Ford 2003 Mustang Workshop Manual page 1830

32. Install the torque converter nuts.
33. Install the flywheel inspection cover.
34. Install the driveshaft onto the transmission output shaft, aligning the index-mark in the six
o'clock position.
35. CAUTION: Use new bolts to install the driveshaft. If new bolts are not available,
apply threadlock to the threads of the original bolts.
CAUTION: The driveshaft centering socket yoke fits tightly on the rear axle pinion
flange pilot. To make sure the yoke seats squarely on the flange, tighten the bolts evenly
in the sequence shown.
NOTE: Align the marks made on the flange and driveshaft during removal.
Position the driveshaft and install the driveshaft-to-pinion flange bolts in the sequence shown.