Advice for a 75w90 transmission oil

[heiwaz]

Hello, I want to change the transmision oil of my 986s G68/20 gear box. In the workshop manual recommend 75w90, but I don't know with oil to choose, I was thinking in "Motul gear 300 75w90", that is API GL4, GL5.

What do you think is the best choice for my gear box?

[winders]

This should be asked in the "Boxster & Cayman Forum". This is the air-cooled 911 forum.....

Scott

[JFP in PA]

Originally Posted by heiwaz

Hello, I want to change the transmision oil of my 986s G68/20 gear box. In the workshop manual recommend 75w90, but I don't know with oil to choose, I was thinking in "Motul gear 300 75w90", that is API GL4, GL5.

What do you think is the best choice for my gear box?

We spend an inordinate amount of time draining just about every brand of after market gear oils out of Porsche gearboxes in one failed experiment after another. Every time, the customer comments are the same: Poor shifting, stiff, noisy, etc.; and every time the results are the same: The problems go away as soon as the OEM product goes back in.

A lot of small time lubricant blenders claim they can match the OEM product, yet the major players in the lubricant markets say they have no direct match for Porsche’s product, which has unique characteristics and is made by a small specialty manufacturer, and has no GL or other recognizable specs, but is a full synthetic product and obviously works well in these transmissions.

[nosnow4pc]

I have Motul in mine and 200 miles into the change I started getting a whine. I'm going to switch back to Porsche fluid at my next oil change.

[heiwaz]

I found this oil transmission in pelican store, please can you confirm this is the right oil I need for my 986s manual. Is this the porsche fluid?

999-917-546-00-M862


Porsche Boxster Transmission - Page 4

[JFP in PA]

None of them are correct; the first two are ATF for a Tip, the last one is for the diff on a Tip...............

[heiwaz]

Originally Posted by JFP in PA

None of them are correct; the first two are ATF for a Tip, the last one is for the diff on a Tip...............

So, what is the correct oil? Please can you send me a link to buy, or the exactly name, I would very grateful

[JFP in PA]

Part number is 999-917-546-00; we get it in drums from a Porsche dealer. They also sell it by the liter as well. There is no aftermarket source for this, it is dealer only...............

[heiwaz]

thanks. I search at pelican webstore and it appears the same ref. but adding M862. I think is the same (titan sintopoid)