[FlyPenFly]

Any updates? I'm about to try the same at my local dealer 😓

nope, the reverse thumping is specifically called out by Porsche as not a warranty item.

 

[michaelalex17]

I apologize if this has been answered, but has anyone had issues with their transfer case AFTER getting the revised 95b-341-010-ax unit? I got this transfer case installed under warranty a few years ago and haven’t had any issues, but am curious if other have or if this was an actual solution from Porsche.

 

[TS Macan_911]

I apologize if this has been answered, but has anyone had issues with their transfer case AFTER getting the revised 95b-341-010-ax unit? I got this transfer case installed under warranty a few years ago and haven’t had any issues, but am curious if other have or if this was an actual solution from Porsche.

I dont understand your question? If it sits in a Porsche, it is a Porsche solution…

 

[Smike]

OP is asking if Porsche released any details on the TC revision numbers that lead us to believe they have corrected (and found) root cause of TC service life issues.

 

[AoxoMoxoA]

The current part number being offered on several Porsche parts sites is 95B-341-010-PX, and replaces the following:

95B-341-010-AX
95B-341-010-LX
95B-341-010-X

So, it appears subsequent revisions continue to be produced.

 

[michaelalex17]

Interesting. Have there been any reported failures with the AX or now PX revised part?

also @Smike that is correct, sorry if my initial wording wasn’t clear with the word solution.

 

[signde]

2015 Macan Turbo, 75k miles. I purchased it at 70k in Spring 2023, fully aware of potential TC issues and that I am beyond the warranty extension.

About 2k miles ago I started to notice judder at low speeds ~10mph and low speed full clock turns. Was quite sure it was the TC. My local indie shop ran through the steps in TSB 132/17 and confirmed.

The sourced part to be used for replacement is 95B-341-010-PX. I asked them to check the number on the existing transfer case which I assume has never been replaced as I have all service records going back to 2017. If it turns out to be one of the replacement part numbers I will report back but I doubt it will be.

I purchased a warranty from Freedom through the rennlist forum sponsor Hi Line Autos. Will submitting a claim for the TC parts and labor to them. Will also report back if I run into any trouble there.

 

[michaelalex17]

2015 Macan Turbo, 75k miles. I purchased it at 70k in Spring 2023, fully aware of potential TC issues and that I am beyond the warranty extension.

About 2k miles ago I started to notice judder at low speeds ~10mph and low speed full clock turns. Was quite sure it was the TC. My local indie shop ran through the steps in TSB 132/17 and confirmed.

The sourced part to be used for replacement is 95B-341-010-PX. I asked them to check the number on the existing transfer case which I assume has never been replaced as I have all service records going back to 2017. If it turns out to be one of the replacement part numbers I will report back but I doubt it will be.

I purchased a warranty from Freedom through the rennlist forum sponsor Hi Line Autos. Will submitting a claim for the TC parts and labor to them. Will also report back if I run into any trouble there.

Thanks, I appreciate it! Really curious to see if anyone has the AX part replacement and has run into issues with it down the road. I checked back in my records and I got that part in April of 2020. Knock on wood haven’t had any issues, but I feel like if Porsche came out with this PX revised part that they must have determined the AX didn’t fix the issue.
Good luck with the claim, hope it goes smoothly (pun intended).

 

[signde]

Thanks, I appreciate it! Really curious to see if anyone has the AX part replacement and has run into issues with it down the road. I checked back in my records and I got that part in April of 2020. Knock on wood haven’t had any issues, but I feel like if Porsche came out with this PX revised part that they must have determined the AX didn’t fix the issue.
Good luck with the claim, hope it goes smoothly (pun intended).

I had a lot of free time over the holiday and skimmed through all 58 pages of this thread since I wanted to understand the cause of the failure and the part numbers for the replacements.

Early on there were folks who had multiple replacements but these were before the transition to the A/AX replacements.

There has been one person in here who had an AX replaced, but IIRC it was rather soon ~2k miles and not because of the original symptoms. That person was deemed to have received a defective replacement transfer case.

I can't recall reading any others in this entire thread. This is just one of many threads on this subject in this forum though, so don't take that as definitive answer on the matter.

The A/AX part numbers have been around since mid 2018 so even if they are failing, it would seem it's at a very small rate.

 

[oqjnLu@>@W]

Good observations!

I concur - I cannot recall but that single instance noted above where an AX unit failed. Considering all of the many, many
thousands of Macans on the road and the relatively, still rare, occurrence of transfer case failures in the 95B.1 models (despite
how it may appear in an enthusiast forum!), the AX replacement units, so far, appear fo be "bulletproof".


