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Transaxle Fluid Change

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I think it's time to change the Transaxle Fluid in my 5-speed my98 Boxster. I have found this site that explains the procedure but I am a bit puzzled on the choice of replacement oil. They suggest using a Synthetic like Swepco 201 or Redline 75W90. Does the 2.5L Boxster have a Limited Slip Differential or a Non-LSD? Has anyone any experience with the with these fluid choices? I would think that the GL-5 rating is best.


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No factory LSD was available for the Boxster. On a Boxster the transmission and transaxle are one - and they share the the same gear oil supply.

The article you reference is for a 968 - a front engine - rear transaxle car. A 968 is completely different than a Boxster. Use the transmission oil change DIY here as a better reference. On a Boxster you will need remove part of the rear support members to get access. General instructions are here.

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While some extol the virtues of the Redline Cocktail, I have a B&M shifter in my car and when I "upgraded" to the Redline oil, I didn't notice any difference. It still is pretty tight when cold - cold= 50F or less.

There is nothing wrong with the Redline fluid, I just don't know if it's any better than the factory stuff.


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