2003 Lexus LS 430FACTORY OEM SERVICE PROCEDURE

Service Data

AUTOMATIC TRANSMISSION COMPONENTS SERVICE SPECIFICATION

Line Pressure (Wheel Locked) Idling
  1. D position
  2. R position
  1. 395 - 455 kPa (4.0 - 4.6 kgf.cm2 , 57 - 65 psi)
  2. 0 kPa (0 kgf.cm2 , 0 psi)
Stall
  1. D position
  2. R position
  1. 1,200 - 1,360 kPa (12.2 - 13.9 kgf.cm2 , 174 - 198 psi)
  2. 1,655 - 1,960 kPa (16.9 - 20.0 kgf.cm2 , 240 - 284 psi)
Accumulator back pressure
Engine idling and shift lever D position
ECM SLN terminal condition		 245 kPa (2.5 kgf.cm2 , 36 psi)
Engine stall revolution (D position) 2,450 +/- 150 rpm
Time lag N --> D position Less than 1.2 seconds
N --> R position Less than 1.5 seconds
Engine idle speed (N position and A/C OFF) 750 +/- 50 rpm
Drive plate runout Max 0.20 mm (0.0079 in.)
Torque converter clutch sleeve runout Max 0.30 mm (0.0118 in.)
Torque converter clutch installation (Correct distance)   More than 17.1 mm (0.673 in.)
Extension housing oil seal drive in depth from flat end   2.0 mm (0.079 in.)
Shift schedule
Differential gear ratio 3.266
D, 4 position (Throttle valve fully opened)
  1. 1 --> 2
  2. 2 --> 3
  3. 3 --> 4
  4. 4 --> 5
  5. 5 --> 4
  6. 4 --> 3
  7. 3 --> 2
  8. 2 --> 1
  1. 64 - 74km/h (40 - 46 mph)
  2. 96 - 107km/h (60 - 66 mph)
  3. 150 - 166 km/h (93 - 103 mph)
  4. 219 - 236 km/h (136 - 146 mph)
  5. 211 - 225 km/h (131 - 140 mph)
  6. 141 - 152 km/h (88 - 94 mph)
  7. 83 - 90 km/h (52 - 60 mph)
  8. 43 - 49 km/h (27 - 30 mph)
(Throttle valve fully closed)
  1. 4 --> 5
  2. 5 --> 4
  1. 35 - 40 km/h (22 - 25 mph)
  2. 26 - 31 km/h (16 - 19 mph)
3 position (Throttle valve fully opened)
  1. 1 --> 2
  2. 2 --> 3
  3. 4 --> 3
  4. 3 --> 2
  5. 2 --> 1
  1. 64 - 74 km/h (40 - 46 mph)
  2. 96 - 107 km/h (60 - 66 mph)
  3. 159 - 171 km/h (99 - 106 mph)
  4. 83 - 90 km/h (52 - 60 mph)
  5. 43 - 49 km/h (27 - 30 mph)
2 position (Throttle valve fully opened)
  1. 1 --> 2
  2. 3 --> 2
  3. 2 --> 1
  1. 64 - 74 km/h (40 - 46 mph)
  2. 104 - 111 km/h (65 - 69 mph)
  3. 43 - 49 km/h (27 - 30 mph)
L position (Throttle valve fully opened)
  1. 2 --> 1
  1. 40 - 46 km/h (25 - 29 mph)
Lock-up point
(Throttle valve opening 5%)
5th gear (D position) Lock-up ON 61 - 67 km/h (38 - 42 mph)
Lock-up OFF 57 - 63 km/h (35 - 39 mph)
4th gear (4 position) Lock-up ON 145 - 156 km/h (90 - 97 mph)
Lock-up OFF 137 - 149 km/h (85 - 92 mph)
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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