Here in Brazil, 2G grand vitara was sold as Tracker until 2009. In 2001 and 2002 the engine was RF, 2003 and 2004 RHZ and 2007-2009 J20A. The J20A verson has a aluminium front differential housing and it's common to swap it for the diesel version. I bought a diesel version diff and the mouting is strange, I've attached an image of both housings. My theory is that the diesel one that I bought is an adaptation of another suzuki vehicle.