Dodge RAM TRUCK 1500 1995 Service Manual page 1499

21 - 218 4§ftH/47RK TRANSMISSION OVERHAUL
burned, flaking off, or worn to the point where the
grooves in the lining material are no longer visible.
Inspect the servo components. Replace the springs
if collapsed, distorted or broken. Replace the guide,
rod and piston if cracked, bent, or worn. Discard the
servo snap ring if distorted or warped.
Check the servo piston bore for wear. If the bore is
severely scored, or damaged, it will be necessary to
replace the case,
Replace any servo component if in doubt about its
condition. Do not reuse suspect parts.
FRONT SERVO PISTON OVERHAUL (FIG. §6}
. (1) Remove seal ring from rod guide.
(2) Remove small snap ring from servo piston rod.
Then remove piston rod, spring and washer from pis­
ton.
(3) Remove and discard servo component O-ring
and seal rings.
(4) Lubricate new O-ring and seal rings with petro­
leum jelly and install them on piston, guide and rod.
(5) Install rod in piston. Install spring and washer
on rod. Compress spring and install snap ring.
(6) Set servo components aside for installation dur­
ing transmission reassembly.
PISTON RINGS (2)
r
*fef:\.
SERVO PISTON
PISTON ROD:
SPRING
WASHER
SNAP RING
PISTON ROD GUIDE
PISTON ROD
(A-727 ONLY)
SERVO SPRING
SE.
Check rear band condition. Replace the band if dis­
torted, the lining is burned or flaking off, or the lin­
ing is worn (grooves no longer visible at any point on
the lining material). If doubt exists about the condi­
tion of any servo component, replace it. Do not reuse
suspect parts.
REAM SERVO PISTON OVERHAUL ( F K 1 . 5T}
(1) Remove small snap ring and remove plug and
spring from servo piston.
(2) Remove and discard servo piston seal ring.
(3) Lubricate piston and guide seals with petro­
leum jelly. Lubricate other servo parts with Mopar
ATF Plus transmission fluid.
(4) Install new seal ring on servo piston.
(5) Assemble piston, plug, spring and snap ring.
(6) Lubricate piston seal lip with petroleum jelly.
(7) Set servo components aside for assembly instal­
lation.
SPRING
RETAINER
SERVO
SPRING
PISTON
PLUG
CUSHION
SPRING
SERVO
SNAP
RING
SNAP
RH307
PISTON
SEAL
PISTON
PLUG
SNAP
RING
SERVO
PISTON
J9121-173
wo Asset
REAR SERVO AND IAND OVERHAUL
The 46RH and 47RH rear servo and band compo­
nents are different. The 46RH has a single wrap rear
band, while the 47RH has a heavy duty double wrap
band. The rear servo spring retainer is also different
for the two transmissions. The 46RH has a cup type
retainer while the 47RH has a flat retainer and
slightly longer spring. However, inspection, cleaning
and service procedures are the same for each.
Clean the .servo components with solvent and dry
them with compressed air. Inspect the servo compo­
nents. Replace the spring if collapsed, distorted or
broken. Replace the plug and piston if cracked, bent,
or worn. Discard the servo snap ring if distorted or
warped.
Fig. 57 Rear Servo Assembly
OIL PUMP AND REACTION SHIFT SUPPORT
OVERHAUL
(1) Mark position of support in oil pump body for
assembly alignment reference. Use scriber or paint to
make alignment marks.
(2) Place pump body on two wood blocks.
(3) Remove reaction shaft support bolts and sepa­
rate support from pump body (Fig. 58).
(4) Remove pump inner and outer gears (Fig. 59).
(5) Remove O-ring seal from pump body (Fig. 60).
Discard seal after removal.
(6) Remove oil pump seal with Remover Tool
C-3981. Discard seal after removal.