The oil level control is located on the electrohydraulic unit (4) and consists of the float (5) which is integrated into the electrohydraulic unit. The float is positioned to plug the opening (6) between the oil gallery (2) and gearset chamber (1) so that the rotating gearsets do not splash about in oil as the oil level rises. The oil level control reduces power loss and prevents oil from being thrown out of the transmission housing at high oil temperatures. See Fig. 182.
OPERATION FLUID LEVEL CONTROL With low oil levels, the lubricating oil which flows constantly out of the gearset, flows back to oil gallery (2) though the opening (6) If the oil level rises, the oil presses the float (5) against the housing opening (6). The float (5) therefore separates the oil gallery (2) from the gearset chamber (1). The lubricating oil which continues to flow out of the gearsets is thrown against the housing wall, incorporated by the rotating parts and flows back into the oil gallery (2) through the upper opening (arrow). See Fig. 183. DIAGNOSIS AND TESTING CAUSES OF BURNT FLUID Burnt, discolored fluid is a result of overheating which has three primary causes. Internal clutch slippage, usually caused by low line pressure, inadequate clutch apply pressure, or clutch seal failure. A result of restricted fluid flow through the main and/or auxiliary cooler. This condition is usually the result of a faulty or improperly installed drainback valve, a damaged oil cooler, or severe restrictions in the coolers and lines caused by debris or kinked lines. Heavy duty operation with a vehicle not properly equipped for this type of operation. download
