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Now that you have the relief valve reinstalled correctly, the only other
variable is the oil. I suggest you drain the gearbox/OD and refill with
the same oil you use in the engine. I've owned two MGBs with OD and
always used engine oil. It was Castrol 20-50 until I changed to
Valvoline racing oil of the same grade after the flat-tappet scare
started going around. Never had any trouble with the ODs and I drove
both cars plenty.
CR
On 1/18/2019 10:32 AM, Jack Wheeler via Mgs wrote:
> Hi Paul. You are correct, I removed the low pressure valve, NOT the
> pump assembly. I was looking at the manual and the parts which came
> out appeared to be closer to those shown as the pump assembly, but
> neither was the same as mine. That's how I assumed it was the pump
> assembly.
>
> So, now that I have the low pressure valve installed properly, the
> overdrive still does not engage. The other thing I changed was the
> gear oil. I always used straight 50 Wt. motor oil in my overdrives,
> and that worked fine. Based on a recent article in the Tech Issue of
> "MG Driver" magazine, I switched to EP 85/90 GL-4 gear oil. Do you
> think this could be causing the problem?
>
> Thanks for your help.
>
> Jack
>
>
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Now that you have the relief valve reinstalled correctly, the only
other variable is the oil. I suggest you drain the gearbox/OD and
refill with the same oil you use in the engine. I've owned two MGBs
with OD and always used engine oil. It was Castrol 20-50 until I
changed to Valvoline racing oil of the same grade after the
flat-tappet scare started going around. Never had any trouble with
the ODs and I drove both cars plenty.<br>
<br>
CR<br>
<br>
<div class="moz-cite-prefix">On 1/18/2019 10:32 AM, Jack Wheeler via
Mgs wrote:<br>
</div>
<blockquote type="cite"
cite="mid:2070239259.1770028.1547829159984@mail.yahoo.com">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<div class="ydp836d150eyahoo-style-wrap"
style="font-family:Helvetica Neue, Helvetica, Arial,
sans-serif;font-size:13px;">
<div>Hi Paul. You are correct, I removed the low pressure
valve, NOT the pump assembly. I was looking at the manual and
the parts which came out appeared to be closer to those shown
as the pump assembly, but neither was the same as mine.Â
That's how I assumed it was the pump assembly.</div>
<div><br>
</div>
<div>So, now that I have the low pressure valve installed
properly, the overdrive still does not engage. The other
thing I changed was the gear oil. I always used straight 50
Wt. motor oil in my overdrives, and that worked fine. Based
on a recent article in the Tech Issue of "MG Driver" magazine,
I switched to EP 85/90 GL-4 gear oil. Do you think this could
be causing the problem?</div>
<div><br>
</div>
<div>Thanks for your help.</div>
<div><br>
</div>
<div>Jack<br>
</div>
<div><br>
</div>
</div>
<br>
</blockquote>
<br>
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