Go Back   986 Forum - for Porsche Boxster & Cayman Owners > Porsche Boxster & Cayman Forums > Boxster General Discussions

Reply
 
LinkBack Thread Tools Display Modes
Old 01-15-2008, 09:03 AM   #1
Registered User
 
Join Date: Feb 2007
Location: Oregon
Posts: 118
Post Redline in a 6-speed for cold morning shift improvement, "test" results

Have used redline in other cars and it has made a vast improvement so I tried it in the Boxster 6 speed (73k miles) to improve cold morning shifts.

1) 75% redline 75W90NS, 25% stock fluid (not 100% because I pumped and filled via fill hole to save time) - Cold shifting improved immediately, notchiness in all gears increased

2) 90% redline 75W90NS, 10% stock - better cold shifts, more notchy all gears

3) 60% redline 75W90NS, 40% redline MTL (70W80) - about the same, maybe a bit more notchy

at this point I was very uncomfortable with the notchy shifting so I went back to 100% stock fluid

4) 100% stock. Surprisingly, cold shifting is excellent. Am very happy with lack of notchiness in all gears.

Conclusion: For this particular car, the stock fluid was much, much better than redline. So if you have cold shift stiffness on a 6-speed, I would recommend changing out the fluid and refilling with the stock fluid. It worked very well on this car anyway but I know others have had very good results with redline.

Last edited by saaber; 01-15-2008 at 09:15 AM.
saaber is offline   Reply With Quote
Old 01-15-2008, 10:22 AM   #2
Registered User
 
Join Date: Nov 2007
Location: Portlandia
Posts: 53
Thanks for your experience. We see the notchiness in 2nd and 3rd on cold mornings.

My indy doesn't like to change fluid so I am thinking of doing it on my own.

Where are you at in Oregon? We certainly had a chance to test in the cold today! Heck I got to test the limits of traction on my way to the office this morning!
__________________
life is participation in evolution
87 944 PRO44 racer. 01 986S (race build in progress), 93 968

Last edited by schwank; 01-15-2008 at 10:29 AM.
schwank is offline   Reply With Quote
Old 01-15-2008, 10:32 AM   #3
Registered User
 
Join Date: Feb 2007
Location: Oregon
Posts: 118
Quote:
Originally Posted by schwank
Thanks for your experience. We see the notchiness in 2nd and 3rd on cold mornings.

My indy doesn't like to change fluid so I am thinking of doing it on my own.
I see you are in Portland. Ever use A and P specialties? I have never used them but I hear they are the ones to go to.? Marque Motors I have found is no cheaper than the dealer, but I hear they are knowledgeable as well. You don't want to know what Sunset Imports charges for a tranny fluid change ha ha but Justin there really knows his stuff I think. He suggested maybe upgrading to the newest 911 shifter which is awful tempting. Apparently it shortens the throw a little and it is more precise. I wasn't sure if he was talking about the plastic portion that the shifter goes into only or the whole shifter.
saaber is offline   Reply With Quote
Old 01-15-2008, 01:12 PM   #4
Registered User
 
HammerESQ's Avatar
 
Join Date: Oct 2007
Location: Washington DC
Posts: 88
Thanks for adding to the discussion. I have been researching changing the fluid in mine to solve a notchy 1st to 2nd on a cold morning. What was the stock fluid? Mobil 1 or something I need to pickup at the dealer?

Thanks,
Eric
HammerESQ is offline   Reply With Quote
Old 01-15-2008, 01:26 PM   #5
Registered User
 
Join Date: Feb 2007
Location: Oregon
Posts: 118
Quote:
Originally Posted by HammerESQ
What was the stock fluid? Mobil 1 or something I need to pickup at the dealer?
The part number on my receipt says:

4 000-043-304-71-SP TRANS OIL

So with a bit of research you can probably find a source for it (I couldn't and just had dealer change it). Here is another place to look...

via tholyoak on this forum:

"999 917 546 00 Shell (Transaxle) - 1 liter container

Check out renntech for more details

http://www.renntech.org/forums/index.php?showtopic=7060
__________________
1999 Boxster 3.6X51 Ruf 3600 Clone
1984 944 Original Owner"

Last edited by saaber; 01-15-2008 at 01:46 PM.
saaber is offline   Reply With Quote
Old 01-15-2008, 01:38 PM   #6
bmussatti
Guest
 
Posts: n/a
Saaber, good post.
  Reply With Quote
Reply


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -8. The time now is 01:52 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Pelican Parts Website -    DMCA Registered Agent Contact Page