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Chapter 3: Off-Vehicle Repair

WARNING: This page is about a different car, the 2003 Lexus LS 430. However, it is still accessible from the selected car via links, so may be relevant.
PROBLEM SYMPTOMS

Symptom Suspect Area See Section
Vehicle does not move in any forward position and reverse positions
  1. O/D one-way clutch (F0 )
  2. O/D direct clutch (C0 )
  3. O/D planetary gear unit
  4. Torque converter clutch
  1. (1)
  2. (1)
  3. (1)
  4. TORQUE CONVERTER CLUTCH AND DRIVE PLATE
Vehicle does not move in R position
  1. Center and rear planetary gear unit
  2. Direct clutch (C2 )
  3. 1st & reverse brake (B4 )
  4. O/D brake (B0 )
  1. (1)
  2. (1)
  3. (1)
  4. (1)
No up-shift (1st --> 2nd) 2nd brake (B3 ) (1)
No up-shift (2nd --> 3rd)
  1. 3rd brake (B2 )
  2. One-way clutch No.1 (F1 )
  1. (1)
  2. (1)
No up-shift (3rd --> 4th) Direct clutch (1)
No up-shift (4th --> 5th) O/D brake (B0 ) (1)
No lock-up or No lock-up off Torque converter clutch TORQUE CONVERTER CLUTCH AND DRIVE PLATE
Harsh engagement (N --> D)
  1. Forward clutch (C1 )
  2. O/D one-way clutch (F0 )
  3. One-way clutch No.2 (F2 )
  1. (1)
  2. (1)
  3. (1)
Harsh engagement (N --> R)
  1. Direct clutch (C2 )
  2. O/D brake (B0 )
  3. 1st & reverse brake (B4 )
  1. (1)
  2. (1)
  3. (1)
Harsh engagement (1 --> 2) 2nd brake (B3 ) (1)
Harsh engagement (2 --> 3)
  1. 3rd brake (B2 )
  2. 2nd brake (B3 )
  3. One-way clutch No.1 (F1 )
  1. (1)
  2. (1)
  3. (1)
Harsh engagement (3 --> 4) Direct clutch (C2 ) (1)
Harsh engagement (4 --> 5th)
  1. O/D brake (B0 )
  2. O/D direct clutch (C0 )
  1. (1)
  2. (1)
Harsh engagement (Lock-up) Torque converter clutch TORQUE CONVERTER CLUTCH AND DRIVE PLATE
Slip or shudder (Forward and reverse: After warm-up)
  1. O/D one-way clutch (F0 )
  2. O/D direct clutch (C0 )
  3. Torque converter clutch
  1. (1)
  2. (1)
  3. -
Slip or shudder (Particular position: Just after engine starts) Torque converter clutch TORQUE CONVERTER CLUTCH AND DRIVE PLATE
Slip or shudder (R position)
  1. Direct clutch (C2 )
  2. O/D brake (B0 )
  3. 1st & reverse brake (B4 )
  1. (1)
  2. (1)
  3. (1)
Slip or shudder (1st)
  1. Forward clutch (C1 )
  2. No. 2 one-way clutch (F2 )
  1. (1)
  2. (1)
Slip or shudder (2nd) 2nd brake (B3 ) (1)
Slip or shudder (3rd)
  1. 3rd coast brake (B1 )
  2. 3rd brake (B2 )
  3. One-way clutch No.1 (F1 )
  1. (1)
  2. (1)
  3. (1)
Slip or shudder (4th) Direct clutch (1)
Slip or shudder (5th) O/D brake (B0 ) (1)
No engine braking (1st +/- 4th: D position) O/D direct clutch (Co) (1)
No engine braking (1st: L position) 1st & reverse brake (B4 ) (1)
No engine braking (2nd: 2 position) 2nd brake (B3 ) (1)
No engine braking (3rd: 3 position) 3rd coast brake (B1 ) (1)
Poor acceleration (All positions) Torque converter clutch TORQUE CONVERTER CLUTCH AND DRIVE PLATE
Poor acceleration (5th)
  1. O/D brake (B0 )
  2. O/D planetary gear unit
  1. (1)
  2. (1)
Engine stalls when starting off or stopping Torque converter clutch TORQUE CONVERTER CLUTCH AND DRIVE PLATE
(1) See OVERHAUL - A-650E
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