How to check Gearbox oil? plx help - 986 Forum - The Community for Porsche Boxster & Cayman Owners

ancster · 05-23-2008, 04:47 AM

If you are looking to check the transmission fluid, the boxster uses the same fluid for both the brakes and transmission. You can check the level in the front trunk.

blue2000s · 05-23-2008, 06:13 AM

Quote:

Originally Posted by ancster

If you are looking to check the transmission fluid, the boxster uses the same fluid for both the brakes and transmission. You can check the level in the front trunk.

Hold on there, Boxsters use the same fluid for the CLUTCH and brakes, not the transmission. Using brake fluid in the transmission would be a very fast death of the transmission.

Here are the instructions for changing tranny fluid

http://www.renntech.org/forums/index.php?showtopic=7060

The only problem with those instructions is that they say to fill to the fill plug hole. You're actually supposed to fill to 11mm below the fill plug hole.

Lil bastard · 05-23-2008, 06:23 AM

On Cars with Manual Transmissions, the tranny and the diff share the same oil. Drain and change the tranny oil and you're also changing the diff oil.

On the Tip S cars, the diff uses the same hypoid gear lube as the manual box. But, it must be drained and filled separately from the tranny. There is no drain plug. To drain it, you must 1st remove the axleshaft and then the diff cover, replace gasket and cover, then fill through the fill plug.

As it's a sealed system, with the Tip S, it's probably not necessary to drain/fill it more often than 45-50k mi. or every 5 yrs.

niceguy · 05-24-2008, 11:12 AM

Thank you very much gents. It is such a joy to find your useful replies.

I am sooo sorry to forget mentioning that I have a tiptronic boxster. It seems that this job and its tools required are beyond my DIY ability.

Should I go and get an independent specialist to change my gearbox oil on my newly purchased 2003 Boxster (exactly 5-yr old) with 23000 miles on the clock? In addition, the previous owner had never changed the oil since new.

If the answer is yes, will it be a good idea to replace the RMS (Cayanne RMS part, as I read somewhere) together with the gearbox oil change to kill 2 birds with 1 stone?

Thanks again