Inspection After Removal

Check foreign materials in oil pan to help determine causes of malfunction. If the ATF is very dark, smells burned, or contains foreign particles, the frictional material (clutches, band) may need replacement. A tacky film that will not wipe clean indicates varnish build up. Varnish can cause valves, servo, and clutches to stick and can inhibit pump pressure.
- If frictional material is detected, perform A/T fluid cooler cleaning. Refer to "CLEANING ".
  
  Fig 1: Identifying Foreign Material
  Courtesy of NISSAN MOTOR CO., U.S.A.
Check torque converter one-way clutch using a check tool as shown at figure.

Insert a check tool into the groove of bearing support built into one-way clutch outer race.
When fixing bearing support with a check tool, rotate one-way clutch spline using a screwdriver.
Make sure that inner race rotates clockwise only. If not, replace torque converter assembly.

Fig 2: Checking Torque Converter One-Way Clutch Using Check Tool
Courtesy of NISSAN MOTOR CO., U.S.A.