A shop charges by the hour, and "the book" for this repair is about an hour. The seal is $10 or so. Make a few calls and compare rates, and ask about how soon they can do the work and what kind of warranty they offer on the repair.
A transmission mount may have gotten soaked with fluid, and the situation cited might necessitate replacing that as well. Maybe $30 there, and it can be put in when the seal is replaced since the mechanic is right there. Add .1 or .2 hours for the mount. Again, call a few shops and tell 'em what you have observed and ask what's up.
Drop the lower transmission pan Clean pan Replace filter and gasket
The transmission in a 2000 Astro is a 4L60E.
700R4 transmission.
4L60 or 4L60E
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Nothing, it's discontinued.
Inside transmission pan beside valve body.
Fluid is added through the transmission dipstick.
figuratively yes but unadvisable
the pump is in side the fule tank drop tank replace pump get a astro van manual