Rear locking diff standard?
 

I'm guessing not.. thought I'd check the action of the off-road stuff. Locks the center diff fine. Locks the front diff fine. Does nothing with the rear. Looked in the manual figuring maybe it was a fuse. Fuses 22-23 in the left drivers door panel are the rear differential lock - no fuses there, and no wiring for the fuse in the fuse box..

Whatta' surprise.. :(

you need the Off Road package for that

Ah ha.. so I guess I just have the.. mebbe "light snow" package.. :)

Thanks!

I highly doubt you have a locking front diff, the first LED is the low range. I've seen only a couple of cayennes (and those were highly modified for off road) w/ locking front diff.

second light locks the central differencial 50:50 front-rear, third light locks the rear. The third light will still light; albeit, it is not actually locking anything if you do not have the offroad package, as pointed out. It just pretends. As lopo says, the Cayenned does not have a locking front. I believe only the Subaru STi, MB G-wagen, Powerwagon and Rubicon offer this? Anyone???

I can confirm rear locking was not std - was just in Colorado & Utah and only got the second light, 50:50 distribution. I checked the sticker and locking rear diff was not listed, so it must have been an option. I just picked up an '08 GTS.....I'm genuflecting in the general direction of Porsche engineers. Incredible on/ off road flexibility in on vehicle.

you forgot touareg W12 and V10 TDI. and voila, using a wrench and a screwdriver, you can have it on your cayenne as well :)

Correct you are - I mistyped.. :bowdown:

Centre diff lock plus rear diff lock option code is I1Y1.
Takes the guess work out of it.

As bigbuzuki pointed out the rear diff lock option code is I1Y1 and my '06 Turbo S has this code where my old '05 Turbo had the code I1Y0 which comes up as 'Without differential lock', so I guess they want you to know it even if you don't have it.

Just looked mine up: http://www.autoatlanta.com/life/vin/...AB29P16LA70378 - I1Y0 shows up with no explaination..

Try this one for options codes.
http://www.docstoc.com/docs/54356085...ion-codes-list

Care for an explanation? The locking diff can be dropped in to the rear that easily?

-Dana

not only the rear, but the front as well. yes, it's that easy, they fit 100%.
we did it on a Q7 V8 4.2tdi which does not have a low range and any locking diffs, just limited slip center diff (torsen). low range is not an issue with 740lb/ft torque, but locking diffs front and back made a huuuuge difference. the only drawback is that we were not able to find any way of controlling the difflocks using factory switches, so we installed small switches in the center console armrest.

same goes for cayenne, they are identical twins (triplets actually :-) ) when it comes to diffs and such.

I can post some pics, but will have to ask my partner to send them to me and he's somewhere in UAE right now so you'll have to wait a couple of weeks.

Sounds cool. The locking rear diff is the only option my CTT doesn't have that I want.

Why? Because a Rubicon has it. A toyota truck has it. An FJ cruiser has it.

I did not realize that a locking front diff was ever offered...

I look forward to the pictures.

-Dana