[V8] Tranny fluid change

[Kneale Brownson]

I've been doing the step-by-step tranny fluid change in our '90 V8:  Drain
out four quarts or whatever comes out, add a gallon, drive some, repeat,
etc. until you've put in three gallons.  How far are you supposed to travel
between drainings?  I slugged through Audifans.com archives for the last
hour and couldn't find a reference I recall reading that suggested some
minimum distance between drainings.