Overdrive breather

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dand
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Overdrive breather

Post by dand » Sun Aug 11, 2019 7:51 am

We've been refurbing the gearbox on the coupe and as we're about to refit the overdrive unit to it noticed that the breather on the top of the overdrive is very wobbly and loose fitting.

Is this how it's supposed to be? Seems a good potential source source of oil leaks given the pressures in the overdrive?



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Overdrive breather

Post by gtcse8 » Sun Aug 11, 2019 8:47 am

Which OD unit is it?.
I have some New breather inserts for Laycock OD.
Picture would be good?.
Mark


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Overdrive breather

Post by dand » Sun Aug 11, 2019 11:49 am

Here you go. I think it's a standard Laycock unit from 1967. It's in a 3.0 V6 coupe.
Attachments
OD breather 1.jpg
OD breather 1.jpg (204.84 KiB) Viewed 165 times
OD breather 2.jpg
OD breather 2.jpg (217.41 KiB) Viewed 165 times



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Overdrive breather

Post by scimjim » Sun Aug 11, 2019 1:23 pm

Looked at a spare box and it doesn’t move. I don’t think it matters too much if it’s just the cap (which is there to stop fluid/debris ingress) - crimp the edge a bit to hold it in place?

Or is the actual vent loose?


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Overdrive breather

Post by dand » Sun Aug 11, 2019 3:16 pm

It's the actual event that's loose. Seems to be held in by a spring that allows a fair bit of wobble.



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Overdrive breather

Post by gtcse8 » Sun Aug 11, 2019 4:38 pm

Hi
Have found my New vents and they are the later press in type.
Don`t know if they will fit your unit.
OD_Vent_size[1].jpg
OD_Vent_size[1].jpg (145.91 KiB) Viewed 116 times
OD_Vent[1].jpg
OD_Vent[1].jpg (134.47 KiB) Viewed 116 times


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Overdrive breather

Post by dand » Sun Aug 11, 2019 8:36 pm

I think those are a different design. But let me remove it from the O/D casing and I'll see how the whole thing looks.



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