Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2003 Lexus GS 430FACTORY OEM SERVICE PROCEDURE
Service Data
A/T COMPONENTS SERVICE SPECIFICATIONS (3UZ-FE)
| 3UZ-FE | ||
|---|---|---|
| Line pressure (Wheel locked) | ||
| Idling | ||
| D position | 395 - 455 kPa (4.0 - 4.6 kgf.cm2 , 57 - 65 psi) | |
| R position | 0 | |
| Stall | ||
| D position | 1,200 - 1,360 kPa (12.2 - 13.8 kgf.cm2 , 174 - 196 psi) | |
| R position | 1,655 - 1,960 kPa (16.9 - 19.8 kgf.cm2 , 240 - 282 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 0.1 mm (0.004 in.) | |
| Extension housing oil seal drive in depth from flat end | 2.0 mm (0.079 in.) | |
| Shift schedule (NORM and PWR mode) Differential gear ratio 3.266 D, 4 position |
||
| (Throttle valve fully opened) | 1 --> 2 | 61 - 72 km/h (38 - 45 mph) |
| 2 --> 3 | 93 - 105km/h(58 - 65mph) | |
| 3 --> 4 | 144 - 162 km/h (89 - 100 mph) | |
| 4 --> 5 | 211 - 231 km/h (131 - 143 mph) | |
| 5 --> 4 | 204 - 220 km/h (126 - 136 mph) | |
| 4 --> 3 | 136 - 149 km/h (84 - 92 mph) | |
| 3 --> 2 | 80 - 88 km/h (50 - 55 mph) | |
| 2 --> 1 | 42 - 48 km/h (26 - 30 mph) | |
| (Throttle valve fully closed) | 4 --> 5 | 34 - 40 km/h (21 - 25 mph) |
| 5 --> 4 | 25 - 30 km/h (16 - 19 mph) | |
| 3 position | ||
| (Throttle valve fully opened) | 1 --> 2 | 61 - 72 km/h (38 - 45 mph) |
| 2 --> 3 | 93 - 105 km/h (58 - 65 mph) | |
| 4 --> 3 | 153 - 168 km/h (95 - 104 mph) | |
| 3 --> 2 | 80 - 88 km/h (50 - 55 mph) | |
| 2 --> 1 | 42 - 48 km/h (26 - 30 mph) | |
| 2 position | ||
| (Throttle valve fully opened) | 1 --> 2 | 61 - 72 km/h (38 - 45 mph) |
| 3 --> 2 | 100 - 108 km/h (62 - 67 mph) | |
| 2 --> 1 | 42 - 48 km/h (26 - 30 mph) | |
| L position | ||
| (Throttle valve fully opened) | 2 --> 1 | 39 - 45 km/h (24 - 28 mph) |
| Shift schedule (SNOW mode) Differential gear ratio 3.266 D, 4 position |
||
| (Throttle valve fully opened) | 1 --> 2 | 36 - 54 km/h (22 - 33 mph) |
| 2 --> 3 | 58 - 81 km/h (36 - 50 mph) | |
| 3 --> 4 | 87 - 115 km/h (54 - 71 mph) | |
| 4 --> 5 | 136 - 182 km/h (84 - 113 mph) | |
| 5 --> 4 | 84 - 114 km/h (52 - 71 mph) | |
| 4 --> 3 | 56 - 78 km/h (35 - 48 mph) | |
| 3 --> 2 | 5 - 44 km/h (3 - 27 mph) | |
| 2 --> 1 | 5 - 10 km/h (3 - 6 mph) | |
| (Throttle valve fully closed) | 4 --> 5 | 34 - 40 km/h (21 - 25 mph) |
| 5 --> 4 | 25 - 30 km/h (16 - 19 mph) | |
| 3 position | ||
| (Throttle valve fully opened) | 1 --> 2 | 36 - 54 km/h (22 - 33 mph) |
| 2 --> 3 | 58 - 81 km/h (36 - 50 mph) | |
| 4 --> 3 | 153 - 168 km/h (95 - 104 mph) | |
| 3 --> 2 | 5 - 44 km/h (3 - 27 mph) | |
| 2 position | ||
| (Throttle valve fully opened) | 1 --> 2 | 36 - 54 km/h (22 - 33 mph) |
| 3 --> 2 | 100 - 108 km/h (62 - 67 mph) | |
| L position | ||
| (Throttle valve fully opened) | 2 --> 1 | 39 - 45 km/h (24 - 28 mph) |
| Lock-up point (Differential gear ratio 3.266) (Throttle valve opening 5 %) |
||
| 5th gear (D position) | Lock-up ON | 59 - 66 km/h (37 - 41 mph) |
| Lock-up OFF | 55 - 62 km/h (34 - 38 mph) | |
| 4th gear (4 position) | Lock-up ON | 139 - 153 km/h (86 - 95 mph) |
| Lock-up OFF | 132 - 145 km/h (82 - 90 mph) | |
| Flex lock-up point (Differential gear ratio 3.266) (Throttle valve opening 3 %) D position (When accelerating) |
||
| 5th gear | Lock-up ON | 47 - 53 km/h (29 - 33 mph) |
| Lock-up OFF | 45 - 52 km/h (28 - 32 mph) | |
| 4th gear | Lock-up ON | 35 - 41 km/h (22 - 25 mph) |
| Lock-up OFF | 34 - 40 km/h (21 - 25 mph) | |
| 3rd gear | Lock-up ON | 25 - 30 km/h (16 - 19 mph) |
| Lock-up OFF | 23 - 28 km/h (14 - 17 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.