Dodge D150 1990 Service Manual page 958

• AUTOMATIC TRANSMISSION 21-107
SNAP RING SPRING RETAINER RH308
Fig. 35 Rear (Low-Reverse) Servo Components—All
FRONT SERVO ASSEMBLY
(1) Lubricate the seal rings and O-rings w i t h petro-
l e u m j e l l y . Lubricate t h e other servo parts w i t h
transmission fluid.
(2) I n s t a l l a new O - r i n g on t h e piston rod.
(3) I n s t a l l a new seal on the piston rod guide and
i n s t a l l new seal r i n g s on the the piston.
(4) Assemble the rod, piston, servo springs, washer
(727 only) and the snap r i n g (Fig. 34).
REAR (LOW-REVERSE) SERVO AND BAND—All
(1) Dissassemble the servo piston, plug, spring and
retainer (Fig. 35).
(2) Remove and discard the servo piston seal r i n g .
Rear Servo And Band Inspection
Clean t h e servo components w i t h solvent and dry
t h e m w i t h compressed a i r .
Inspect the servo components. Replace the spring i f
collapsed, distorted or broken. Replace the p l u g and
piston i f cracked, bent, or w o r n . Discard t h e servo
snap r i n g i f distorted or warped.
Check rear band condition. Replace the band i f dis-
torted, the l i n i n g is b u r n e d or flaking off, or the l i n -
i n g is w o r n (grooves no longer visible at any point on
band).
I f doubt exists about t h e condition of any servo
component, replace i t . Do not reuse suspect parts.
ASSEMBLING LOW-REVERSE SERVO
(1) L u b r i c a t e the piston and guide seals w i t h petro-
l e u m j e l l y . L u b r i c a t e t h e other servo parts w i t h
transmission fluid.
(2) I n s t a l l a new seal r i n g on the piston (Fig. 35).
(3) Assemble the piston, p l u g and snap r i n g (Fig.
35) .
TRANSMISSION ASSEMBLY
FRONT/REAR SERVO INSTALLATION
(1) L u b r i c a t e the f r o n t servo bore i n the transmis-
sion case w i t h transmission fluid. T h e n i n s t a l l t h e
front servo assembly i n the bore w i t h a t w i s t i n g mo-
t i o n . Compress the servo w i t h tool C-3422-A. Secure
the servo w i t h a new snap r i n g and remove t h e com-
pressor tool.
(2) L u b r i c a t e the rear servo bore i n t h e t r a n s m i s -
sion case w i t h transmission fluid. T h e n i n s t a l l t h e
rear servo assembly i n t h e case bore w i t h a t w i s t i n g
motion. Compress the servo w i t h tool C-3422-A. Se-
cure the servo w i t h a new snap r i n g and remove t h e
compressor tool.
OVERRUNNING CLUTCH INSTALLATION
(1) Place t h e transmission case i n a n u p r i g h t posi-
t i o n .
(2) I n s t a l l t h e o v e r r u n n i n g clutch h u b , rollers and
springs. L u b r i c a t e the h u b , rollers and springs w i t h
transmission fluid.
REAR BAND AND LINKAGE
INSTALLATION-A-727
(1) Assemble t h e lever, p i n and l i n k and anchor
(Fig. 36).
(2) I n s t a l l a new O-ring on the rear band p i n (Fig.
36) .
(3) Position the rear band i n the case.
(4) I n s t a l l t h e short s t r u t . Then connect t h e l i n k
and anchor t o the band. Be sure the l i n k and anchor
are i n s t a l l e d as shown i n Figure 36.
(5) T i g h t e n t h e band adjuster screw j u s t enough to
hold the s t r u t i n place.
(6) I n s t a l l t h e low-reverse d r u m . Then verify t h a t
the l i n k does not touch the d r u m ( i f i t does, l i n k and
anchor are i m p r o p e r l y installed).
DOUBLE WRAP REAR BAND
INSTALLA TION-A-998/999
(1) I n s t a l l a new O-ring on the band reaction p i n
and l u b r i c a t e t h e p i n w i t h transmission fluid ( F i g .
37) .
(2) Push t h e reaction p i n into the case u n t i l i t is
flush w i t h t h e gasket surface.
(3) Position t h e double wrap band i n t h e case so
t h e band lugs are r e s t i n g against the reaction p i n
(Fig. 38).