Yes the gearboxes are actually made in germany and can be found in some of the bmw 5 series and they have the same leaking and warping problems I have had mine done on my STR twice.The first time it was warped and was leaking even when the car was stationary. Took it to an over priced indie and advised the to change the electronic sleeve at the same time which they didn't 12 months down the line the sleeve started to leak so had to have it done all over again.I was told that the range rovers have the alloy one because changing the gearbox sump on those mean dropping the subframe.
If you do have it done get a kit with the sleeve with it they only cost about £11 and are known to leak above 60k miles