I am planning on converting my jetta mk6 2.5 to 4motion. From what I have gathered I need a 4motion transmission with transfer case, passenger side front axle, drive shaft, center driveshaft bracket, fuel tank, and the entire IRS assembly with haldex, axles, etc. It seems that mk5 r32's, golf R's, a3 Quattro's, tt mk2's are all acceptable donor cars.
Some of the smaller details are less obvious, however. The haldex connects to the canbus system to receive abs information, but how exactly is it connected to the canbus system, is there already a connecter near there it can plug into? Will the 4motion fuel tank from the donor car fit directly into the jetta, filler neck and all? The transfer case has a bracket that supposedly mounts on to the rear of the engine for support, but will this bracket also mate to the 2.5 engine? I have heard that the 2.5 engine has a fuel return line and the 2.0 did not. Does this mean the fuel pump on the new tank is not compatible, and/or can my original fuel pump be installed in the new tank? The jetta is an inch or so longer than the golf R in wheelbase, so does the driveshaft adjust in length to accommodate this difference? Will the exhaust be able to fit in the space between the K frame and the spare wheel well? Am I correct in thinking that I will need a custom made downpipe to skirt around the driveshaft or is there already a 4motion car with an applicable downpipe that can be substituted in? It appears that the mount that the drive shaft's center bracket must be cut from the tunnel of the donor car and welded onto the tunnel of my car? Are tiguans also acceptable donor vehicles in terms of the shape of its fuel tank and IRS suspension assembly?
Thanks for the help!