One problem related to clutch bell housing has been reported for the 2000 Saturn SL. The most recently reported issues are listed below.
Roll pin on retainer in transmission differential sheered off causing the retaining pin to wear through the bell housing and seize transmission. A roll pin is like using a rivet to hold a very important mechanical component together. This is another horrible gm design. This is an accident waiting to happen. $2300 later to replace the transmission.