unusual banging sound only during reverse operation

[Notef]

I hear a boom (resembling metal striking metal) while reversing my 2013 2.2 SD4 Evoque. I have changed the rear differential and Haldex twice, however the issue persists. I am uncertain about other measures I may take to resolve the issue. Do you have any suggestions?

[LimeLing]

A spline connecting the gearbox and PTU may experience wear, resulting in a pounding noise under power, particularly at low speeds. It should also occur in forward gears; nevertheless, it may wear in such a manner that it slides in one direction but not the other.

[Notef]

Are you certain that this might be the problem? I left the vehicle with the Haldex pump unplugged (no power to the back wheels), and it remained silent, while the PTU was rotating freely. I will seek that spline, thank you! Do you possess any other hypotheses on the potential issue?

[LimeLing]

If the Haldex was not engaged, as it often is at low speeds in reverse, there would be no stress on the spline, thus eliminating any cause for slippage and noise.
What is the rationale for replacing the Haldex and rear differential a second time if the first attempt did not resolve the issue?
Consult with Bell Engineering, who has expertise on the Freelander/Evoque driveline.

[Notef]

I replaced them since I purchased them second-hand, believing they had the same issue as mine.
What is the method to contact Bell Engineering?
I now own two pairs of Haldex and a rear differential in my backyard, along with one new set put in the vehicle.

[LimeLing]

https://www.bellengineering.co.uk/

[LimeLing]

😉