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Old 04-15-2021, 04:34 PM   #1
2004 Boxster
 
Join Date: Jul 2020
Location: Eastern Canada
Posts: 26
Quote:
Originally Posted by Vtx531 View Post
Drained and filled my 5-speed gearbox earlier this week. I used full synthetic Walmart Supertech gear lube 75w90. Sorry to say it does seem to be tougher/notchy to shift in cold weather when first starting out. It was about 40 degrees today when I noticed it.

Anyways, what is with Porsche saying 11mm below the fill hole? I tried the little bent paper clip routine and had a hell of a time getting it right. I think I got it but not 100% sure. Since 11mm is hardly anything - anyone ever just fill it until it spills out? Catastrophic failure??? Why didn’t they just locate the hole 11mm lower?
I also changed mine last week. I bought 3 liters of the VERY expensive Porsche transmission oil...Just because of the cold shifting issues that some folks here experienced. I went with factory stuff.

Fortunately, I have a friend that works in a repair shop that ordered it for me and got 15% discount.

I had bent a paper clip and scratched the metal for 11mm to emulate a dipstick. Wasn't perfect. I ended up measuring precisely 2,25 liters and poured it by gravity, using a tube & funnel. After I measured with the paperclip, it was about right. Could also touch the oil with my pinky finger...Felt secure. Closed it up. Shifting was fine after that.

Don't know about overfilling issues. I also questioned it a bit but figured that they must have had a reason to specify the level. So I just blindly followed directions.

And saved a few drops of the expensive liquid in the process :-)

I now have a 0,75 L leftover with little use for it .
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Old 04-15-2021, 04:53 PM   #2
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Join Date: Aug 2019
Location: Mi
Posts: 69
Me too. I try not to go against the engineers. They know what they are doing and there is a reason for everything they do.

Maybe the 11mm lower level is some sort of a correction for something they found out after the transmission was already designed?

Maybe I can find three other people with .75qt leftover to send me and combine them all.

Looks like the 6 speed is supposed to go to the bottom of the hole so I think you are good Htci
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