Can the torque converter on 1983 300d drain back into trans case overfilling the case and causing transmission to leak out of vent? My driveway has fairly steep incline and levels out for parking at bottom. I have noticed when parking on incline after a while trans fluid leaks and when starting up and backing up out of incline leaves a decent trail for 20 feet or so. Also if start up cold on level at bottom of driveway and immediately back up driveway leaves leak trail. Was at work today and had the thought it may be overfull so I went out and started engine pulled hood and checked dipstick it appeared considerably overfull so I wiped stick and checked twice more with same result on level parking lot. So I thought when I got home I would get some of the fluid out. Drove about twelve miles home checked fluid and it was right on top mark. Could trans pump possibly be lazy? Usually goes into drive or reverse within 1-2 seconds. Has no flaring or rough shifting issues. Thanks in advance for any help as it will all be appreciated. Also what a wonderful forum this site has.

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1983 300D 238K Miles