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No need to disconnect the prop shaft as unplugging the Haldex unit or removing the fuse has the same effect. If it's still dragging it's a mechanical issue. But in most of the cases above the rear diff seems to be ok.

Maybe worth a try as we have changed everything else. I recently tested the signals on the Haldex connector to check that the handbrake and foot break signals were getting through, which they were. In the Haldex manual it stated that the handbrake and foot break direct signals override...

It could be the ABS unit but the issue that makes me doubt this is that the handbrake on one click doesn't disengage the diff. The handbrake signal goes directly to the Haldex unit not via the ECU or ABS units. So it looks like the Haldex isn't getting the signal (although VagCom finds the...

I'm new to this thread but I have the same rear diff locking issue when maneuvering at low speeds. The only difference is that ours is an Audi TT race car with a race Haldex Controller. At first we thought it was the race controller that was causing the issue, but when we replaced it with...