A friend's 966 has taken to puking oil out the breather when put in forward or reverse,any idea's .thanks Wayne
What series of 966..? C, D, H, ..? Serial Number prefix ..? Which breather ..? Transmission..?
sorry about that,the transmission breather on top.also it's a C with ser # 30k2577.Hope that helps.Thanks
That's the breather mounted on top of the transmission control valve case, correct ..? Does the breather start blowing oil as soon as you shift into gear or does it take a few seconds..? Sounds like there could be a seal blown in the control valve assembly at the top of the transmission. It would need the cover plate taken off for a look-see. Maybe the oil drain from that area back down into the main transmission case is restricted. Does the transmission work fine, clutches not slipping, slow to engage gears, anything like that ..?
It appears to have just started to doing it,and the oil startsas soon as it is put into either gear.Other than the oil leaking the transmission operates fine,no noticeable shifting lag slipping ,etc.Regards Wayne
I think it may be worth taking the top cover off to have a look inside. Maybe something's blocking the drain port back down into the transmission case, either that or it's blown a seal up in the control valve.
I,ll take a look when it warms up some,thanks Nige
sorry to ask the basic question but is the oil level ok, not overfull with a sudden loss of Hyd oil?
that's correct ,no loss of hyd. oil
You could try cranking it up while you have the cover off, but make sure you have something installed in its place like a piece of perspex so that you don't get a bath. That might help you see where it's coming from. The control valve will always lose a certain amount of oil when the transmission is in gear. That oil will drain back into the transmission case. So the only way to pump oil out of the breather that I can see is that either the oil drain passage back into the transmission case is partially or completely blocked, or the valve assembly is leaking so much when the transmission is in gear that oil that the drain cannot cope with all the flow and so blows the rest out of the breather.
Hey the plexi -glass is a good idea.I'll try that next week when I'm in the shop .Thanks again Nige !
Drill some holes in it and bolt it to the top of the tranny where the cover was removed. If you don't and it catches a good spray of oil from underneath it could likely blow it clean off. Not good if you have your head close to it at the time ...!!
If it is leaking out of one of the holes in the top of the valve body see if you can relocate the breather so not to get direct shot of oil. It would take alot to plug the drains back to main case. ( chances are it could have broke a modulation spring in the valve body ) you get it working keep an eye on temp a that oil could be oil that should go through cooler