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Old 02-26-2016, 06:06 AM
  #16  
mtnrat
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Originally Posted by kjbu
Last summer I changed oil in both differentials, transfer case and automatic transmission on my 2004. 3 of them had the same oil type. Easy change on diffs and transfer case. Felt the car got smoother after this.
Pilicanparts.com has very good guides how to do it.
Transfer case fluid is DIFFERENT than the diffs.
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Old 02-26-2016, 10:45 AM
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machisono
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Thanks everyone. I picked up a liter of Royal Purple 75w-90 last night. I trimmed a 8mm allen and opened the fill hole. I have a transfer pump and will fill later this morning.

thanks to all

joe
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Old 02-26-2016, 05:10 PM
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porschefan931
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Originally Posted by kjbu
Last summer I changed oil in both differentials, transfer case and automatic transmission on my 2004. 3 of them had the same oil type. Easy change on diffs and transfer case. Felt the car got smoother after this.
Pilicanparts.com has very good guides how to do it.
As mntrat said, the transfer case uses ATF but the diff's use oil. I changed all mine last year and the old fluid was nasty. I don't think i would be comfortable driving around too long with ATF in my diffs.
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Old 02-26-2016, 09:56 PM
  #19  
the flyin' scotsman
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Originally Posted by machisono
Hi Malcolm,
yes it is my transfer case. I have the equipment to replace the ATF. Is Valvoline Dex/Merc ATF acceptable. I used this to replace my ATF in the '91 C2

thank you
joe
Joe ............I would consult the owners manual for the correct oil and quantity.

My Cayenne '09 GTS has ATF in the transfer case and gear oil in the differentials.
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Old 02-27-2016, 01:20 AM
  #20  
cordsig79
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Fill it back up with spec..... Just had my diffs done at 180k miles.... Fluid didn't look too bad but fresh and smooth fluid in now.


Going to try it out tomorrow on some fire roads and pastures.
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