Hyundai Sonata 1991 Shop Manual page 376

DIFFERENTIAL
8. Apply specified sealant to the entire threads of the bolts and
tighten in the order shown in figure to specified torque with the
differential case clamped in a vise.
Specified sealant: 3M Stud Locking No. 4170
Caution
If a bolt is reused. remove the old sealant from the threads.
43-48
The numerals
CD
to
®
indicate
the tightening sequence.