TM 10-3930-669-20 2-15.  TRANSMISSION TROUBLESHOOTING (CONT). 2.  TRANSMISSION MALFUNCTIONS IN FORWARD. INITIAL SETUP Tools and Special Tools References Tool Kit, General Mechanic's: Automotive TM 10-3930-669-10 (Item 1, Appendix B) LO 10-3930-669-12 STE/ICE-R (Item 14, Appendix B) Pressure Test Kit (Item 2, Appendix B) Materials/Parts Equipment Condition Oil, Lubricating (MIL-L-2104) MAIN POWER switch OFF (TM 10-3930-669-10) (Item 25, Appendix C) Engine OFF (TM 10-3930-669-10) Parking brake applied (TM 10-3930-669-10) Personnel Required Two KNOWN INFO Transmission control switches OK. Transmission operates normally in neutral and reverse. Transmission oil temperature gauge OK. Tachometer OK. Transmission forward solenoid OK. POSSIBLE PROBLEMS Clutch seized. Transmission oil leaks. Transmission oil level low. Low transmission oil pressure. Internal transmission oil leaks. Engine idle speed too high. Transmission oil pressure too high. Clutch plates warped. Broken, pitted, or cracked gear teeth. TEST OPTIONS Visual inspection. REASON FOR QUESTION If   forklift   fails   to   move   forward when  transmission  control  lever  is set to forward position, clutch may be seized. 2-298