Pinion Assembly (B2200, B2600i, Miata, Protege 4WD & 929)
- Using a press, install pinion bearing races in differential housing. Place original spacer, rear bearing and Bearing Collar (49 H027 001 ) onto Drive Pinion (49 8531 565 ). Secure collar with "O" ring. Install assembly into differential housing.
- Install front bearing, Collar (49 8531 567 on 929 or 49 U027 001 on B2200 and B2600i), companion flange, washer and original drive pinion nut. See Fig 1. Tighten flange nut so assembly can be turned by hand.
- 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 on top of Drive Pinion (49 F027 001
). See GAUGE BLOCK SELECTION .GAUGE BLOCK SELECTION
Application Use Gauge Block No. Front Differential B2600i & MPV 4WD 49 0305 555 Rear Differential B2200 49 0305 555 B2600i, Protege 4WD & 929 49 0660 555 Miata 49 N027 001 - Set pinion height gauge on top of gauge block. Set dial indicator to measure distance to a point where side bearing sits. Measure lowest point. See Fig 1. Measure both sides. Add both measurements together and divide sum by 2.
- 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 dummy pinion shaft. Press rear pinion bearing on pinion shaft.
- Install pinion shaft, spacer, front bearing, collapsible spacer and companion flange in differential housing. DO NOT install pinion seal at this time. DO NOT exceed one ton force or collapsible spacer will be damaged.
- Temporarily tighten drive pinion nut. Turn companion flange by hand to seat bearing. Tighten drive pinion nut to 94-130 ft. lbs. (128-177 N.m). Check pinion bearing preload, at drive pinion nut. See PINION PRELOAD SPECIFICATIONS . If pinion bearing preload is not as specified, replace collapsible spacer and recheck preload.
- 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 94-130 ft. lbs. (128-177 N.m). Recheck pinion bearing preload.
PINION PRELOAD SPECIFICATIONS
| Application | INCH lbs. (N.m) | |
|---|---|---|
| B2200 & 929 | 11.3-15.6 (1.3-1.8) | |
| B2600i 4WD | ||
| Front | 11.3-15.6 (1.3-1.8) | |
| Rear | 7.8-12.2 (0.9-1.4) | |
| Miata & Protege 4WD (Rear) | 2.6-6.1 (0.3-0.7) | |
| MPV 4WD | ||
| Front | 7.8-12.2 (0.9-1.4) | |
| Rear | 11.3-15.6 (1.3-1.8) | |
| RX7 | ||
| Non-Turbo | 7.8-12.1 (0.9-1.4) | |
| Turbo | 11.3-15.6 (1.3-1.8) | |