Bearing Preload (G25M-R)
- Remove differential seals from transaxle case and clutch housing. Remove input shaft seal from clutch housing. Install differential bearing outer race in clutch housing.
- Remove primary and secondary shaft outer race from clutch housing. Install primary and secondary shaft bearing outer race into transaxle case. Remove differential bearing outer race from transaxle case. Note selector arrangement. See Fig 1.
- Install differential assembly into clutch housing. Install outer bearing race on differential bearing. Install appropriate selector from Shim Selector Tool Set (49 G030 380D) on outer bearing race. Install selector in primary and secondary outer bearing race bore. Place outer bearing races in selector and set shaft into appropriate selector. Install transaxle case, spacers and bolts. Tighten bolts to 27-38 ft. lbs.(37-52 N.m).
- Seat bearings by turning selector to widen measuring gap. See Fig 2. Turn selector with adjuster bars until selector cannot be turned by hand. Reverse direction to eliminate measuring gap. Expand selector by hand until selector no longer turns. Ensure shafts turn smoothly.
- Measure gap with feeler gauge. See Fig 3. Measure around entire circumference of selector. Select thinnest allowable shim to obtain standard clearance (primary shaft) or bearing preload (secondary shaft).
- Primary shaft bearing clearance is 0-.002" (0-.05 mm). Shims range in thickness from .008" (.20 mm) to .028" (.70 mm) in increments of .002" (.05 mm).
- Secondary shaft bearing preload is selector clearance plus .001" (.03 mm) - .003" (.08 mm). Shims range in thickness from .008" (.20 mm) to .028" (.70 mm) in increments of .002" (.5 mm).
- Turn differential selector collars in opposite direction until gap is closed. Mount preload adapter into differential until in contacts pinion shaft. Using INCH-lb. torque wrench, rotate differential. See Figure. Turn selector collars until turning torque is 4.3 INCH lbs. (.50 N.m).
- Using feeler gauge, measure clearance of gap between selector collars. See Figure. Measure around entire circumference of selector. Select shims equal to maximum clearance measured plus .006" (.15 mm). Shims range in thickness from .004" (.10 mm) to .047" (1.20 mm) in increments of .002" (.05 mm).
- Disassemble transmission case. Remove selectors. Remove bearing races and install selected shims. See Figure. Install primary shaft and differential. Install transaxle case to clutch housing. Tighten bolts in crisscross pattern to 28-38 ft. lbs (38-51 N.m).
- Using INCH-lb. torque wrench and appropriate adapter, measure turning torque (preload) of differential and primary shaft. See Figure and Fig 4
. Differential preload should be 13-17 INCH lbs. (1.4-1.0 N.m). Primary shaft preload should be .9-2.1 INCH lbs. (.1-.2 N.m). If preload is not as specified, repeat adjustment procedure.
- Disassemble transmission case. Remove primary shaft and differential. Install secondary shaft. Install transaxle case to clutch housing. Tighten bolts in crisscross pattern to 28-38 ft. lbs (38-51 N.m).
- Using INCH-lb. torque wrench and appropriate adapter, measure turning torque (preload) of secondary shaft. See Fig 4. Secondary shaft preload should be 1.8-3.4 INCH lbs. (.2-.3 N.m). If preload is not as specified, repeat adjustment procedure.
Courtesy of MAZDA MOTORS CORP.
Courtesy of MAZDA MOTORS CORP.
Courtesy of MAZDA MOTORS CORP.
Courtesy of MAZDA MOTORS CORP.