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Old 08-13-2007, 11:35 AM   #1
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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
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Old 08-13-2007, 11:54 AM   #2
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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.
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Old 08-13-2007, 12:05 PM   #3
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I put in Royal Purple yesterday and I'm loving it. It's much better than the MT-90 I had been using.
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Old 08-13-2007, 12:25 PM   #4
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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?
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Old 08-13-2007, 12:47 PM   #5
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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
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Old 08-13-2007, 12:53 PM   #6
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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.
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Old 08-13-2007, 01:25 PM   #7
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Quote:
Originally Posted by Schnell!
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?
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Old 08-13-2007, 03:53 PM   #8
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Ah, I didn't catch on to the 6 speed part of the discussion.

I use this Hand Pump.

Quote:
Originally Posted by Schnell!
The previous two posters, kabel and blinkwatt, both have 5-speeds.
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Old 08-13-2007, 04:27 PM   #9
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Quote:
Originally Posted by kabel
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.
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Old 08-14-2007, 06:00 AM   #10
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Redline 75W90NS in my 6-speed. Fantastic in my opinion, and what is recommended by Redline.

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Old 08-14-2007, 08:28 PM   #11
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Originally Posted by bmwm750
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.
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Old 08-15-2007, 06:47 PM   #12
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Quote:
Originally Posted by trogdor
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"?

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