EVALUATION Problem | Possible cause (a) Stall speed low in D and R positions. • Engine output may be insufficient. • Stator one–way clutch is operating properly HINT: If more than 600 rpm below the specified value, the torque converter clutch could be faulty. (b) Stall speed high in D position. • Line pressure too low • Forward clutch slipping • No.2 one–way clutch not operating properly • O/D one–way clutch not operating properly (c) Stall speed high in R position. • Line pressure too low • Direct clutch slipping • First and reverse brake slipping • O/D clutch one–way clutch not operating properly (d) Stall speed high in D and R positions. • Line pressure too low • Improper fluid level • O/D one–way clutch not operating properly