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Pinion Assembly (RX7)

  1. Using a press, install rear pinion bearing outer race in differential housing. Install center bearing outer race. Using original rear bearing spacer, install rear bearing on Setting Pinion (49 F027 001 ).
  2. Position drive pinion in carrier and install center bearing, long collar and companion flange. Tighten pinion nut just enough so pinion can be turned by hand.
  3. Place a dial indicator on Pinion Height Gauge (49 0727 570 ). Place pinion height gauge on a flat surface and zero dial indicator. Position Gauge Block (49 0305 555 ) on top of Setting Pinion (49 F027 001 ).
  4. Set pinion height gauge on top of gauge block. Set dial indicator to measure distance to lowest point where side bearing sits. See Figure. Measure both sides. Add both measurements together and divide sum by 2.
  5. If measurement is not zero, replace pinion spacer. Spacers are available in a range of .1213-.1366" (3.081-3.470 mm) in .001" (.03 mm) increments. Remove setting pinion, select spacer and press rear pinion bearing on drive pinion shaft.
  6. Install drive pinion, spacer, front bearing, collapsible spacer and companion flange in differential housing. DO NOT  install pinion seal yet. Press center bearing onto drive pinion using Adapter (49 1243 465A ). DO NOT  exceed one-ton force or collapsible spacer will be damaged. Two different collapsible spacers are available, ensure correct one is used.
    RX7 DRIVE PINION COLLAPSIBLE SPACERS

    Application Length In. (mm)
    Non-Turbo 1.923-1.935 (48.85-49.15)
    Turbo 2.238-2.250 (56.85-57.15)
  7. Lubricate ends of long collar with grease and install. Using a press, install front bearing using Adapter (49 F027 009 ). Press fit with a 2-3 ton force. DO NOT  install oil seal yet. Install companion flange and nut. Tighten drive pinion nut to 94 ft. lbs. (128 N.m). Turn companion flange by hand to seat bearing.
  8. Pinion bearing preload at drive pinion nut should be 11.3-15.6 INCH lbs. (1.3-1.8 N.m). Adjust preload by tightening drive pinion nut. If correct preload cannot be obtained within drive pinion nut tightening range of 94-210 ft. lbs. (128-284 N.m), replace collapsible spacer and recheck preload.
  9. Remove drive pinion nut and companion flange. Install pinion seal. Apply oil to seal lip. Install companion flange. Using a new drive pinion nut, tighten nut to specification established for correct preload.
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