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Home >> Toyota >> 1981 >> Land Cruiser 2D Utility >> Repair and Diagnosis (Single Page) >> Drivelines & Axles >> Differentials & Drive Axles >> Drive Axles - TOYOTA Separate Carrier >> Overhaul >> Differential >> Backlash & Side Bearing Play

Backlash & Side Bearing Play

  1. Assemble bearings in cups and install onto carrier. Install differential assembly into carrier, then fit adjusting nuts. Put bearing caps on in original position. Tighten bolts carefully, while checking that adjusting nuts are aligned in bearing bore threads. Install dial gauge so plunger touches flange side of ring gear. Tighten flange side adjusting nut until a slight backlash remains. During operation, rotate ring gear through several revolutions to seat side bearings. Tighten tooth side nut just to the point where there is no differential end play when measured with dial indicator. At this point tighten tooth side nut an additional 1-1 1/2 notches to preload side bearings.
    Combined (Side & Pinion) Bearing Preload

    Application New Bearing INCH Lbs. (N.m)
    Corolla
      6.00" Ring Gear 7.4-1 4.3 (.84-1.62)
      6.38" Ring Gear 10.4-17.4 (1.17-1.97)
      6.70" Ring Gear 11.3-18.2 (1.28-2.06)
    Celica & Supra 11.3-18.2 (1.28-2.06)
    Corona
      6.70" Ring Gear 11.3-18.2 (1.28-2.06)
      7.10" Ring Gear 17.4-18.2 (1.97-2.06)
    Cressida 17.4-24.2 (1.97-2.73)
    Pickup 20.0-27.8 (2.26-3.14)
    Land Cruiser 20.0-27.8 (2.26-3.14)
  2. Confirm that some backlash is still present. Install the preload flange onto the pinion shaft flange and measure preload. If within specifications go on to next step; if not, tighten tooth side adjusting nut one more notch and recheck.
  3. Install dial gauge so that plunger is perpendicular to ring gear tooth. Measure ring gear backlash. If not within specifications, turn left and right adjusting nuts to shift differential assembly in proper direction. If left side is loosened one notch, the right side must be tightened one notch to maintain side bearing preload. Continue procedure until backlash is within specifications. One notch will change backlash 0.002" (0.05 mm). Tighten side bearing cap bolts. Check gear tooth contact pattern. See Gear Tooth Contact Pattern at beginning of this section  . Install differential carrier.
AXLE ASSEMBLY SPECIFICATIONS

Application New Bearing INCH Lbs. (N.m)
Drive Pinion Bearing Preload
  Celica & Supra 8.7-13.9 (.98-1.57)
  Corolla
    6.00" Ring Gear 5.7-10.8 (.64-1.22)
    6.38" Ring Gear 8.7-13.9 (.98-1.57)
    6.70" Ring Gear 8.7 13.9 (.98-1.57)
  Corona
    6.70" Ring Gear 8.7-13.9 (.98-1.57)
    7.10" Ring Gear 14.0-19.0 (1.58-2.15)
  Cressida 13.8-19.0 (1.56-2.15)
  Pickup 16.5-22.6 (1.86-2.55)
  Land Cruiser 16.5-22.6 (1.86-2.55)
  Specification In. (mm) 
Side-to-Pinion Gear Backlash
  Corolla
    6.00" Ring Gear .0008-.006 (.02-.15)
    6.38" Ring Gear .0008-.008 (.02-.20)
    6.70" Ring Gear .002-.008 (.05-.20)
  Land Cruiser .0008-.008 (.05-.20)
  All Others .002-.008 (.05-.20)
Drive Pinion-to-Ring Gear Backlash
  Corolla
    6.00" Ring Gear .004-.006 (.10-.15)
    6.38" & 6.70" Ring Gear .005-.007 (.13-.18)
  Land Cruiser .006-.008 (.15-.20)
  All Others .005-.007 (.13-.18)
Ring Gear Backface Runout
  Pickup & Land Cruiser (1).004 (.10)
  All Others (1).003 (.07)
(1) Maximum Clearance.
Fig 1: Measuring Ring Gear Backlash
G09330056Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
TIGHTENING SPECIFICATIONS

Application Ft. Lbs. (N.m)
Drive Pinion Flange Nut
  Corolla
    6.00" Ring Gear 69-145 (94-197)
    6.38" & 6.70" Ring Gear 80-174 (109-236)
  Celica, Corona, Cressida and Supra Pickup 80-174 (109-236)
    7.50" Ring Gear 80-174 (109-236)
    8.00" Ring Gear 123-152 (167-207)
  Land Cruiser 145-174 (197-236)
Differential Bearing Cap Bolts
  Corolla
    6.00" Ring Gear 40-47 (54-64)
    6.38" Ring Gear 36-51 (49-69)
    6.70" Ring Gear 51-65 (69-88)
  Celica, Corona, Cressida, Supra and Pickup 51-65 (69-88)
  Land Cruiser 65-80 (88-109)
Ring Gear-to-Case Bolts
  Corolla
    6.00" Ring Gear 65-76 (88-103)
    6.38" Ring Gear 51-58 (69-79)
    6.70" Ring Gear 65-76 (88-103)
  Celica, Corona, Cressida, Supra and Pickup 65-76 (88-103)
  Land Cruiser 76-87 (103-118)
Carrier-to-Axle Housing
  Corona 18-25 (24-34)
  Pickup 14-22 (19-30)
Backing Plate & Axle Retainer Flange Bolts
  Celica and Supra 18-25 (24-34)
  Corolla, Corona and Cressida 43-54 (58-73)
  Pickup 43-58 (58-79)
  Land Cruiser 29-40 (39-54)
Front Hub-to-Flange (1) 20-25 (27-34)
Adjusting Nut (1) 58-72 (69-98)
Wheel Nuts (1) 65-87 (88-118)
(1) Pickup 4-WD & Land Cruiser.
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