Cadillac 1967 VVI Data Book page 96

Turbo Hydra-Matic Transmission
The Cadillac Turbo Hydra-Matic transmission gives the Cadillac owner
the greatest smoothness, flexibility and responsiveness ever achieved in a
motor ear. For 1967, drive away smoothness has been further increased by
raising the torque ratio of the torque converter unit. A major advantage of
Turbo Hydra-Matic is the use of a variable stator in the torque converter.
When the accelerator is depressed about halfway the pitch of the stator
vanes is designed to deliver maximum torque (and acceleration). Less
depression of the accelerator pedal reduces the pitch of the stator vanes
with a corresponding reduction in torque. This latter condition is desir-
able for precise maneuvering in parking, to prevent creeping at idle and
for less urgent acceleration. Engine braking, provided in either of the two
Drive Ranges and in Low Range, offers three choices to meet varying
grades of descent. (Fixed-stator on Seventy-Five body styles).
Left-hand
DRIVE
position gives maximum cruising economy, quietness and
slower engine speeds. At the same time, acceleration as desired is available
from the fluid-smooth thrust of the torque converter alone, or, by depress-
ing the accelerator pedal further, by engaging a lower gear.
Right-hand
DRIVE
position locks out high gear and utilizes the Inter-
mediate gear for maximum responsiveness. This position is often preferred
in mountain driving for climbing steep slopes and for increased engine
braking on the down grades.
G-5