One problem related to automatic transmission cooler has been reported for the 1998 Saturn SC. The most recently reported issues are listed below.
Air conditioning unit stopped cooling. Dealer wanted to trouble shoot@$80. 00/hour. Haynes service manual said to check fuse . Replaced diode @$4. 00 and fixed myself. Manual transmission whining in 2nd and 3rd gear. Checked transmission dipstick and transmission fluid was low. Added fluid and anything over 1 quart poured out. Had transmission shop check it out for blown seal and they found internal metal fracture in transaxle inner case caused by shear pin movement. Saturn issued service manual notification in Jan. 1998. Dealer and Saturn are no help. Vehicle only warranteed 3 years or 36k even though this has been a known problem since 1997. Saturn blames owners for their bad engineering and does not stand behind their crappy vehicles.