1994 Subaru Svx

I have a 1994 Subaru SVX. This is a great car, but the transmission is making a klunking sound. This is the AWD version and I have read other reviews that say the transmission in the AWD version especially overheats and goes bad. My tranny shifts fine in all the gears, but the klunking has gotten so loud it sounds as if it is about to blow up. I have been looking for an Automatic Transmission Service manual, but cannot find one. Any ideas???

try the subaru forums... this is the Infiniti J30.... i'd say ebay for the manual...