2003 Lexus LS 430FACTORY OEM SERVICE PROCEDURE

Service Data

WARNING: This page is about a different car, the 2005 Toyota 4Runner. However, it is still accessible from the selected car via links, so may be relevant.
Service Data - Differential (1 Of 4)

Differential carrier assy front (1GR-FE (4WD)) Differential drive pinion preload (at starting)    
  New bearing 0.98 -- 1.57 N.m (10 -- 16 kgf.cm, 8.7 -- 13.9 in..lbf)
  Reused bearing 0.49 -- 0.78 N.m (5 -- 8 kgf.cm, 4.3 -- 6.9 in..lbf)
Total preload (at starting)   Drive pinion preload plus
    0.20 -- 0.63 N.m (2.0 -- 6.4 kgf.cm, 1.8 -- 5.6 in..lbf)
Differential ring gear backlash 0.11 -- 0.18 mm (0.0043 -- 0.0071 in.)
Differential side gear backlash 0 -- 0.15 mm (0 -- 0.00591 in.)
Front differential carrier oil seal    
  Oil seal drive in depth 4.35 ± 0.45 mm (0.171 ± 0.018 in.)
Front differential side oil seal    
  Oil seal drive in depth 0 ± 0.45 mm (0 ± 0.0177 in.)
Front differential side tube oil seal    
  Oil seal drive in depth 5.3 ± 0.5 mm (0.2087 ± 0.0197 in.)
Front differential side gear needle roller bearing    
  Bearing press in depth 1.7 ± 0.3 mm (0.067 ± 0.012 in.)
Differential clutch sleeve and clutch sleeve hork clearance    
  Max. 0.35 mm (0.0138 in.)
Differential carrier assy front (2UZ-FE (4WD)) Companion flange vertical runout Max. 0.10 mm (0.0039 in.)
Differential drive pinion preload (at starting)    
  New bearing 0.98 -- 1.57 N.m (10 -- 16 kgf.cm, 8.7 -- 14 in..lbf)
  Reused bearing 0.49 -- 0.78 N.m (5 -- 8 kgf.cm, 4.3 -- 6.9 in..lbf)
Total preload (at starting)   Drive pinion preload plus
    0.25 -- 0.45 N.m (2.5 -- 4.6 kgf.cm, 2.2 -- 4.0 in..lbf)
Differential ring gear backlash 0.13 -- 0.18 mm (0.0051 -- 0.0071 in.)
Differential case runout Max 0.04 mm (0.0018 in.)
Side gear backlash 0 -- 0.15 mm (0 -- 0.00591 in.)
Front differential carrier oil seal    
  Oil seal drive in depth 4.35 ± 0.45 mm (0.171 ± 0.018 in.)
Front differential side oil seal    
  Oil seal drive in depth 0 ± 0.3 mm (0 ± 0.012 in.)
Front differential side tube oil seal    
  Oil seal drive in depth 5.3 ± 0.5 mm (0.209 ± 0.020 in.)
Differential side gear backlash 0.05 -- 0.20 mm (0.002 -- 0.008 in.)
Differential ring gear backlash 0.13 -- 0.18 mm (0.0051 -- 0.0071 in.)
Service Data - Differential (2 Of 4)

