Suspension and Chassis LSD on maximum turn manouvers

[_Emma]

We kinda covered all this in the first page with others post.

It isn’t a defect, no, it’s a design flaw (or design consideration compromise is probably more accurate) but almost impossible to achieve. A more appropriate/different tyre choice would mean it would do it far less. It’s irritating more than anything.

Right, off to work to scrape my tyres across the road on a quarter lock

 

[Bigbruiseral]

As I'm always banging on about giving the right info out to people I should add my problems posted in this thread were not the diff judder that's been covered , my problem was a horrifying grinding noise lock to lock that's been recognised by Hyundai and has a TSB on the data base for it, just so it helps people in the future

 

[_Emma]

@Bigbruiseral chuffed that they got it sorted for you Is it worth putting the issue you had on the 'known issues' thread?

 

[Bigbruiseral]

to good to be true the car drives great detailed the car to find they have taken 2 chunks out of the rim on the alloys

 

[Crocoman]

to good to be true the car drives great detailed the car to find they have taken 2 chunks out of the rim on the alloys

This is becoming a common occurrence. When I got my two front tyres replaced by Kwik Fit the other week, I inspected the alloys afterwards and there were 2 small chips out the driver's side one. When you actually watch how aggressive these guys are when they are removing the tyre from the wheel, then you actually wonder how the damage is not more significant!

 

[Bigbruiseral]

im am livid , its bad enough the feeling you get when your the one whos the damage let alone someone else doing it, have asked them for a repair or replace

 

[J BOB]

im am livid , its bad enough the feeling you get when your the one whos the damage let alone someone else doing it, have asked them for a repair or replace

I feel Your pain! A few years ago, back when they used to use that really thick white stuff to lubricate the tyre onto the rim, I got tyres at a local place I'd been using since the eighties and they damaged the rim, but instead of owning up, the cheeky so and so's plastered the damage with the white gunk! as it was winter I didn't clean the car so didn't notice for about a week by which time I felt it would have been pointless going back to complain, they would only have denied it, never been back since! Its cost them thousands in lost tyre sales from Me alone and I tell anyone who'll listen not to use them

 

[sprintcup]

I am not 100% sure but it looks like Hyundai is using eLSD produced by BorgWarner. Their eLSD is technicaly LSD (clutch pack inside of diff) but it is not managed by torque difference but ECU what gets input from sensors thru CAN gateway. It also explains why it doesnt have 100% open mode and it will stay half locked even sharp turns and parking. If you are making slow sharp turn, your outher wheel is making longer distance than inner and if eLSD cant operate as a 100% open diff, there will be a cracking noise and inner rim tries to turn faster than required. It will also explain why turning circle of N is so bad (like Lancer EVO). Our rally Subaru has all mechanical differencial locks if we must make slow 90-degrees turn on road section, it sound always like something is going to brake down
As I wrote - I am not 100% sure about eLSD of N, but it looks like this at least for me.

Good info,

With N having a clutch pack in the diff will a slip modifier help in the oil, I've used this on my cars with plate diffs, never run with a BorgWarner eLSD I assume it's in the gearbox oil and not a separate unit or dry as this will be a serviceable part?
Not much info on line about them, they are used by VW as well, think I will be changing gearbox oil every 12month as well to be safe.

 

[epialthes]

I'm fairly certain that neither PDEN or JSN use the BorgWarner FXD (which is a BorgWarner's eLSD). Hyundai has been obsessed with vertical integration from the beginning (they even have their own steel company) and one of their subsidiaries called Hyundai Wia have started to mass produce the eLSD last year.

 

[sprintcup]

I'm fairly certain that neither PDEN or JSN use the BorgWarner FXD (which is a BorgWarner's eLSD). Hyundai has been obsessed with vertical integration from the beginning (they even have their own steel company) and one of their subsidiaries called Hyundai Wia have started to mass produce the eLSD last year.

Again great info, strike my comment #66, just did a Google search and it came up with BW being used, I'm just wondering if there will be a service life and cost even under warranty.

 

[epialthes]

I heard it's a fill-for-life type but I haven't checked it myself whether it has a drain plug or not. If it fails under warranty, they'll change the whole LSD assembly for free. The unit price is about $1k in Korea.

 

[TarmoT]

It looks different than BW unit on MK7 VW but it can be because of different design but still not sure that eLSD Hyundai is using, comes from BW:

Some information about cost of that unit:
https://www.oempartsquick.com/oem-parts/hyundai-e-lsd-assy-4740024000

 

[TarmoT]

It is how our beast looks like in real life:

 

[Cygnus X-1]

Drill a couple of holes in that sucker and make your own fill & drain ports. Then drain fully, flush and add better true full synthetic fluid. Anyone down?


(Probably would be a good idea to get the default fluid analyzed to see what it is.)

 

[PLT_Triks]

I also noticed this on my VN PP when I first picked it up; it was a cold day.

And for what it's worth I don't think this is a i30N/VN issue; I've noticed the exact same behaviour and noise on my 2017 Audi S3 which also rides on low profile 19's. For the Audi I noticed this behavior is gone when I have my 18" winters on.

 

[PeterP]

Hmmm, to fully test this you must meet atleast 3 conditions.
1. Dry road
2. Warmed up tyres
3. Going into the corner slower and accelerating out of it 80-100% throttle.

The result should be no noise, because this is an electronicaly controlled diff, but it's still mechanical, just electronics control it. Anyway you should feel how the outer wheel grips and pulls you where you're steering. Good example is going from outside the corner on the inside of it and applying even more steering input, so that in the end you have to ease off the steering input because it would pull you in too much. Idk how to explain it otherwise. Hope this helps.

 

[IamRy]

I'm fairly sure the P-Zeros suffer with this skipping/hopping problem more than other brands as changing tyre has been reported to reduce the violent axle hop when wheel spinning in other threads too. Mine does it too on cold morning and while it doesn't sound good it has never caused me concern.

To park my dad's old C6 RS6 you had to do a series of 90° turns in reverse and the amount of tension you would build up doing that with a torsen centre diff would be enough to change the ride height between both sides of the car once you reached a stop.

 

[Rotorhead500]

I also noticed this on my VN PP when I first picked it up; it was a cold day.

And for what it's worth I don't think this is a i30N/VN issue; I've noticed the exact same behaviour and noise on my 2017 Audi S3 which also rides on low profile 19's. For the Audi I noticed this behavior is gone when I have my 18" winters on.

Yes, same here.

 

[Floyd8794]

My car recently started displaying "check limited differential" message. Dealer replaced diff under warranty - no sign of skipping/rubbing since then. According to service adviser, part is improved version

 

[asd]

My car recently started displaying "check limited differential" message. Dealer replaced diff under warranty - no sign of skipping/rubbing since then. According to service adviser, part is improved version

Mhhh now I want the improved one too :/