Subaru XT 1988 Service Manual page 585

AUTOMATIC TRANSMISSION AND DIFFERENTIAL
3-2
5) D-RANGE FOURTH SPEED (D
4 )
• During acceleration, the high clutch is applied and connects
the input shaft to the front planetary carrier. Also, the
forward clutch is applied, but it runs idle due to the one·
way clutch (3·4) and takes no part in power transmission.
Power is transmitted from the input shaft to the front
planetary carrier by the function of the high clutch.
Operating condition of parts
•
High clutch : Applied
•
Brake band
: Contracted
•
Forward clutch Applied
(Takes no part in power transmission.)
•
•
When the front planetary carrier turns normally, because
the front sun gear is held stationary by the brake band, the
speed of the front internal gear increases and is delivered
to the meshing reduction drive shaft in normal rotation.
• While coasting, because power transmission does not go
through the one-way clutch, reverse power is transmitted
to the engine and engine braking is performed.
Power flow (in acceleration)
•
Input shaft
~
•
High clutch
~
•
Front planetary carrier
~
•
Front pinion gear
,
•
Front internal gear
~
•
Rear planetary carrier
~
•
Reduction drive shaft
+
•
Reduction gear
+
I
+
Drive pinion
• Transfer clutch
•
t
Front differential
•
Rear differential
Front planetary gear Rear planetary gear
Input shaft
Front differential
Fig. 95
@ ~ ~o
One-way clutch (3-4) One-way clutch
(1-2)
o
0 0
~o
3
~
o Constant free rotating
r
, , s p e e d : A
>
B
I
L ________ __ ~~-_-~~=~-; ~
r------.J
Note:
1IIIIIIII
Locked
D
Input
_Output
High clutch
I
I
I
Front internal gear
69
L3-675