil should arrive tomorrow.   Today I'm =
going to gut my thermostat to see if it is causing my overheating problem. =
  I appreciate all the help.   Tom      On Monday, August 7, 2023, 12:14:06=
 AM EDT, Clayton Yonker via Wpta <wpta@autox.team.net> wrote:   =C2=A0   =
=C2=A0      After the issues I was having with a j type transmission I=E2=
=80=99ll never use anything other than MT-90(thanks Jay) I had previously u=
sed straight 30 weight non detergent oil and 20/50 pennsgrade and had issue=
s. It cleared up the overdrive issue and haven=E2=80=99t had any problems s=
ince.  =20
    On Sun, Aug 6, 2023 at 6:59 PM Jay Galbreath via Wpta <wpta@autox.team.=
net> wrote:  =20
   In the early 80=E2=80=99s BL Factory recommended that all Triumph (Rover=
) 5 speed trannys have ATF. I still recommend 30 weight non-detergent =C2=
=A0oil for a B tranny. . Jay  =20
   On Sun, Aug 6, 2023 at 10:53 AM JIM UNDERWOOD via Wpta <wpta@autox.team.=
net> wrote: =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 =
many times I had the engine in and out thinking it was the clutch hanging u=
p.=C2=A0 Ran into the same issue on a friends 79B with OD.=C2=A0 The TR8 ge=
ts GM syncromesh fluid which is a light viscosity.=C2=A0 ATF works as well =
and many use that.=C2=A0 Put Gear oil in a Rover 5spd and you will be grind=
ing gears until it gets hot.=C2=A0=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
  _______________________________________________=20
wpta@autox.team.net=20
=20
-------------------------------------=20
=20
http://www.wptriumph.org=20
=20
Archive: http://www.team.net/archive=20
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wpta@autox.team.net=20
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-------------------------------------=20
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http://www.wptriumph.org=20
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Archive: http://www.team.net/archive=20
ail.com =20
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=20
 =20
    =C2=A0     _______________________________________________=20
wpta@autox.team.net=20
=20
-------------------------------------=20
=20
http://www.wptriumph.org=20
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Archive: http://www.team.net/archive=20
ahoo.com=20
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<html><head></head><body><div class=3D"ydpfb937943yahoo-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">Hey guys</div><div dir=3D"lt=
r" data-setdir=3D"false">Just crawled out from under the car. Waiting for t=
he MT90 to refill the transmission.&nbsp;</div><div dir=3D"ltr" data-setdir=
=3D"false">After struggling to get the thermostat out, I found the gutw wer=
e already removed. Note to self: Check maintenance records to prevent doing=
 jobs twice.</div><div dir=3D"ltr" data-setdir=3D"false">Sadly though the o=
verheating will require another solution. Now I'm wondering about waterpump=
 updates.</div><div dir=3D"ltr" data-setdir=3D"false">Tom</div><div><br></d=
iv>
       =20
        </div><div id=3D"yahoo_quoted_2415645527" class=3D"yahoo_quoted">
            <div style=3D"font-family:'Helvetica Neue', Helvetica, Arial, s=
ans-serif;font-size:13px;color:#26282a;">
               =20
                <div>
                    On Monday, August 7, 2023, 08:42:12 AM EDT, Ed Major &l=
t;ejmajortr3a@comcast.net&gt; wrote:
                </div>
                <div><br></div>
                <div><br></div>
                <div><div id=3D"yiv6545092784"><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;">Tom, I suggest blo=
cking the bypass hose too.</span>
  </div>=20
  <div style=3D"font-size:12pt;font-family:helvetica, arial, sans-serif;col=
or:#333333;" class=3D"yiv6545092784default-style">
   <span style=3D"font-family:helvetica;font-size:12pt;">Ed (M)</span>
  </div>=20
  <blockquote type=3D"cite">=20
   <div id=3D"yiv6545092784yqtfd19379" class=3D"yiv6545092784yqt9112740644"=
><div>
    On 08/07/2023 7:08 AM EDT Tom Stricker via Wpta &lt;wpta@autox.team.net=
&gt; wrote:
   </div>=20
   <div>
    &nbsp;
   </div>=20
   <div>
    &nbsp;
   </div>=20
   <div style=3D"font-family:Helvetica Neue, Helvetica, Arial, sans-serif;f=
ont-size:13px;" class=3D"yiv6545092784ydp6356d8afyahoo-style-wrap">=20
    <div>
     &nbsp;
    </div>=20
    <div dir=3D"ltr">
     Thanks guys
    </div>=20
    <div dir=3D"ltr">
     Red Line seems to be a safe bet. Spurred on by Ed and not remembering =
how long since my oil has been changed, I ordered some MT90.
    </div>=20
    <div dir=3D"ltr">
     The oil should arrive tomorrow.
    </div>=20
    <div dir=3D"ltr">
     Today I'm going to gut my thermostat to see if it is causing my overhe=
ating problem.
    </div>=20
    <div dir=3D"ltr">
     I appreciate all the help.
    </div>=20
    <div dir=3D"ltr">
     Tom
    </div>=20
   </div>=20
   <div id=3D"yiv6545092784yahoo_quoted_1511015566" class=3D"yiv6545092784y=
ahoo_quoted">=20
    <div style=3D"font-family:'Helvetica Neue', Helvetica, Arial, sans-seri=
f;font-size:13px;color:#26282a;">=20
     <div>
      On Monday, August 7, 2023, 12:14:06 AM EDT, Clayton Yonker via Wpta &=
lt;wpta@autox.team.net&gt; wrote:
     </div>=20
     <div>
      &nbsp;
     </div>=20
     <div>
      &nbsp;
     </div>=20
     <div>=20
      <div id=3D"yiv6545092784">=20
       <div>=20
        <div>
         After the issues I was having with a j type transmission I=E2=80=
=99ll never use anything other than MT-90(thanks Jay) I had previously used=
 straight 30 weight non detergent oil and 20/50 pennsgrade and had issues. =
It cleared up the overdrive issue and haven=E2=80=99t had any problems sinc=
e.
