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Home >> GMC >> 1990 >> S15 Jimmy RWD, Automatic, 700R4/MD8 >> Repair and Diagnosis >> Drivelines & Axles >> Differentials & Drive Axles >> Drive Axle - 7.5", 7.625", 8.5" & 9.5" >> Removal & Installation >> Pinion Flange & Seal >> Installation

Pinion Flange & Seal: Installation

  1. Inspect pinion flange oil seal surface, drive splines, ears and bearing contact surface. Replace pinion flange (if necessary). Pack seal lip cavity with lithium base extreme pressure lubricant. Place pinion seal in bore.
  2. Using Seal Installer (J-23911 for 7 1/2" and 7 5/8" ring gear), Gauge Plate (J-22804-1 for 9 1/2" ring gear) and Seal Installer (J-22388 for 8 1/2" and 9 1/2" ring gear), drive pinion seal into place.
  3. Make sure seal is square in carrier. Pack cavity between end of pinion splines and pinion flange with a non-hardening sealer. Using Companion Flange Holder (J-8614-01), install flange on pinion shaft.
  4. Install washer and nut in original position, taking note of scribe marks and number of exposed threads. Measure pinion preload. Tighten nut in small increments until preload exceeds original figure by 3-5 INCH lbs. (.3-.6 N.m). Install drive shaft and lower vehicle.
NOTE: DO NOT  hammer flange onto pinion shaft, as ring gear and pinion will be damaged.