I like to have "apex fun" in my Macan, but I have not experienced the symptoms you describe. Does the behavior persist after it warms up?

 

When I test drove mine the salesman demonstrated a full lock turn in the parking lot, emphasizing how smooth it was at how it followed a circle perfectly. So I don't think yours should do what you're describing.

 

Do you have PTV?

I notice it once each morning on my way to the office, especially if the road is wet. Happens where I have to make a sharp right turn at a stop sign and accelerate a bit aggressively onto a busy road.

I have long assumed it's the PTV doing it's thing as it reminds me of what a mechanical limited slip diff would do in the same circumstances.

Feels like the right rear wheel loses and regains traction a couple of times. Perhaps not what you are describing as you mention the front wheels.

 

No PTV mate. Definitely front end and on sharp rights.

 

No but the rear skipped on tight turns until I put the suspension in Sport mode and now it's all groovy.

 

Summer tires?

 

Ackermann

 

Ackermann

http://www.youtube.com/watch?v=XkzO-rHJUbI

I have definitely had that happen on my Turbo when I have the Conti 21 inch (N0 rated) summer tires on.

Does not seem to happen with the 21 inch Winter Scorpions (non N0 rated).

Happens first thing in the morning when I am maneuvering to get out of the garage and driveway.

Thought it might be an early sign of a failing transfer case, but maybe not.

Now that I understand exactly what we are talking about, I do recall from one of the Mercedes GLC forums that a number of GLC owners are upset about the same issue.

 

There is a definite lack of compliance in the Macan suspension both ends . It is most noticeable on the rear and on any bumpy road surface. It can be reduced quite a lot by reducing tyre pressures from the very high Porsche recommended pressures. I use 32PSI front and rear and would prefer 30PSI, but 30 triggers continual TPMS warnings. Give it a try in the circumstances where you experience the issues.

 

It's Ackermann. It happened with my Cayman. It does not happen with my Macan. My Cayman had summer tires. My Macan has all-season tires.

 

Thanks for the video grim. Does it have too little or too much Ackerman effect / counter effect?!

Looks like its a feature - wonder why it affects Porsches - have had Subaru AWD before and RR and they were all fine - not a 4WD thing?

Its REALLY unpleasant if giving it some beans out of a junction

Can anyone WITH approved N0 Latitude tyres and 21" confirm they get this too please?

Car has haa full 4 wheel alignment by a race guy so it can't be that - OMG so much better. [Took it there and he said' it's all in spec - give me 4 hours'! He knocked the front subframe over a few mil to get the front cambers equal, and got everything bang on perfect and matched each side - wonderful improvement]. I like my cars to be PERFECT - not this hop skip unpleasantness

 

Yes



I noticed the same symptoms you are expressing when I installed 21” Sport Classics with Michelin PS4 tires. Prior to installing this tire combo I had 19” Turbos with Michelin Latitude all season tires and never noticed this. This may be tied to stiffer sidewalls on the 21” versus the 19” tires but you can definitely feel a slight jerk in the wheel and not necessarily at a high speed. I would say it’s almost a skip in traction.

 

I noticed the same symptoms you are expressing when I installed 21” Sport Classics with Michelin PS4 tires. Prior to installing this tire combo I had 19” Turbos with Michelin Latitude all season tires and never noticed this. This may be tied to stiffer sidewalls on the 21” versus the 19” tires but you can definitely feel a slight jerk in the wheel and not necessarily at a high speed. I would say it’s almost a skip in traction.

It’s Ackerman effect. Also occurs on Panamera and 911. Discuss it with your dealer


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As others have said, Ackerman effect. Primarily caused by suspension design (improved handling / cornering) but tire compound, tire width, and outside temperature are also factors. Macan is very mild in this in my opinion - try a C7 Corvette with performance summer tires at 40 degrees. THAT will demonstrate Ackerman to you!!

 

Ackerman for sure, if at low speed on full lock, as demonstrated in the helpful video from @grim. Could also be a bit of understeer correction if you are carrying a bit of speed, which is "pushing" the front tires through the turn causing them to skip/shudder, particularly if you are accelerating and pulling weight off the front end through a corner.

 

Coincidentally just backed our M235 (with AWD notably) out of the garage (I also note that the OP has one, not sure with or without AWD) and got the same thing with the steering full lock to the left.

It's about 20 degrees (F) here and we still have the summer tires on (yes, the winters need to be put on, and it's on my to do list for tomorrow. 8 to 12 inches forecast here this weekend).

Felt like a bad CV joint, but I assume it's our friend Mr. Ackermann wishing us a good morning.

