TM   10-3930-638-24&P 4-5. AXLE MAINTENANCE (cont) a. Differential Carrier (cont). ADJUSTMENTS   (cont) 26 (cont) ALL CONTACT BEARINGS SHOWN BELOW ARE ON RIGHT HAND SPIRAL RING  GEAR  –  THE  DRIVE  IS  ON  THE  CONVEX  SIDE  OF  THE  TOOTH. CONDITION   1 TYPICAL PREFERRED BEARING ON BOTH SIDES OF TOOTH WHILE  UNDER  A  LIGHT  LOAD CONDITION 2 TOE BEARING ON BOTH SIDES OF TOOTH-GEAR SET NOISY. TO MOVE  BEARING  TOWARD  HEEL  INCREASE  BACKLASH  WITHIN  LIMITS BY  MOVING  GEAR  AWAY  FROM  PINION. CONDITION 3 HEEL  BEARING  ON  BOTH  SIDES  OF  TOOTH-GEAR  SET  NOISY  AND COULD  RESULT  IN  EARLY  GEAR  FAILURE.  TO  MOVE  BEARING  TO- WARD  TOE  DECREASE  BACKLASH  WITHIN  LIMITS  BY  MOVING  GEAR TOWARD  PINION. CONDITION 4 LOW BEARING ON GEAR AND HIGH BEARING ON PINION. CORRECT BY PULLING PINION AWAY FROM GEAR. INCREASE MOUNTING DIS- TANCE  BY  ADDING  SHIMS  BETWEEN  BEARING  CAGE  AND  DIFFERENTIAL HOUSING. CONDITION 5 HIGH BEARING ON GEAR AND LOW BEARING ON PINION, CORRECT BY MOVING PINION IN TOWARD GEAR. DECREASE MOUNTING DIS- TANCE BY REMOVING SHIMS FROM BETWEEN BEARING CAGE AND DIFFERENTIAL  HOUSING. BACKLASH BACKLASH SHOULD BE MEASURED WITH A DIAL INDICATOR RIGIDLY MOUNTED WITH THE STEM PERPENDICULAR TO THE TOOTH SURFACE  AT  THE  EXTREME  HEEL. 4-246