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Old 08-13-2007, 10:02 AM   #1
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Join Date: Jun 2006
Location: Santa Barbara, CA
Posts: 34
Notchy shifting AFTER going to Redline Fluid?

Hi guys,

I just changed my trans fluid to Redline MT-90 and it has suddenly become more notchy. The shift itself doesn't feel bad, but the engagement between gears seems really notchy. Almost as if the synchros are having issue. Once I get past the initial effort, the shift feels great. Anyone have this happen immediately after changing their trans fluid? Only thing I can think of is that the redline is too slippery for the synchros to properly engage, although I've never had this problem in any other car (nor have I heard this as being an issue in the 986S box). BTW, this was several hundred miles ago on a 986S 6-speed box. Thanks guys.

-Tom
'01 986S

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Old 08-13-2007, 11:06 AM   #2
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Join Date: Nov 2006
Location: Anchorage, AK
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Your assumption is absolutely correct!!!

I've been running MT-90 all summer and have hated every shift since I put it in. My initial goal was better cold performance, which I got, but the overall performance is poor. It is too slippery.

Just yesterday I switched to Royal Purple 75-90 with a little Synchromax to top it off. It's about 1000 times better. In fact, it's almost as good as a 5-speed.

If you're dead set on staynig with Redline, I've heard the Shockproof oil is better suited to our transmissions.

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