ok, so i'm losing tranny fluid, probably 1 quart a week... weird thing is, there's no puddling in my driveway... no apparent drips anywhere after i park. i figure it's losing fluid while in motion? what can cause this? any pressure weak points? i may have gone up some steep grades but i really don't recall, can this be a simple leak?

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85 190E 2.3(SOLD)
86 230E (-->300D) sold
87 300D (-->300TD) sold
68 250S w/ a 615 and manual tranny (RIP)
87 300TD (SOLD)
95 S280 "The KRAKEN" (Turbo 2.9 602 transplant) traded
86 190E 2.3... current project