Troopy diff breathers

hi dz

the diff breathers of any diff should be free to breath at all times otherwise you will eventually blow an oil seal

the breathers tend to block after stints in a heavy dust/mud enviroment they can be taken out and cleaned with kero/diesel and compessed air i had one block up after been up north and blew the front diff seal before finding this out

all manually engaged diffs and locks should by rule of thumb be actuated about once a month as they generally rely on splash feed and can get a bit dry if not used very often

hope this helps your concern
cheers

Hi DZ. We had the same issue with our troopy, the Toyota fitted ends on the air lines coming from the diffs have some kind of ball and seat valve in them which gets jammed up and then blocked, ( happened to one of mine and sounds like yours too.) When I extended the breathers through to the engine bay, I fitted smallish in-line fuel filters in the ends and then cable tied them high up on the firewall, works well for me. Cheers, Kanga.

I have raised the diff breathers on my troopy but have not been able to locate any breathers on the gearbox or transfer box. Do these have breathers and if so where are they located? Searching inspection with torch and mirror and groping have not revealed them to me.

Ok, I've done it. But what a cow of a job!

The gearbox breather is, as said, on top, behind the gear lever and close to the rear flange of the gearbox. Unlike the diff breathers which were screwed-in, this connection is very stubby and did not look as though it would be cooperative in being removed.

The 1st photo below shows the breather with the cap and valve removed.

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I decided to leave this fitting in place and attach the extension directly to it. Its 10mm diameter was too large and too short to directly connect a rubber tube so I modified a nylon elbow to accept the tubing and force-fit over the breather stub. This 2nd photo shows the tubing connected to the modified elbow.

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After thoroughly cleaning off the grease and dust the elbow was then pressed over the breather stub as shown in the 3rd photo, and the tubing run to the engine bay, securing it along the way with cable ties.

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Finally, a generous blob of silicon sealer was applied around and over the elbow to secure it to the gearbox. I sincerely hope that it remains secured or I will have an unrestricted opening on the gearbox! But I am reasonably confident and will check it before my first deep crossing.

The transfer case is integral with the gearbox and does not appear to have a breather.

Apologies for the photo quality. It was hard enough to get a camera in there without be able to focus it correctly! Like I say. it was a difficult job but I will feel a bit happier now if I get stuck in a creek and have to spend some time in recovery.

"When I removed the front diff breather hose there was a release of pressure. "
Dennis, the valves allow air out but close to prevent anything going back in. The noise was most likely air being sucked in which is normal - means your seals are good. Often get that noise when you undo the filler plug to check the level.
And yes, ditch the valves and put a fuel filter. The valves are responsible for water being sucked in past the seals when the diff gets cooled underwater.