Quote:
Originally Posted by The Radium King
you don't have an lsd - the psm is electronic (uses the abs to control traction).
the boxster uses a 'transaxle' which is a combined transmission and differential - flushing as per the pelican how-to does both. you will need 3 litres of fluid.
https://www.pelicanparts.com/techarticles/Boxster_Tech/38-TRANS-Manual_Fluid/38-TRANS-Manual_Fluid.htm
note pelican will also sell you the fluid ...
and pro tip - take out the fill plug first. you brick your car if you drain the fluid only to find out you can't get the fill plug out.
otherwise pretty much everyone will tell you to use the porsche fluid. i've used a variety of 75w90 fluids including motul and redline with no issues. if you want to do more searching, the porsche 996 uses the same 6-speed transmission and a lot more info out there for the 996. i think you'll find that the gl-4/gl-5 discussion is a bit moot since most of the high-end gl-5 gear oils have been engineered to no longer corrode the yellow metals in the transmission. |
Hey The Radium King, thank you so much for this reply and info.
This is really great info and super helpful.
I was thinking along the lines that maybe the gearbox and diff are combined since noone actually talks about filling the diff separately so thank you for clarifying. Also great to hear no LSD, I don't want that since I want a very traditional roadster which is why I bought this car. I don't even like the PSM and doing all the research on how to jumper it to disconnect but without throwing all the codes.
Great to hear about the Motul, coincidentally the main guy around here "the Indy" told me that he mostly uses Motul as well and no issues.
Since I'm a super OCD car owner and so by the book as in what the manual says, what should I do for oil? I don't mind paying all the extra to get the original GL4 porsche oil, happy to pay more for the original formulation. Or should I go with what the GL5 dealer stuff is being pushed now?
The one at Sunset is this one:
MobiLube PTX 75W 90 - Porsche (000-043-210-12-SP)
https://www.********************************************** **************************.com/p-mobilube-ptx-75w-90-4321012sp
I can call Pelican and see about the one that actually comes in the porsche bottle (the original GL4 formulation), but I think when I called them they said they won't ship oil cross border so I might have to go with the Mobil 1 Mobilube PTX.
Thanks again for the quick and informative The Radium King, really appreciate it!!