Took a look under the wife's 2007 FX4 and found the transfer case is leaking. Fluid has been sprayed all over so I cleaned it up and added fluid. Gonna replace the seal where the driveshaft is but I can't be sure that the leak is coming from there or only from there. Question is, if I have to crack open the transfer case, does anyone know what gasket(s) it takes? Can't find any gaskets on the Ford parts site, just the seals. It's a BW 4406. Thanks!