I am in the process of replacing my center differential in my 2002 WRX. It's all ready to go back together, need to pick up the part at the dealer tomorrow. My question is, there was no gasket at all between the transmission and the rear cover. Should I just use something like Hondabond to seal it? Seems like adding a gasket would leave more play in the roller bearings and I know that would be detrimental. When I took it apart there was a very small quantity of black sealant around the two mating surfaces. Thanks for your help! Oops! may want to move this to the transmission section, sorry.