I was driving fairly aggressively on the highway last night, manual shifting to help slow and then slapping back in drive, like I have all the time, but this time my Cayenne Turbo just lost all power in the middle of the interstate and I barely made it to the side of the road. I could not accelerate, or it would JUMP forward then nothing. I shifted back and forth without any changes. The RPM's would not go up much either, like I was taking off in 6th going 5mph or something. RPM's never shot up like something was slipping. I got off the road and let it idle. I crawled under the car and didn't see anything apparently looking wrong. I then got back in the car and it drove off normally, no issues at all? What happened????? Guessing the shifter got lost between auto and manual or something, but not sure. Maybe it flooded with gas after a shift error then sputtered off the road, but after idling, everything is fine? I checked the drive shaft at last oil fill 2 wks ago. Seemed perfect and noticed it was new from the previous owner. Any light on the subject that could steer me in the wright direction would be nice. I'll get the Diametric on her tonight and look for codes. Thanks in advance.

 

Oh crap. Now it is slipping with load. Hope the valve bodies are OK. I think I'll try a drain and fill, drive, then drain and fill again. What fluid is the best. 2004 Cayenne Turbo? Thanks
I can tell by looking that the tranny pan has never been removed and the drain bolt has never been touched. 90K miles. Probably has **** for fluid it there.

 

Hooked her up to the scanner and got no tranny codes, but did get engine codes P225 and P227. Engine is sputtering a bit at idle now and revs to only 4000 in park. I can't find what these codes mean. Anyone know?

 

This is a terrible forum. How come nobody ever replies on this site? The 996 forums will probably help more than this, but I would sure appreciate it if someone has any ideas.

 

Maybe maybe try posting in the model specific forum? Or over on RL as the older model P!gs definitely dominate the discussion there (and its more active than the 958 forum here).

No idea about your actual issue though. Sorry.

 

Defiantly do a drain and fill just to check that off the list. I have a 04 turbo cayanne too. Did a drain and fill last yr.

 

Yep, Just ordered the parts for pan drop and filter change too from Pelican. What ATF did you use? I'm thinking about Redline ATF-90?

 

I would go ahead and swap out the valve body if your doing to drop the pan. I had similar shifting issues and put a Revtech VB. It shifts like it should now.
There is a 955 sub forum that you should post in btw.

 

Not the tranny after all. My Left MAF went out. strange it caused those shifting symptoms and did not show a CEL. I'm still going to drop the pan and get all new fluid in there though. Just waiting for parts. I drove it for a few hours today and had no issues. Strange. I don't see the point of paying at least $700 on the valve bodies unless that is a problem. I don't really mind dropping the pan. Not a hard job.

 

It was the left MAF. Codes P2225 and P2227. Back to normal now. Strange it caused shifting issues.

 

Well, while a MAF probably wasn't cheap at least it was cheaper and WAY easier than a trans problem. Glad to hear it's solved.