Differential carrier assy front (4WD) Companion flange lateral runout Max. 0.10 mm (0.0039 in.)
Front differential side gear thrust washer thickness 1.48 -- 1.52 mm (0.0583 -- 0.0598 in.)
1.53 -- 1.57 mm (0.0602 -- 0.0618 in.)
1.58 -- 1.62 mm (0.0622 -- 0.0638 in.)
1.63 -- 1.67 mm (0.0642 -- 0.0657 in.)
1.68 -- 1.72 mm (0.0661 -- 0.0677 in.)
1.73 -- 1.77 mm (0.0681 -- 0.0697 in.)
1.78 -- 1.82 mm (0.0701 -- 0.0717 in.)
1.83 -- 1.87 mm (0.0720 -- 0.0736 in.)
1.88 -- 1.92 mm (0.0740 -- 0.0756 in.)
Front differential ring gear thrust washer thickness 1.59 -- 1.61 mm (0.0626 -- 0.0634 in.)
1.62 -- 1.64 mm (0.0638 -- 0.0646 in.)
1.65 -- 1.67 mm (0.0650 -- 0.0657 in.)
1.68 -- 1.70 mm (0.0661 -- 0.0669 in.)
1.71 -- 1.73 mm (0.0673 -- 0.0681 in.)
1.74 -- 1.76 mm (0.0685 -- 0.0693 in.)
1.77 -- 1.79 mm (0.0697 -- 0.0705 in.)
1.80 -- 1.82 mm (0.0709 -- 0.0717 in.)
1.83 -- 1.85 mm (0.0720 -- 0.0728 in.)
1.86 -- 1.88 mm (0.0732 -- 0.0740 in.)
1.89 -- 1.91 mm (0.0744 -- 0.0752 in.)
1.92 -- 1.94 mm (0.0756 -- 0.0764 in.)
1.95 -- 1.97 mm (0.0768 -- 0.0776 in.)
1.98 -- 2.00 mm (0.0780 -- 0.0787 in.)
2.01 -- 2.03 mm (0.0791 -- 0.0800 in.)
2.04 -- 2.06 mm (0.0803 -- 0.0811 in.)
2.07 -- 2.09 mm (0.0815 -- 0.0823 in.)
2.10 -- 2.12 mm (0.0827 -- 0.0835 in.)
2.13 -- 2.15 mm (0.0839 -- 0.0846 in.)
2.16 -- 2.18 mm (0.0850 -- 0.0858 in.)
2.19 -- 2.21 mm (0.0862 -- 0.0870 in.)
2.22 -- 2.24 mm (0.0874 -- 0.0882 in.)
2.25 -- 2.27 mm (0.0886 -- 0.0894 in.)
2.28 -- 2.30 mm (0.0898 -- 0.0906 in.)
2.31 -- 2.33 mm (0.0909 -- 0.0917 in.)
2.34 -- 2.36 mm (0.0921 -- 0.0929 in.)
2.37 -- 2.39 mm (0.0933 -- 0.0941 in.)
2.40 -- 2.42 mm (0.0945 -- 0.0953 in.)
2.43 -- 2.45 mm (0.0957 -- 0.0965 in.)
2.46 -- 2.48 mm (0.0969 -- 0.0976 in.)
Differential carrier assy front (4WD) Rear differential drive pinion plate washer thickness 1.69 -- 1.71 mm (0.0665 -- 0.0673 in.)
1.72 -- 1.74 mm (0.0677 -- 0.0685 in.)
1.75 -- 1.77 mm (0.0689 -- 0.0697 in.)
1.78 -- 1.80 mm (0.0701 -- 0.0709 in.)
1.81 -- 1.83 mm (0.0713 -- 0.0720 in.)
1.84 -- 1.86 mm (0.0724 -- 0.0732 in.)
1.87 -- 1.89 mm (0.0736 -- 0.0744 in.)
1.90 -- 1.92 mm (0.0748 -- 0.0756 in.)
1.93 -- 1.95 mm (0.0760 -- 0.0768 in.)
1.96 -- 1.98 mm (0.0772 -- 0.0780 in.)
1.99 -- 2.01 mm (0.0783 -- 0.0791 in.)
2.02 -- 2.04 mm (0.0795 -- 0.0803 in.)
2.05 -- 2.07 mm (0.0807 -- 0.0815 in.)
2.08 -- 2.10 mm (0.0819 -- 0.0827 in.)
2.11 -- 2.13 mm (0.0831 -- 0.0839 in.)
2.14 -- 2.16 mm (0.0843 -- 0.0850 in.)
2.17 -- 2.19 mm (0.0854 -- 0.0862 in.)
2.20 -- 2.22 mm (0.0866 -- 0.0874 in.)
2.23 -- 2.25 mm (0.0878 -- 0.0886 in.)
2.26 -- 2.28 mm (0.0890 -- 0.0898 in.)
2.29 -- 2,31 mm (0.0902 -- 0.0909 in.)
2.32 -- 2.34 mm (0.0913 -- 0.0921 in.)
Service Data - Differential (3 Of 4)

Differential carrier assy rear Companion flange vertical runout Max 0.10 mm (0.0039 in.)
Companion flange lateral runout Max 0.10 mm (0.0039 in.)
Differential ring gear runout Max 0.07 mm (0.0028 in.)
Rear differential case runout Max 0.07 mm (0.0028 in.)
Differential drive pinion preload (at starting)    
  New bearing 1.05 -- 1.64 N.m (10.7 -- 16.7 kgf.cm, 9.3 -- 14.5 in..lbf)
  Reused bearing 0.56 -- 0.85 N.m (5.7 -- 8.7 kgf.cm, 5.0 -- 7.5 in..lbf)
Total preload (at starting)   Drive pinion preload plus
    0.39 -- 0.59 N.m (4.0 -- 6.0 kgf.cm, 3.5 -- 5.2 in..lbf)
Differential ring gear backlash 0.13 -- 0.18 mm (0.0051 -- 0.0071 in.)
Rear differential case side gear backlash LH 0.05 -- 0.20 mm (0.0002 -- 0.008 in.)
Rear differential case side gear backlash RH 0.05 -- 0.20 mm (0.0002 -- 0.008 in.)
Rear differential carrier oil seal    
  Oil seal drive in depth 0.7 ± 1.3 mm (0.0276 ± 0.0512 in.)
Rear differential side gear thrust washer thickness 0.9 mm (0.0354 in.)
1.0 mm (0.0394 in.)
1.1 mm (0.0433 in.)
1.2 mm (0.0472 in.)
1.3 mm (0.0512 in.)
Service Data - Differential (4 Of 4)

Differential carrier assy rear Rear differential drive pinion plate washer thickness 1.70 mm (0.0669 in.)
1.73 mm (0.0681 in.)
1.76 mm (0.0693 in.)
1.79 mm (0.0705 in.)
1.82 mm (0.0717 in.)
1.85 mm (0.0728 in.)
1.88 mm (0.0740 in.)
1.91 mm (0.0752 in.)
1.94 mm (0.0764 in.)
1.97 mm (0.0776 in.)
2.00 mm (0.0787 in.)
2.03 mm (0.0799 in.)
2.06 mm (0.0811 in.)
2.09 mm (0.0823 in.)
2.12 mm (0.0835 in.)
2.15 mm (0.0846 in.)
2.18 mm (0.0858 in.)
2.21 mm (0.0870 in.)
2.24 mm (0.0882 in.)
2.27 mm (0.0894 in.)
2.30 mm (0.0906 in.)
2.33 mm (0.0917 in.)
Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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