Electronic Differential Lock

Hello TDI fans!

I would like to know how to retrofit an electronic differential lock (e-diff) to my car (Audi A4, manufactured in 1996, diesel).
Does anyone have a tip for me?

Sure, here's the translation:

'lg' is a German abbreviation that stands for 'liebe Grüße,' which means 'best regards' or 'warm greetings.' It's commonly used in emails, letters, and other forms of communication to express affection or goodwill.

Hello,

To achieve this, it is necessary, among other things:

- Suitable ABS control unit.
- Different valve block.
- Additional cables/lines.

All in all, it's quite an expensive undertaking.

Hello,

Michael II wrote:

...All in all, quite an expensive undertaking.

mainly because it rarely makes a difference, at least not on my A3 from 1998.

It's worth it.
- If you want to start driving in the winter, and one of the drive wheels is on a patch of ice, and you don't want to roll back even a meter.

It's completely useless if:
- in winter, the entire street is covered in ice, or you find yourself standing on a wet meadow.

Reason: the regulation unsensitively brakes the wheel that is currently spinning. Unfortunately, this only causes the left and right front wheels to alternately spin on a wet meadow.
With a sensitive touch on the clutch, you can achieve a lot more here. With a TDI, you don't really need to give it too much gas anyway.
However, it would definitely be a benefit for those who are not very coordinated and who regularly damage the lawn in the driveway at my mother's house every week.

Best regards, Rainer.

I also have EDS in my A6 C4, and I haven't had great experiences with it so far. The intervention is quite abrupt; the first time, I thought the car was going to fall apart. It only seems to activate when the road surface has different friction coefficients, or when driving in curves in the rain. When I accelerate fully on a straight road, the front wheels spin uncontrollably, both in first and second gear, despite the EDS being active.

best regards

Hannes.

Hi.

Hannes wrote:

When I accelerate fully on a straight road, the front wheels spin uncontrollably in both first and second gear, even with EDS engaged. best regards Hannes

Logically. Electronic Differential Lock! That has absolutely nothing to do with ESP or ASR.
The anti-slip regulation reduces engine power during acceleration to prevent the wheels from spinning.
EDS prevents one wheel from stopping while the other, for example, spins uselessly on an icy surface. As the name suggests, it achieves a similar effect to a differential lock, but vehicles with EDS have a differential without a mechanical locking function.

Best regards, Rainer.

Rainer K. wrote:

Hi Logically. Electronic Differential Lock! That has absolutely nothing to do with ESP or ASR. Greetings, Rainer

I already know that, I just didn't want to create any misunderstandings about whether EDS actually provides any benefit.

I'm not a big fan of ASR (Automatic Stability Control) either. Recently, I had to drive a BMW 320d with ASR up a mountain road. I had to turn off the ASR because the car was being pulled off course by the system in the curves. My conclusion, also based on my experience with my quattro: only all-wheel drive helps with traction problems, the rest is forgettable.

Best regards,

Hannes.

Hi everyone,

I wouldn't go that far. I think both are very useful, considering the effort involved (which isn't that great, because the ABS provides the systems and a lot of the ASR functionality is implemented in software).

EDS:

I always park here with one bicycle on the sidewalk, which isn't good for the tires, but there's no other way (it's required by the street regulations). In the winter, it was always a problem getting the Polo up there; the right front wheel would get stuck on the edge, and the left wheel would just spin. Driving up with momentum isn't safe if the gap is small... With the EDS (electronic parking system), it's not a problem; you just drive up, wait a moment, and you're there, and it's very smooth.

ASR:

I find it quite useful for starting on snow, as it allows you to get going without excessive sideways slipping.

Of course, you can't compare both systems to all-wheel-drive cars with mechanical locking differentials, but that's not really the target audience anyway...

Best regards,

Jan.

Just a quick question:

I have a Skoda Octavia with a 66kW TDI automatic transmission, equipped with ABS/ASR Teves Mk60.

According to the list, it doesn't have EDS (Electronic Differential Lock). However, if I accelerate hard at a junction/intersection, the inside wheel spins... and then the braking system makes a squeaking and grinding noise and brakes the inside wheel. If I accelerate a little more gently, I get the squealing start with the ASR (Anti-Slip Regulation) light flashing, but without any brake intervention.

hm... so, it's definitely EDS then? I haven't been able to properly check it yet because I don't have ice plates, and the lawn always makes such a mess on the car .

@michal-II:
Can I determine what's going on based on STG numbers, softcoding, or other methods?

CU Gremlin.

Hello,

The Teves Mark 60 actually comes standard with EDS (Electronic Braking System).

Then my initial impression wasn't wrong...

Wow, I'm discovering more and more things about this car that it actually doesn't have .

CU Gremlin.