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  • 4 months later...

did anyone try to change ta another brand? and did that help?

i have the same problem, had a bunch of other brands before then after one change it started to spit out of the breather.

Yes and yes. You can change the oil or extend the breather as above.

  • 1 year later...

Let me revive this thread.

I've been having this issue with my rb25. Oil leaking out of my tranny breather hose. Yesterday I changed my fluid, thinking that maybe my shockproof lightweight had worn out and become even thinner and this would fix it. I also added a small water/oil separator at the end of the hose in the engine bay, like someone in this thread suggested a long time ago. I though this would fix it and it would take forever to fill the separator/filter. Well, today I popped the hood to check on my filter, and...

 GFLOdqQl.jpg

So, after doing further research I came across this thread from '10.

https://aus300zx.com/xenforo/index.php?threads/oil-from-gearbox-vent.300868/

Very interesting. One member mentions how having a bent vent tube pointing downwards can cause this problem. I did noticed mine is bent a bit, downwards. I will bend it up a bit as soon as I get a chance, hopefully this solves my problem.

I just thought I'd share this in case anyone out there is having this problem.

I will report the results.

I still have dramas with mine, Thinking about changing oils and going away from redline lightweight, But the box feels so much nicer with redline oil in it.

I'm fairly certain I bent the tube straight a while ago and still didn't fix the issue, thats when I went to the breather setup, but I'm getting problems like yours. Was starting to think I had put the one way baffle plate in the wrong way when I rebuilt the box but think I would have bigger issues if that was the case.

Be interested to see where everyone else is at with this issue, I first thought someone mentioned a batch of lightweight shockproof that was doing this but it was not an issue with later batches but I've had a few bottles through mine by now

Mine worked a couple of years with redlige. But after one change the problems came. Changed again to a nej redline and the problem remained. Now i drive with mobil1 and havent had a single problem ?? First i bought a cheaper oil and drove a couple of miles then changed to the mobil1 just to clean the inside and get rid of the redline oil

Edited by Ajfa
Mine worked a couple of years with redlige. But after one change the problems came. Changed again to a nej redline and the problem remained. Now i drive with mobil1 and havent had a single problem [emoji1303] First i bought a cheaper oil and drove a couple of miles then changed to the mobil1 just to clean the inside and get rid of the redline oil
Which oil are you using? Im thinking of changing

A Guy here in sweden works with renovate skyline engines and gearboxes. He hates the redline oil and says it damages the gearboxes. The picture is of the redline oil

the other picture is the oil he recomended and the one i have. 

1FEB90D7-46BF-422A-BB83-91F1D4763246.jpeg

AC1B1C0A-2457-4E4D-BD01-CCA4C82903C3.jpeg

Redline shockproof is a band aid for stuffed synchros, not for tracking. Or so I've read.


Depends on the viscosity, lightweight is intended for old boxes that are still ok, heavy is more for stuffed synchros and such. Or so I've read.
  • 5 weeks later...

Well, it's been over a month now since I bent my vent tube up slightly, and still having the same issue. As much as I love this blue stuff, I might have to go a different route... I was also thinking maybe the baffles inside the tranny.

I'll look into that mobile mobilubeGX. Any other recommendations?

Edited by andres14oj

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