C H A P 2, SEC V
T O R Q U E P A T H S
P A R 5 3
Figure 29. First-gear, full-right-steer torque path, converter operation
53. TORQUE PATH
-
F I R S T G E A R,
FULL-RIGHT STEER, CONVERTER
OPERATION (fig. 29)
a . T o r q u e i s t r a n s m i t t e d t o t h e s t e er
planetary ring gears in the same manner as
that for first gear, as described in par. 47a
a n d b , above. From this point, to the power
train outputs, the torque paths for the right
and left sides are different.
b . T h e c l u t c h - b r a k e m e t h o d i s u s e d f or
f i r s t - g e a r s t e e r . S t e e r i n g r e s u l t s w h e n t he
brake is applied at one side while the drive
c l u t c h i s e n g a g e d a t t h e o p p o s i t e s i d e . T he
d r i v e c l u t c h i s t h e g e a r e d s t e e r c l u t c h . T he
vehicle steers toward the braked side.
c . In right steer, in first gear, the right
5
6
brake is applied while the right-drive clutch
is released. The drive clutch on the left side
is still engaged and continues to drive. Hy-
draulic action, controlled by the steer control
v a l v e , r e l e a s e s t h e d r i v e c l u t c h a n d a p p l i es
the brake. An opposite movement of the steer
control valve will release the left-geared steer
clutch (the drive clutch), apply the left brake,
and result in left steer.
d . In full steer, the applied brake locks
the steer planetary carrier and rotation stops
a t t h a t s i d e . I n p a r t i a l s t e e r , t h e a p p l i ed
b r a k e o n l y s l o w s t h e s i d e t o w a r d w h i c h t he
t u r n i s m a d e . T h e d e g r e e o f s t e e r i s c o n-
trolled by the degree of movement of the steer
c o n t r o l . R e f e r t o T A B U L A T E D D A T A , p a r.
7, for the gear ratios which apply to first gear,
full-right steer.
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