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I've read through all the information I can find regarding extending the diff breathers.
I've managed to do both diffs and the tight transfer case breather.
Now all the info regarding the gearbox breather refers to the manual which is super accessible in the engine bay.
Does the auto just not have one?
Sorry to bring this topic back, but I'm about to extend breathers in my JB74 as well... has anyone confirmed that the auto JB74 does not have a gearbox breather?? Only 3 breathers to extend?
Also, has anyone moved the breathers further up than the engine bay, through the snorkel?
Former owner of JB43 (4sport BR trim) for 6 years/200,000+ km
Currently own auto JB74 since Aug-21 (80,000 km)
- OME suspension kit
- Long Ranger 80L tank
My previous reply was based on a relatively longstanding "truth" from another forum. I have since come across additional pictures of a Gen3 auto (TW40) showing a breather at the rear of the transmission. I still believe it is the same transmission on the Gen4. Attached are the pictures.
I apologize for the earlier misinformation.
I started out with nothing & still have most of it left
I would be very surprised if the auto did not have some sort of breather as although ATF is not supposed to froth, there will be an increase in air pressure due to heat and that needs to be dealt with. The picture shows a feature that looks like a breather and is where I would expect a breather to be, so maybe!!!
As to where to exit the breather, I took mine high up in the engine compartment and capped it with a small motorcycle fuel filter.
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