<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto">All great advice. Another easy approach is to add vent to the cover on the boss where the TR2 dipstick once lives. These are sold online:<div><br><div><img src="cid:CAC1D9A2-A99D-4D18-893B-399466854D43" alt="image"></div><div><br></div><div><br id="lineBreakAtBeginningOfSignature"><div dir="ltr">You only get one chance at life, make it a TRIUMPH.</div><div dir="ltr"><br><blockquote type="cite">On Oct 22, 2025, at 9:56 AM, Tony Garmey via Fot <fot@autox.team.net> wrote:<br><br></blockquote></div><blockquote type="cite"><div dir="ltr">
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The oem vent is a small hole in the tail shaft under the shift tower.
<div>If your sure that the o rings are leaking - go ahead and pop of the gearbox top and …</div>
<div>*Add a dash4 fitting for a vent </div>
<div>*drill and lock wire the set screws that loc the selector forks to the rails</div>
<div>* tach weld the centre blade at the end of the rail .</div>
<div>* change the o rings </div>
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<div>British frame and engine for the majority of the engine parts. </div>
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<div dir="ltr">Sent from my iPhone</div>
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<blockquote type="cite">On Oct 22, 2025, at 7:23 AM, mhmolson--- via Fot <fot@autox.team.net> wrote:<br>
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<p class="MsoNormal"><span style="font-size:11.0pt">Good morning, I have an issue with transmission oil leaking out of the three o ring seals where the transmission selector shafts enter the top cover. This only happens during high rpms. This is an overdrive
unit.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Has anyone added additional venting to the top cover. I understand there is possibly a small vent hole in the front however I have not looked at this yet. I am also going to build a TR4 motor this winter and
am looking for direction and contacts for pistons, liners, and rods. I am good at mechanical logistics, and I have built two strokes, I have also been around engine builders and understand, however this will be my first real build. Yes, I understand that certain
things will be left to the pro’s<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Help appreciated<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Matt<o:p></o:p></span></p>
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