Automatic trans question - 986 Forum - The Community for Porsche Boxster & Cayman Owners

wvicary · 01-26-2007, 06:53 PM

It is possiable that they just over filled it with fluid.

Grizzly · 01-26-2007, 08:31 PM

Quote:

Originally Posted by wvicary

It is possiable that they just over filled it with fluid.

That's what it sounds like to me. Either that or they didn't get a good seal on the gasket.

MNBoxster · 01-26-2007, 10:37 PM

Quote:

Originally Posted by wvicary

It is possiable that they just over filled it with fluid.

Hi,

They could well have overfilled it, especially since ATF has such a large expansion coefficient. The Coolant and the tranny have to be between 80°F & 100°F when filled. If over this temp, the tranny will be underfilled, if under, the tranny will be overfilled.

The problem is, there is no vent for ATF to escape from. An Automatic does pressurize the fluid and so it may be able (if overfilled) to force past one of the ancillaries I mentioned. I'd start by checking these for the source of the fluid.

FYI, the Tiptronic S rarely fails. One of the Dealerships here in MSP has never had to service any of their Boxster TipS cars aside from normal fluid/filter changes, at least that's what the Service Mgr. told me...

Happy Motoring!... Jim'99

ntroffroad · 01-27-2007, 08:33 AM

Thanks for all the info, glad to hear there is no vent so it has to be coming out of something attached to the trans. I am starting to make room for it in the garage today, I'm anxious to get it in the air so I can start taking it apart.
Thanks again for the info.

wvicary · 01-27-2007, 08:59 AM

There should be a vent for the transmission, it is often cast into the housing and is concealed in the torque convertor area. I can't say if the Boxster uses the same set up but do know for a fact that the automatics that I've worked on do have a vent.

In any event, it's easy enough to over/under fill this type unit and you should return to the dealer for repair.

ntroffroad · 01-27-2007, 09:58 AM

Thanks for all the info, glad to hear there is no vent so it has to be coming out of something attached to the trans. I am starting to make room for it in the garage today, I'm anxious to get it in the air so I can start taking it apart.
Thanks again for the info.