What kind of gear oil are you running?
 

I've been a huge fan of Redline products for some time now, but this is the first time I'm having an issue. I just changed my 986S' 6-speed gearbox oil to Redline MT90 and I think it is too slippery for the synchros to properly engage. Shifting is very notchy. Once you get past the initial effort, it feels great. Is anyone else running a synthetic fluid, redline or otherwise, that works well in these cars? Please let me know what brand/type of fluid and what your impressions are on the shift quality. Thanks guys,

-Tom
'01 986S

I use Royal Purple gear oil and report slightly smoother shifting but thats it, other than that, it feels close to the same as the mobile1 gear oil it had.

I put in Royal Purple yesterday and I'm loving it. It's much better than the MT-90 I had been using.

Redline MT-90 has been in my car for 6 months,no complaints.

IT WAS A PAIN IN THE ASS TO POUR IN THOUGH.

Perhaps you didn't put enough oil in there,could that be it?

I just had the gear oil changed with the rest of the 90k service decided to try the redline, I have noticed no change in shifting characteristics. I'll flog it a bit on the way home this evening and see how it feels :D

The previous two posters, kabel and blinkwatt, both have 5-speeds. I had a 5-speed back in 2004 and it shifted like butter no matter what oil was in it.

I really miss the 5-speed, but the Royal Purple has gotten my 6-speed closer in shift quality of late. The Getrag unit is awefully particular about what oil goes in.

Blinkwatt, I used a small hand pump available at any local auto parts place. It screws right on to the bottle and makes filling a snap.

Do you have a pic of what this pump looks like?

Ah, I didn't catch on to the 6 speed part of the discussion.

I use this Hand Pump.

Awesome! I will keep that in mind when I change the 996s tranny oil. It was such a pain transferring the oil to a smaller container and forcing it into position to pour in on the Boxster.

Redline 75W90NS in my 6-speed. Fantastic in my opinion, and what is recommended by Redline.

Patrick

I have just recently read about this recommendation (maybe here) and then in the last grassroots motorsports mag there was a redline ad specifically stating that this was the type to use in Porsche transmissions because of the design/clearances of components. The NS part is important apparently.

I think the "NS" is "non-slip"?