TM  10-3930-643-34 TRANSMISSION  TROUBLESHOOTING  AND  MAINTENANCE.  (cont) 6-2. Transmission  Troubleshooting.  (cont) MALFUNCTION TEST  OR  INSPECTION CORRECTIVE  ACTION f. LOSS OF POWER. (cont) Step 3. Check  for  improper  control  of  scheduling  valve  operation. Replace, refer to paragraph 6-8. If valve is functioning, proceed to Step 4. Step 4. Check  for  slipping  clutches. Refer to “Low Clutch Pressure” in this section. If transmission is fully operational, and loss of power continues, check parking and vehicle brakes. g. VEHICLE DRIVES IN ONE DIRECTION AND CREEPS IN THAT DIRECTION IN NEUTRAL BUT STALLS WHEN SHIFTED TO THE OPPOSITE DIRECTION. Failed range clutch. Replace  transmission,  refer  to  paragraph  6-6. h. VEHICLE DRIVES IN ONE RANGE, BUT STALLS WHEN SHIFTED TO ANOTHER RANGE. Failed range clutch. Replace  transmission,  refer  to  paragraph  6-6. i. ALL RANGE PRESSURES NORMAL IN  ONE DIRECTION BUT ALL LOW IN OPPOSITE DIRECTION. Internal oil leaks in forward or reverse clutch. Replace  transmission,  refer  to  paragraph  6-6. j  . LOW CLUTCH PRESSURE IN ONE RANGE (CLUTCH IN EITHER DIRECTION). Internal oil leaks in clutch. Replace  transmission,  refer  to  paragraph  6-6. 6-8