I think I've asked this question before; but what exactly are the POWER
DRIVE and WINTER DRIVE switches for in this vehicle. What exactly do they
do in terms of transmission operation?

Also, in my 1995 Passport, the WINTER DRIVE switch works intermittently and
only on very rainy or snowy days, leading me to believe that there is some
sensor in play here. Is this true?

TIA

AARON