It feels like it's going to explode! I've got to get this fixed under warranty.

I am doing a LOT of other work on her trying to get ready for the road and don't need any added trouble or expense.

I just hope the dealership will not take too long to figure it out and get the part.

Doing brakes, parking brake strut; tranny, diff and transfer case services, upgrading to aluminum coolant pipes, oil change and new tires and installing a Brake Controller--all prior to getting on the road and hauling a trailer around the country.

It'll look kind of funny I'm sure as this 16'4" SUV hauls a 25' wide body trailer down the road. I figure I'll be ~52 feet long.

I sure appreciate all the help on this one--as I near the end of CPO warranty on the 31st of August. When I should concurrently cross 100,000 miles.

 

gr8ful, Did all that work actually get done?

CTTinTO, are you able to live with the occasional abrupt shift?

 

Indeed I did! And made it down the Alcan but not without incident.

In Calgary my A/C went out and the cat started overheating viciously but no warning lights & no codes. So I sit here in Boise with my baby partially repaired. The dealer is, well, it's odd.

They replaced the A/C blower and charged it with freon. The A/C seems to be working fine. But they refuse to acknowledge the OVER HEATING problem. And they are resisting me when I ordered them to work on it and replace parts AT MY EXPENSE while it is still under CPO.

Porsche of North America has been nothing but Patronizing. They look for any excuse not to fix it and get me down the road safely.

When I was towing to Boise through the passes up grades, the radiator temperature went OVER the 3/4 mark of 220 degrees twice! The dealer blamed it on towing which is absolute Bovine Excrement!

I towed a HEAVY trailer from Phoenis to Anchorage with no movement of the temp needle off the dial, top dead center mark!

Moreover, when driving is a somewhat spirited fashion after 10 minutes when NOT towing she overheated in Boise and was just shy of that 220 degree marks at 3/4's way!

PCNA's customer relations rep made the excuse 'well, the weather in Boise has been rather warm.' She can stick it! I bought car and took delivery in summer in the HOT deserts of Arizona and drove her in the real Heat of Phoenix and she never did this!

I'll never buy another Porsche again. Certainly NOT a new one, not a CPO one. {I love it when the PCNA rep askes me if this is my first Porsche, has it been in an accident, has a non-Porsche dealer worked on it. This is my second Porsche. No accidents and never touched by anyone other than a Porsche trained mechanic except when I had a flat repaired. However, this is not to say there was always a trained Porsche mechanic at the dealership in Anchorage working on it. I don't know; they put the wrong oil in it once. The engine just sucked 0-30w Mobile One like it was water.}

WARNING: Porsche lied to me and lies today about their CPO warrantees. Porsche MISREPRESENTS their CPO warantee.

I replaced the plastic pipes at my own expense. Upon inspection the interior of the pipes had erroded and would have gone possible leaving me stranded on the remote Alcan Highway. She never over heated until after the aluminum pipe upgrade was done. The weird thing is how the over heating occurred when the A/C failed in Calgary.

However, I might buy a used one without benefit of warranty. Why? Because I take far better care of my cars than Porsche! Porsche will not perform the preventative maintainence to the level I will and do. I tend to keep my cars for nine years on average.

For instance, I use better oil whilst Porsche insists upon keeping to the sickly Mobile One.

Porsche of Boise Lyle Pearson claims they can't duplicate it and hence won't work on the over heating part--the most crucial part.

BTW, the ride down the Alcan was WONDERFUL. Drove from Anchorage towing a U-haul trailer to Kalispell in four days.

IMHO, the Alcan is the best Porsche drive in the world. But, don't do it one of these "modern" cars--you need to carry a spare tire.

Phoc Porsche.

 

I've learned to live with it. It is easily avoidable.... and only seems to happen when my truck is hot ie: 20+mins at least on the highway.

I will eventually fix it. I just have other priorities at the moment before spending the cash repairing this problem.

 

Transmission serviced By Morrison Autogroup Porsche of Anchorage, throttle body replaced under CPO warranty. :-)

She's a joy to drive again (when she's not over heating). Get that job done. It's worth it.

These cars (Turbo) are too powerful to place the rest of the transmission at risk. Replacement of transmission runs EIGHT BIG ONES!

 

Same issue here on the acceleration from 2nd to 3rd as a skip then slam.....

The only way to avoid this costly repair, which mine only appears internmittenly and I can change my habits to account for it, is to flip over to manual and upshift all the gears.

For anyone struggling with a severe problem before getting throttle body replaced.

I drive less than 10k miles a year now and never really hit above 40 mph.....

 

I have a 2004 Cayenne S that just hit 93,000 and it's been doing a subtle hard shift between 2nd-3rd, 3rd-2nd for a while, and I feel it's gotten a little worse so I'm taking it to get fixed finally. A guy at the dealership said it was most likely the valve body. From all of the things I've read on this forum and others, the valve body seems to be the issue. Has anyone on this thread had the problem fixed and what was the solution?

Thanks for any insight.

 

It took the throttle body replacement to change out a bad selenoid to fix mine. Now, it's great. I hope this isn't a part that is prone to persistent failure.

 

does anyone know if a new TCU is required when changing the valve body? i was looking at valve bodies from revmaxconverters.com

 

The best recommendation we have seen is to have it rebuilt, dont buy a newer one as they have a new portion.

 

Happened twice for the first time for me today. Once while driving down a curvy hill at around 30mph wasn't paying attention to the gear it was in. As I was slowing I felt a HUGE thump and I thought I ran over something or a tire popped. Kept moving forward and all was fine and smooth to be a popped tire.

Then on the highway driving about 60mph I was changing lanes and accelerated. HUGE thump again on the downshift. I thought something broken.

Anyone else run into this as well on their 955 turbo's?

 

I can't tell from this whether it's your cardan shaft or your transmission throttle body. The up shifts would be Explosive if it was the transmission and that part costs >$1700. But if you are lucky its the cardan shaft which costs $700. Neither of these include labor.


Cardan shafts tend to go between 60-80,000 miles and that is a vulnerability in these. So I am anticipating mine going again at any time.


Throttle body should be a one time fix. If that's it you might as well flush the transmission fluid and change the transmission filter while you are in there.

 

Had the rear drive propeller shaft replaced for $1,270 a few months ago.

I have been reading a lot about the valve body and hope that is the cure. Going to monitor how often the clunking occurs moving forward after these two occurances. Two times today...once after a few minutes of driving going down hill decelerating and second time accelerating and speeding up at highway speeds. Both times it seemed like it was from the down shifting....

I had the transmission fluid and filter replaced about 3 years ago. How often should the transmission fluid be replaced?