TM  10-3930-643-34 TRANSMISSION  TROUBLESHOOTING  AND  MAINTENANCE.  (cont) 6-3. Torque Converter. (Sheet 2 of 9) TESTING 1. 2. 3. 4. 5. 6. Using an 11/16” open end wrench, install  pressure gage  at  clutch pressure tap in transmission and torque  converter. Using a 3/4” open end wrench, install pressure gage at torque converter charge pressure tap. Operate engine. NOTE Engine, torque converter and transmission should be at normal operating  temperature. Accelerate engine to 1000 to 1200 rpm with  transmission  in  neutral  for  not longer than three minutes. Do not exceed 1200 rpm. Using a pressure gage, check clutch pressure. Clutch  pressure  should  be 270 to 310 psi. If a minimum clutch pressure of 160 psi is not reached within  30  seconds  after engine is operating at low idle (675 to 700 rpm),  shut  down engine.  Do  not perform stall check test. Using a pressure gage, check torque converter  charge  pressure. Charge pressure should be 25 to 35 psi. Go to sheet 3 6-12