73 Worn Out/Burnt Transaxle Fluid

THEORY OF OPERATION:
While in 3rd or 4th gear FEMCC and just before the A/C clutch engages, the Powertrain Control Module (PCM) requests the Transmission Control Module (TCM) to momentarily establish PEMCC operation. If vehicle shudder is detected during the FEMCC to PEMCC transition, a counter is incremented. If the count reaches 20, the trouble code is set. The driver may then notice harsh bumps when the A/C clutch is being cycled, but vehicle shudder will be eliminated. After 35 OBDII warm-up starts or if the code is cleared, PEMCC will be reactivated to see if shudder is still present. If one shudder event occurs, the code will be reset. Clearing the code and running battery disconnect with the DRB is the only way to reset the shudder counter from 20 back to zero.

The code will be set if the vehicle shudder is detected 20 times when the A/C clutch is cycled.

LIMP-IN:
NO

WHEN MONITORED/SET CONDITIONS:
At every Fully Electronically Modulated Converter Clutch (FEMCC) to Partial Electronically Modulated Converted Clutch (PEMCC) transition when A/C compressor clutch is being cycled.

TRANSMISSION EFFECTS:
This code does not cause the transmission to go into limp-in mode. However, once the code is set, FEMCC to PEMCC operation before the A/C clutch engagement will be disabled for 35 OBDII warm up starts.

POSSIBLE CAUSES:
- Degraded transmission fluid (Use MS7176 only)
- Wheels severely out of alignment
- Internal torque converter problem