Transmission fluid for LSD
#31
Former Vendor
For the 996 manual trans, I seem to sell a lot of the Fuchs and Liqui Moly, I'm a big fan of Motul myself for my cars. But you can't go wrong with any of those brands.
https://www.warehouse33auto.com/cata...al.Trans.Fluid
-Jason
https://www.warehouse33auto.com/cata...al.Trans.Fluid
-Jason
#32
Rennlist Member
I just bought this Porsche OEM fluid and will replace it soon: 000-043-305-49-OEM.
#34
Race Car
As a data point my car has a motorsport LSD the previous owner installed. It currently has 75/90 mobil devlac. I'll be renewing it next service with the same.
#35
More important than the brand of transmission oil ( anything that meets Porsche spec will be fine ) with a plated clutch limited slip diff is that you should change it more often than with an open diff transmission . Little tiny pieces of the wear plates and clutchs will be present .
Cheaper oil changed often ( especially with a track day car) is better than expensive oil left in there for years
Cheaper oil changed often ( especially with a track day car) is better than expensive oil left in there for years
The following users liked this post:
Ratchet1025 (02-17-2021)
#36
Rennlist Member
More important than the brand of transmission oil ( anything that meets Porsche spec will be fine ) with a plated clutch limited slip diff is that you should change it more often than with an open diff transmission . Little tiny pieces of the wear plates and clutchs will be present .
Cheaper oil changed often ( especially with a track day car) is better than expensive oil left in there for years
Cheaper oil changed often ( especially with a track day car) is better than expensive oil left in there for years
#37
Rennlist Member
For the street, That’s too frequently and wasting oil and money, but since you track the car, I think it depends on how you treat the lsd.
#39
Rennlist Member
And how does it shift?
I’ve read up on folks using different branded oils in leu of the Porsche factory fill, and I don’t think the factory fill is the only fluid that will work as intended. I’m guessing not all of these oils have the exact same viscosity as each other, so some oils might result in easier shifting than others at different temperatures with different tradeoffs. I tend to be gentle when shifting, so I could probably get by with an oil that’s more forgiving and easier to shift, whereas other folks that track their car’s light choose an oil that’s offers slightly better protection when hot.
#40
Rennlist Member
#41
Drifting
Bump. How's it shifting with Redline? I'm trying to decide whether to use Porsche, Motul or Redline in my '99 w/ LSD.
#42
Rennlist Member
Sorry for the delayed response. I would call it marginally improved across the board. No concerns here!
#43
Drifting
#44
Rennlist Member
Good to know. I replaced my fluid with Porsche OEM and it made little difference. So I’m guessing I need to adjust the shift linkages.
#45
Race Car
Previous owner confirmed my cars Porsche "motorsport" LSD is filled with Mobil 1 devalac 75w90 gear oil. Which I think OPC usually keep in stock.
Renewing it next service.
Renewing it next service.