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GT6 Leak in transmission

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trrdster2000

trrdster2000

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OK all you Guru's. Filling up the GT6 transmission and smiling, knowing the time is getting closer to: Fire That Sucker Up. Standing there with a smug face, I notice the Triumph has not been house trained and is leaking oil into the oil pan below the rear of the transmission. It's coming out of a dome shaped area that has a hole in it, just opposite the speedometer cable outlet. In looking at the best pictures I could fine, it looks to be a grease fitting, which in reality is probably a pressure valve. I've seen one on the top, but never there. Is this something that needs to be corrected, as there is lots of air space in a transmission?
It's got a bolt with a rubber washer to stop it from leaking right now.
There is a red square showing where it is.
Where would one find that part?

Thanks, Wayne
 

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If my orientation is right, that is the very long bolt that retains the speedo drive gear. If so, I'm afraid you are trying to stop the oil after it's already gotten out! There are 2 seals in the housing for the drive gear. One is an o-ring that goes in a groove on the outside of the housing, and the other is an actual seal that goes inside the housing to seal the gear shaft. Those seals are supposed to stop the oil before it reaches the bolt. I often put a little sealant on the threads, just as insurance...but that likely won't help if the seals are shot.

Been looking for a pic, but I don't have any. Here is the TR3 housing. It doesn't have the outside o-ring, and the retaining screw is MUCH shorter...

 
John, Thanks for the reply but have another look. This is on the other side of the transmission. I know about the seals in the cable area and thanks for the reminder.
Been doing a lot of searching and it looks like a case of casting for a speed odometer cable that the rear housing was designed for several applications.
I will tap it tomorrow and use a "O" ring on a flat bolt, this is all pending on whether someone chimes in and tells me what a dumb a.. I am. Now's your chance. LOL
Wayne
 
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