CTTinTO

noise is still there and hasn't gotten any worse so I've learned to live with it. Its really not that loud except now that I've "tuned" into it, I can hear it every time. I suspect it may be the front diff as well which is why I plan to change the diff oil at my next oil change interval. I also have a friend that works at the local porsche stealer and he is supposedly the resident Cayenne expert. Hopefully in the spring I can get him to take my CTT for a spin and give me his opinion.

are those Vicotr Equipment wheels? I have the Lemans wheels on my CTT and it uses wheel bolts that are different than the OE's - I beleive its a 17mm head and not a 19mm ohterwise I cant get a socket in to tighten the wheel bolts. What type of wheel bolts are you running? I wanted to get some spacers for my rear but I havent had much luck sourcing the longer wheel bolts with the smaller 17mm head...

looks nice! they look like Victor Equipment Lemans wheels.... what spacers you running on the rear?

based on the shipping costs I wouldn't buy it anyhow but I'm a little unsure if it would work anyhow. From what I have read in other threads, not all the head units have the connection at the back for this OE kit (possibly earlier Cayennes have this problem ie: 2004 MY) Does the Turbo have a different head unit that all support this OE system? Just curious. Thanks for the feedback guys. Mike

found this on ebay... http://cgi.ebay.ca/Porsche-Cayenne-factory-pod-adaptor-kit-brand-new-/120676004724?pt=Car_Audio_Video&hash=item1c18d9b374#ht_500wt_1156 I have an 06' CTT and my head unit CD player does play .mp3's on CD.... can I believe the seller and assume it will work? any recommendations?

scanned for codes yesterday and nothing cam up... on the good side, I haven't experienced the hard shifting since. looks like the problem may be gone. for now.

thanks for the tips wvicary

The check engine light is not on and no other lights are on the dash either. I will have to scan it this weekend to see if there are any transmission codes. My friend at the dealer told me that its 99.9% the valve body and is looking into the part cost for me. I drove it again today and could not duplicate any symptoms so I think I will sit on this one a bit longer before spending $2k+ on a very intermittent problem.

thanks for the feedback... I drove my CTT again last night and could not duplicate the symptoms. Mind you, it was a fairly short trip so I suspect it may act up when it is hot. I will have to keep an eye on it and report back. I also left a message with a friend of mine who works at the local P dealer. Lets see what kind of recommendations he gives me.

my otherwise super reliable 2006 CTT has finally started to show its true colors... While on my way back from picking up my parents from the airport, I experienced some real hard (and I mean HARD) shifting from 3rd to 4th gear after downshifting from 6th to 3rd gear. It happened several times and I tried again on my way home and it continued to do it. In any other gear, even under WOT it shifts very smooth and normal through all gears. Just on the freeway when cruising in 6th and flooring the accel pedal to get it to downshift i experience the hard shift getting out of 3rd gear. I guess my valve body is acting up? I was hoping that this was only a 04'-05' MY problem but I guess not. Has anyone had any luck with changing the transmission oil and filter? I have about 112,000kms now so I'm do for a trans fluid flush anyhow...

Acat2002 - do you know what length of bolt the sold you for the 23mm spacers?

The Cayenne suspension geometry along with wider "performance" tires makes the Cayenne very sensitive to road crown. If the vehicle drives straight on flat roads, then you are just experiencing road crown sensitivity and this is just normal. If your steering wheel is not straight but the vehicle goes straight the you just need a toe adjustment. I would look at a couple of things: Tires: This could be a tire conicity problem. Tires are coned shaped and tend to pull to one side by nature and in the tire industry, this is called conicity. At the factory, tires come in marked from the manufacturer as positive or negative conicity. At the factory they will then mount the tires so that the axle conicity cancels itself out. Sometimes the conicity is so high that it cannot be cancelled out. The way to check this is to swap front tires left to right and see if the vehicle starts to pull the other way. If it does, then its an axle conicity issue. Unfortunately, the consumer is not provided conicity data so you have to make due with tires you got and essentially guess the best position for each tire through trial and error. Some of the newer hunter RFB machines do measure lateral force and can help pick tires. Sometimes, also inverting a tire on the same wheel (if they are not directional) will invert the tire conicity to make it easier to cancel out the conicity of the tire on the other side. Alignment Check your camber split. Ie: the difference between left and right. Camber split = FRcamber - FLcamber. Example: FRcamber=-0.5deg & FLcamber=-0.2 so camber split is -0.7deg Typically, since road crowns in north america slope right, you want to keep your camber split negative. For the Japanese OE, we targeted 0deg to -0.5deg camber split and typically ran about -0.35deg split on average for a comparible SUV. On most alignment machines, they calculate camber split opposite of how I explained so be carefull when you look at the numbers and calculate it for yourself. My above calculation on a Hunter alignment machine would show +0.7deg and not negative. Either way, the key thing is to get the sum of the camber pointing towards the road crown to fight it. don't go to negative or you will find the vehicle going the opposite way on flat roads. Hope this helps Mike

