Transmission Flush

[chitowndad]

Thanks Kirk,
Ah crap, I ordered that tool and it comes in like 1-2 days so that was pissing $20 down the drain!

Oops.

-Steve

[roadracer311]

I changed the tranny oil on my 2003 Boxster S when it hit 20k miles in October of 2007.

I work on motorcycles for a living and often get to see what break-in oil looks like coming out of a bike. (it has sort of a pearly look to it from all the tiny metal bits). So, I thought it would be good to get the original stuff out of there in spite of the 90k mile service interval, just to clear out any of the metal that comes off as the gears sort of wear-in to each other.

I did a ton of research and ended up using Redline 75W90 NS. The shifting feels the same as before. Possibly a tiny bit better, but definitely not worse. (Having raced motorcycles for 5.5 years, I'm fairly sensitive to small changes in the vehicles I drive/ride. )

Before and after the oil change, the best thing I've found to keep it from crunching into 2nd gear is to make the 1st to 2nd shifts at 3k rpm until it's warmed up.

[chitowndad]

So the Redline 75W90 NS is a GL5 and the 75W90 MT is a GL4 oil. How big of a difference is the GL4 verses GL5?

-Steve

[chitowndad]

Thanks for the offer Lil Bastard but it just means I don't tell the wife and I don't buy lotto tickets one week! LOL ) I may put it on ebay, some day...

-Steve

[Cloudsurfer]

My understanding is that GL4 is not so good for gearboxes with yellow metal in them. I am not sure if the Box S does or does not, but I have been running 75W90NS in mine with great success.

I don't think any fluid will make these boxes shift like butter when cold, but I certainly don't think its any worse than stock with the 75W90NS and I'm inclined to think its a better lubricant than the OEM stuff.

[Kirk]

Originally Posted by chitowndad

Thanks for the offer Lil Bastard but it just means I don't tell the wife and I don't buy lotto tickets one week! LOL ) I may put it on ebay, some day...

-Steve

Eh... just throw it in your toolbox. You'll probably need it someday for a different car or a friend's car. It's not like the tool is going to go bad or anything. I've got lots of tools that I barely use, but then the one time you need it... well you need it!

Kirk

[FTD]

Originally Posted by roadracer311

I changed the tranny oil on my 2003 Boxster S when it hit 20k miles in October of 2007.

I work on motorcycles for a living and often get to see what break-in oil looks like coming out of a bike. (it has sort of a pearly look to it from all the tiny metal bits). So, I thought it would be good to get the original stuff out of there in spite of the 90k mile service interval, just to clear out any of the metal that comes off as the gears sort of wear-in to each other.

Is there a 'pan' for the transmission oil, whereby it can be dropped and the area around the magnet that is supposed to catch the metal particles can be wiped clean?

[Lil bastard]

Originally Posted by FTD

Is there a 'pan' for the transmission oil, whereby it can be dropped and the area around the magnet that is supposed to catch the metal particles can be wiped clean?

There is for the Tiptronic - 4 magnets are placed in the pan to catch any shavings. If you pull the pan, you need to replace the gasket too.

But for the Manual, there is no pan, only the transmission case w/ drain/fill plugs. The magnet is in the drain plug.

[Lil bastard]

Originally Posted by chitowndad

Thanks Kirk,
Ah crap, I ordered that tool and it comes in like 1-2 days so that was pissing $20 down the drain!

Oops.

-Steve

Hey, sorry for the bad advice! I should'a looked more clearly and seen you had a 6 Sp. Tell you what, see if you can sell it in the classifieds and if not within 2 wks., I'll buy it from you to square things even though I have a TipS...sorry again!