Does the 4 wheel drive system require a lot of maintenence?

[ninsei]

Hi. thinking of getting a 996. As for the Carrera 4 VS. the Carrera, what's involved maintence wise? I'm familiar with the VW/Audi Haldex system, is this the same? Cause that thing requires fluid/filter change every 20K miles.

[RFM]

Porsche use not the Audi system, the maintenance include only oil change at the indicated interval (depending MY see manual), there is no filter to replace.

[CosmosC4S]

I wouldn't say the C4S requires more maintenance than a C2. All I can think of the top of my head is maybe the front differential oil change, which you'd do probably once in your period of ownership. If you own it long enough, maybe twice.

It shouldn't be a deciding factor on purchasing the C4S.

[Xeattle]

I wouldn't say the C4S requires more maintenance than a C2. All I can think of the top of my head is maybe the front differential oil change, which you'd do probably once in your period of ownership. If you own it long enough, maybe twice.

It shouldn't be a deciding factor on purchasing the C4S.

What is involved in replacing the viscous clutch. I believe it is located in the front differential so i would think it would be an easy change out.

My 2000 C4 seems to not deliver front drive as much as I think it should. Today when I was stopped on hill on about an inch of snow I could not move forward. I got out and and had my friend try and accelerate but the rear tires would just spin and I didn't see either of the front tires even trying to rotate.

PSM was on so I'm not sure if i should have turned it off or if it even has anything to do with the viscous clutch.

I'm not sure what the definitive test for the C4 system is but i suspect at around 70,000 miles the viscous clutch starts wearing out and it's ability to transfer power tapers off.

Does anyone know how much a new viscous clutch cost?