I'll vouch for the quality and engineering of these vehicles. I used to be a test engineer for a Japanese competitor and the Cayenne is was one of our benchmarks for our luxury SUV and the Cayenne was a far superior vehicle at that time. The general consensus was that the Cayenne was "over" engineered which to me will translate to longevity. I would agree with most that if maintained regularly, there is no reason you cannot get at least 300k to 400k. Keep it.

awesome Loren - thanks for the clarification...

For the rear, both lower arms (on one side) have eccentric bolts. If you adjust both, you adjust camber. If you adjust one, you only affect your toe. For the front, I found eccentric bolts at the upper arm to body connections. Remember that you always adjust camber first and then toe. Camber change will majorly impact toe while a change in toe will minimally impact camber.

I have an 06' CTT and camber is adjustable at the front and rear - I'm 99% certain the case is the same for a Cayenne S Chances are the indy didn't know much about alignments or the Cayenne for that matter. Find a good alignment shop, preferably a shop that has "target" type alignment machine. ie: an alignment machine that is constantly taking pictures of the heads mounted on the wheels. Much more accurate than the old school laser types. A good alignment shop will know what you are talking about when you ask.

does the "wobble" go away after some driving? If these tires are relatively new to you, it could be that they are flat spotting over night. Michelin has had issues with flat spotting when tire diameters started increasing and in 06' developed a flat spotting spec/test. This spec of course is not very stringent and is highly dependent on the sensitivity of the vehicle they are going on. We all know that Cayenne's are very sensitive to tire inputs... Perhaps you could try bumping up your tire pressure for one day (to max indicated on the sidewall) and check the next day after parking overnight to see if the wobble still exists.

I would think its a driveshaft issue as well and not necessarily wheel balance. Wheel imbalance wouldn't cause a "wobble" unless it was REALLY bad and and the bad wheel assy would need to be on the front axle. In the rear, regardless of static or dynamic imbalance on the wheel assembly, it will only be felt as a high frequency vibration on the body and steering wheel but not shimmy which is sometimes described as a "wobble". The only other thing I can think of is a damaged wheel bore or improperly centered wheel.

the cats are yours - you tell me what is reasonable... I plan to gut them :) Most likely I will gut my own... I also have a local lead on a used set for $100...

for all of you out there that have converted to the cat by-pass pipes, is anyone interested in selling their OE cat's at a reasonable price?

sounds like you need to replace the struts...

Unfortunately (or fortunately) the battery was replaced early this year so I suspect that isnt the culprit. Thanks for the input though! anyone else?

The weather is now getting colder and I'm finding that in the morning when I start my 06' CTT, the instrument panel lighting takes like 10-15seconds to illuminate. Temperature this morning was around 5deg celcius and the same thing happpend. Has anyone ever experienced this? I was thinking that perhaps this has something to do with the headlights being in auto but I've already played around with the headlight switch in different positions and found no improvement. Anyhow, just wondering your thoughts on this. Mike

So after researching the honking noise I am experiencing when light - medium accelerating from stop, I'm pretty sure my problem lies with the diverter valves. I notice that my boost gauge hits about 0.7bar a WOT but quickly backs off and hovers around 0.5bar. As it shifts through gears it never hits 0.7bar again other than when launching in 2nd gear. I also notice that during hard acceleration there seems to be a slight hesitation - very minimal but once you tune into it, you can easily notice it. Can anyone confirm if they experienced similar symptoms when the DV's went? Also, whats the consensus on the best replacement DV's? WHats the best bang for hte buck? Audi TT plastic OE's or some billet aftermarket ones? I was contemplating ordering the billet ones offered by Suncoast....

sounds like the noise I have on my 06' CTT did you ever find out what hte noise on yours was???