Before beginning your road test, find and duplicate,
from a service manual, the chart (Figure 40-11) that
shows the band and clutch application for different gear
selector positions. Using these charts will greatly simplify
your diagnosis of automatic transmission problems. It is
also wise to have a notebook or piece of paper to jot down
notes about the operation of the transmission. If the
transmission is electronically controlled, take a scan tool on
the road test with you. It is an added convenience if the
scan tool has memory or a printer.