Hi,

   I have a '92 d150 5.2L automatic with about 202,000 miles on it.  I'm
getting a very rough 1-2 upshift under normal to light acceleration.  When
you get on the gas a little more, it usually shifts more smoothly.  Also
when shifting from park to drive or reverse it is pretty clunky.  Otherwise
it works fine and upshifts/downshifts when it should.
   I am planning to adjust kickdown and low/reverse bands as per Haynes
manuals reccomendation and possibly the throttle rod as well.
   I am just curious as to what each of these adjustments actually
controls.  Haynes manuals and google searches just turn up directions for
adjusting, but don't give a lot of info on why.  I'd appreciate it if you
could let me know whether or not these adjustments may improve things or
point me to a web site with some more in-depth info on the subject.

Thanks