| 摘要 |
A transmission transfer case has a sump or reservoir that is lower than the main transmission sump or reservoir. A scavenge pump is provided to prevent excess fluid storage in the transfer case during normal vehicle operation by transferring the fluid stored therein to the main transmission sump. During normal operation and vehicle towing, an output driven pump is provided to supply lubricating fluid to the transfer case components. A control valve, actuated by a signal from the main transmission control, directs fluid to the output driven pump from the main transmission sump during normal operation and from the transfer case sump during towing operation. The control valve also connects the scavenge pump with the transfer case during normal operation. A single supply passage is connected between the transfer case sump and the control valve.
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