        </div>=20
        <div>
         <br clear=3D"none">=20
         <div class=3D"yiv6545092784gmail_quote">=20
          <div id=3D"yiv6545092784yqtfd11260" class=3D"yiv6545092784yqt4863=
681892">=20
           <div dir=3D"ltr" class=3D"yiv6545092784gmail_attr">
            On Sun, Aug 6, 2023 at 6:59 PM Jay Galbreath via Wpta &lt;<a re=
l=3D"nofollow noopener noreferrer" shape=3D"rect" ymailto=3D"mailto:wpta@au=
tox.team.net" target=3D"_blank" href=3D"mailto:wpta@autox.team.net";>wpta@au=
tox.team.net</a>&gt; wrote:
           </div>=20
          </div>=20
          <blockquote>=20
           <div id=3D"yiv6545092784yqtfd91775" class=3D"yiv6545092784yqt486=
3681892">=20
            <div>
             In the early 80=E2=80=99s BL Factory recommended that all Triu=
mph (Rover) 5 speed trannys have ATF. I still recommend 30 weight non-deter=
gent &nbsp;oil for a B tranny. . Jay
            </div>=20
            <div>
             <br clear=3D"none">=20
             <div class=3D"yiv6545092784gmail_quote">=20
              <div dir=3D"ltr" class=3D"yiv6545092784gmail_attr">
               On Sun, Aug 6, 2023 at 10:53 AM JIM UNDERWOOD via Wpta &lt;<=
a rel=3D"nofollow noopener noreferrer" shape=3D"rect" ymailto=3D"mailto:wpt=
a@autox.team.net" target=3D"_blank" href=3D"mailto:wpta@autox.team.net";>wpt=
a@autox.team.net</a>&gt; wrote:
              </div>=20
              <blockquote>
               <u></u>=20
               <div>=20
                <div style=3D"font-size:12pt;font-family:helvetica, arial, =
sans-serif;color:#333333;">
                 <span style=3D"font-family:helvetica;font-size:12pt;">I fo=
und that in my MGB, the OD would slip on a high RPM shift with gear oil.&nb=
sp; Switched to ATF and the issue was gone.&nbsp; I don't know how many tim=
es I had the engine in and out thinking it was the clutch hanging up.&nbsp;=
 Ran into the same issue on a friends 79B with OD.&nbsp; The TR8 gets GM sy=
ncromesh fluid which is a light viscosity.&nbsp; ATF works as well and many=
 use that.&nbsp; Put Gear oil in a Rover 5spd and you will be grinding gear=
s until it gets hot.&nbsp;&nbsp;</span>
                </div>=20
               </div>=20
               <div>=20
                <div style=3D"font-size:12pt;font-family:helvetica, arial, =
sans-serif;color:#333333;">
                 &nbsp;
                </div>=20
                <div style=3D"font-size:12pt;font-family:helvetica, 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 &lt;<a re=
l=3D"nofollow noopener noreferrer" shape=3D"rect" ymailto=3D"mailto:wpta@au=
tox.team.net" target=3D"_blank" href=3D"mailto:wpta@autox.team.net";>wpta@au=
tox.team.net</a>&gt; wrote:
                 </div>=20
                 <div>
                  &nbsp;
                 </div>=20
                 <div>
                  &nbsp;
                 </div>=20
                 <div style=3D"font-size:12pt;font-family:helvetica, arial,=
 sans-serif;color:#333333;">
                  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:#333333;">
                  And, by the way, when=E2=80=99s the last time it=E2=80=99=
s 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:#333333;">
                  &nbsp;
                 </div>=20
                 <div style=3D"font-size:12pt;font-family:helvetica, arial,=
 sans-serif;color:#333333;">
                  Ed Woods
                 </div>=20
                 <div style=3D"font-size:12pt;font-family:helvetica, arial,=
 sans-serif;color:#333333;">
                  &nbsp;
                 </div>=20
                 <div style=3D"font-size:12pt;font-family:helvetica, arial,=
 sans-serif;color:#333333;">
                  &nbsp;
                 </div>=20
                 <div style=3D"font-size:12pt;font-family:helvetica, arial,=
 sans-serif;color:#333333;">
                  People confuse engine oil weights with gear oil weights. =
They have &gt; nothing to do with each other. A 75w gear oil has about the =
same viscosity &gt; {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&nbsp; used because they did not have a gear oil that was th=
in enough. Light&nbsp; weight gear oils are fairly new. The last 15 years o=
r so. Gear oils are designed for shear stregnth. Meaning they cling to virt=
ical surfaces. Engine oil does not. By using straight weight engine oils yo=
u are using ancient technology. It would be the same as putting on rayon/ny=
lon tires, using poor fuel etc. We use 75w/80 gear oil in all but our racin=
g 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 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 bras=
s. The light weight gear oils shift better and protect your gears better th=
an any engine oil.=20
                  <br clear=3D"none">Ralph Steinberg
                 </div>=20
                </blockquote>=20
               </div> _______________________________________________
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hape=3D"rect" ymailto=3D"mailto:wpta@autox.team.net"; target=3D"_blank" href=
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