To remove the driveshaft, follow the necessary service procedures. Loosen the drive pinion nut using special tool J34311 to hold the companion flange. Remove the companion flange, ensuring to match mark for correct installation, with a suitable puller. Take out the front oil seal from the differential carrier. For installation, apply multi-purpose grease to the sealing lips of the oil seal and press it into the carrier. Install the companion flange and drive pinion nut, torquing the drive pinion nut to the specified values. After that, install the driveshaft and check the fluid level. The drive pinion nut torque specifications are as follows: for model H190-ML (200SX solid rear axle type), total preload is 10-19 in. lbs. (94-217 ft. lbs.); for 1984-85 200SX model R200 (IRS type), it is 137-159 ft. lbs.; for 1986-88 200SX and 240SX model R200 (IRS type), it is 137-217 ft. lbs.; for 1985-88 200SX model R180 (IRS type), it is 123-145 ft. lbs.; and for 1986-88 Stanza Wagon model R180, it is also 123-145 ft. lbs.