TM 10-3930-669-20 2.  TRANSMISSION MALFUNCTIONS IN FORWARD (CONT). KNOWN INFO Transmission control switches OK. Transmission operates normally in neutral and reverse. Transmission oil temperature gauge OK. Tachometer OK. Transmission forward solenoid OK. Clutch OK. Transmission is not leaking oil. Transmission oil level OK. Transmission oil pressure is not low. Transmission has no internal mechanical failures. Engine idle speed OK. Clutch plates OK. Gear teeth OK. POSSIBLE PROBLEMS Transmission oil pressure too high. KNOWN INFO Transmission control switches OK. Transmission operates normally in neutral and reverse. Transmission oil temperature gauge OK. Tachometer OK. Transmission forward solenoid OK. Clutch OK. Transmission is not leaking oil. Transmission oil level OK. Transmission oil pressure is not low. Transmission has no internal mechanical failures. Engine idle speed OK. Transmission oil pressure is not too high. POSSIBLE PROBLEMS Clutch plates warped. Broken, pitted, or cracked gear teeth. TEST OPTIONS REASON FOR QUESTION If transmission oil pressure is too high, transmission will engage too harshly. TEST OPTIONS Visual inspection. REASON FOR QUESTION If clutch plates are warped, forklift will move forward slowly when the transmission control lever is placed in the forward position. 2-306