 

What is the Ackerman effect? I never noticed it on my Macans to my poor memory, but it happens on my current 911 and my prior one. I recall Nick Murray posting on YouTube that it occurs on AWD 911s which my first was. My current is RWD. I only feel it when backing out of my garage. I try not to turn full lock so it won’t happen.

 

Lots of stuff on the internet about Ackerman. There are better explanations than I can give.

It usually happens when you are maneuvering in tight places in cold weather with wide, cold tires. It happened all the time when I was driving a Cayman with 20" wheels. It has not happened yet with my Macan.

 

I have this on my New conti 21''s
I have only ever noticed when backing out of my garage, slight decline, on close to full counter clockwise lock.


This used to also happen on my Infiniti FX50s, also had 21's, factory.

There iS another thread....on another forum.....where by someone had their TX case replaced due to this though.....

 

Imo

I have this on my New conti 21''s
I have only ever noticed when backing out of my garage, slight decline, on close to full counter clockwise lock.


This used to also happen on my Infiniti FX50s, also had 21's, factory.

There iS another thread....on another forum.....where by someone had their TX case replaced due to this though.....[/QUOTE

Transfer case was already replaced. This is definitely tied to the suspension and the stiffer side walls of 21” tires. Very noticeable as well when making a hard left or right with the car weighted to the front such as crossing lanes into a parking complex and slowing to enter shifting vehicle weight to the front suspension.

I don’t believe this is a problem as tire wear is fine and is just a trade off for the low profile tires. PTV I would think would make some difference if the effect was caused by the rear but in this case the effect is generated by the front tires IMO. :nerd:

 

+1 on possible bad transfer case as my S had that and service tech found a bad transfer case.

 

My 2016 Turbo started doing this about a month ago and it is really annoying. I called the dealer, who told me it was normal; probably the change in weather. I really doubt what he told me. My skip, hop, jerkiness happened at slow speeds and especially when turning. I have no warning lights appearing on the dash. I’d love to know what is causing this bad experience.

 

Google "Ackermann Effect" This not unique to the Macan, and not unique to Porsche. And it seems to be most pronounced when (but not limited to) using summer tires in colder temps.

 

Same garbage on my 2017 Turbo. What a POS.
Hanging a U turn and have this wobble, especially when "giving it" a bit feels like the wheel is gonna snap right off.

Unbelievable!

 

Same garbage on my 2017 Turbo. What a POS.
Hanging a U turn and have this wobble, especially when "giving it" a bit feels like the wheel is gonna snap right off.

Unbelievable!

You have 2 options, well, I guess technically 3 if you choose to just suck it up and accept it.
1. Quit missing your turns.
2. Google "Power Slide" and give that a try.

 

My Macan S with 19” summer tires never did the skip and hop. Again, it’s not cold here year round.

 

I did try to search this bump I might not have been using the right terminology. I have a 2015 macan s diesel. It was slowly been developing (getting worse) a shudder or popping around the front wheels when reversing on full lock. It feels like there is some skidding or jumping related to the wheels or drive train. I have always had a bit of noise when turning out of the driveway on full lock, but this issue is new and seems to be getting progressively worse.

I have replaced tyres maybe 6 months ago and a wheel alignment was done at that time. it required several mm of adjustment. tyre pressures are around 39psi when cold. the sound is intermittent, but getting more frequent, almost always a lot of the time, except when I have taken it to the mechanic!!

Has any one had the same problem? I am wondering it is related to the all wheel drive system, or tyre setup or ??

TIA .

 

From what i have heard, this is a test that the porsche dealers do to test the transfer case. Turn to full lock, and if it shutters hard, then its the transfer case!

I would switch out the transfer case fluid, and go from there.

 

Transfer case.


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Google "Ackermann Effect"

 

Hi all, couldn't find another thread here with these specifics.

17 Macan S, bought CPO w 50K mi about 9 months ago. No real issues.

Lately I've been noticing, at low speeds (like parking) when I turn the wheel sharply while rolling there is a shuddering almost like I'm going over a rumble strip or the tire is bumping up against the wheel well (it isn't). No vibrations or other handling issues at speed.

I'm paranoid about the transfer case issue, but this doesn't sound like that. Any thoughts? It's still under CPO warranty but I don't want to bring it in if I don't have to.

 

Do you experience this in both forward and reverse? It could be due to the Ackermann effect, which can be more pronounced on all-wheel drive cars. It also tends to be more noticeable when the pavement is slightly damp. You can Google it, and/or see the comments in the earlier thread linked below.

If it's only happening in reverse with the wheel turned sharply, then the transfer case becomes more of a possibility.

Does your front end hop and skip on tight turns?

 

Thanks, actually seems to only happen in reverse--I typically back into my parking space and I have to cut the wheel. I'll check Ackerman.