Would it be correct to interpret the failure in the 95B.1 range to have been caused primarily by the vent tube design, resulting in
water, etc. (dirt? particulate?) contamination and degradation of the lubricant in the case?

Thx!

 

[michaelalex17]

Great info, thank you all! Am curious why Porsche made another revised part in the PX unit if the AX TC functioned properly.

 

[Teddis]

Great info, thank you all! Am curious why Porsche made another revised part in the PX unit if the AX TC functioned properly.

This would be good to know. I have an AX case , replacement .

 

[FlyPenFly]

So how important is it really to reset the wear indicator if you do the TC fluid change?

 

[signde]

Good observations!

I concur - I cannot recall but that single instance noted above where an AX unit failed. Considering all of the many, many
thousands of Macans on the road and the relatively, still rare, occurrence of transfer case failures in the 95B.1 models (despite
how it may appear in an enthusiast forum!), the AX replacement units, so far, appear fo be "bulletproof".


Would it be correct to interpret the failure in the 95B.1 range to have been caused primarily by the vent tube design, resulting in
water, etc. (dirt? particulate?) contamination and degradation of the lubricant in the case?

Thx!

I gleaned two problem areas from this thread that I saved to my notes.

The fundamental problem is the viscosity of the oil in the transfer case that made the clutch plates grabby. It was being highly affected by moisture from a poorly designed vent tube.

Apparently, "Gas nitrocarburizing (GNC)" is now used to coat the clutch plates on the new transfer case. The new transfer case requires that new software be installed in the transfer case control module specifically for the new model. The "Gas nitrocarburizing (GNC)" supposedly strengthens or reinforces the clutch plates.

The TSB for this was released in April of 2018. New Macans started shipping with the updated TC in March of 2018. The A part number was discontinued in 2022. The L part number seems to have transitioned to the P part number sometime last year. I found no information as to the reasoning for the recent part number changes.

 

[VAGfan]

I don't think the vent tube design (letting moisture in) is the issue of the Macan Transfer case. This was just 'cross-talk" from the discussions of the Cayenne Transfer Case failures, where the vent tube was changed by Porsche to eliminate water entry. The Macan Transfer Case is a completely different design that what the Cayenne has.

The Macan Transfer Case issues are just that the original design clutch plates are not durable enough, so they added the GNC surface treatment in the March 2018 update.

Concerning the reset of the wear integrator parameter when the fluid is changed, I don't think that really does anything, except keep approximate track of the fluid degradation, as Porsche uses that statistic to determine when the fluid should be changed. I don't think that the value of the wear integrator has anything to do with how the Transfer Case Control/actuator module "behaves".

 

[Teddis]

@VAGfan , There is an "Angle Learn" procedure after fluid change in the Trans Box . what exactly does this do ??

 

[VAGfan]

I would guess that it learns the initial clutch engagement "kiss" point, which is the angular position of the actuator motor shaft. I don't know how important this is, after a fluid change. Probably more important after the Transfer Case clutches have significant wear, so that the control module can learn the new kiss point. I suspect if you change the fluid often, the wear will be minimal, reducing the need to do the Angle Learn.

 

[FlyPenFly]

I would guess that it learns the initial clutch engagement "kiss" point, which is the angular position of the actuator motor shaft. I don't know how important this is, after a fluid change. Probably more important after the Transfer Case clutches have significant wear, so that the control module can learn the new kiss point. I suspect if you change the fluid often, the wear will be minimal, reducing the need to do the Angle Learn.

I might be imagining it, but starting off from a stop at a red light seems a little bit rougher after my fluid change. Although the fluid change fixed my “off road mode reverse sharp steering angle slow grinding noise”.

 

[sduggs95]

Hey Everyone - been following this thread for a while and finally it was my turn this week for the replacement.

My invoice shows 95B-341-010-PX on the paper work. However today when I got under the car to do some work, I noticed the part sticker had no "X". The sticker showed: 95B-341-010-P.

I am thinking maybe they put a brand new one in actually but wanted to see if any members who have a "X" part have a picture of their part sticker or know if their part sticker has the "X" to match the invoice.

My thought is maybe the part stickers between new and remanufactured are the same.

 

[signde]

My transfer case replacement is complete. Car drives smooth as silk now. My transfer case was indeed the original, dated November 2014. It took them a while because they sent out an inspector to validate before paying out but Freedom did indeed pick up the tab, covering everything but the sales tax. I am now in the black on that warranty purchase in less than a year of ownership.