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Thanks, I checked out that thread. I think the consensus is to use porsche oil, or Revenol for the Transfer case.
But I can't find any info on the differential fluid. There was one entry on using any GL5 oil as it's an open diff. But I would like some confirmation before doing so.
I've read reports from several people who have used a standard GL5 synthetic oil with no ill effects in the diffs. It's what I'll be using when I get around to doing the job.
I've read reports from several people who have used a standard GL5 synthetic oil with no ill effects in the diffs. It's what I'll be using when I get around to doing the job.
Thanks for confirming. Autozone has Castro syntrax 75w90 LS for $2 a liter. I just bought 4. Hope that's enough.
For the rear diff, I'm not sure if there's a different diff oil/lubricant for the PTV equipped vehicles versus the non-PTV ones, since the PTV cars have the electronic locking diff. ??
I believe the Cayenne Diesel front differential requires about a liter and the rear differential requires about 1.5 liters. I plan to change both this weekend and will confirm. I've read the drain/fill plug torque spec is 27 ft/lbs.
UPDATE: today I changed the oil in front and rear differentials. The front took less than 1 liter, the rear a bit more than 1 liter. Bottom line 2 liters will do it with a bit left over. The oil didn't look too bad at 30K. I've sent them to Blackstone to get a base line.
Last edited by r553; 06-17-2017 at 03:49 PM.
Reason: added torque spec, update capacities
I believe the Cayenne Diesel front differential requires about a liter and the rear differential requires about 1.5 liters. I plan to change both this weekend and will confirm. I've read the drain/fill plug torque spec is 27 ft/lbs.
Thanks for the info. I'm going to do it soon. What gear oil will you be using?
If you look at post #7 above I'm going with the latest Porsche oil 00 043 305 04. Its about $65 a bottle at the local Porsche dealer with PCA discount.
Be sure to check if your car has a locking differential as that would likely take a gear different oil. My Cayenne Diesel has open differentials and uses this fluid. Since I'm still on warranty I'm using the Porsche fluid.
8 mm 3/8 stubby bit needed to tighten the fill plugs on 2015 CD
I learned today that an 8mm 3/8 drive stubby allen bit is needed to tighten the fill plugs on my 2015 CD differentials. To reach 27 ft/lbs you need a 3/8 torque wrench. My 1/4 inch torque wrench maxes out at 200 in/lbs ( 327 in/lbs is needed to get to 27 ft/lbs ). Doh.
UPDATE: I could not get the Williams 35608 3/8-Inch Drive 8 mm stubby bit so I got this from Tooltopia:
Front differential has a cross member forward of the fill plug limiting height of tool.
The rear differential also has a cross member running close to the fill plug.
Last edited by r553; 07-26-2017 at 09:22 AM.
Reason: added picture of stubby 3/8 metric bit set