Dodge D150 1990 Service Manual page 939

21 - 88 AUTOMATIC TRANSMISSION
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The starter ring gear is mounted directly on the
outer diameter of the torque converter front cover.
Gear replacement is as follows:
RING GEAR REMOVAL
(1) C u t through weld material at rear side of ring
gear w i t h a hack saw or grinding wheel. B e careful
not to cut or grind into front cover stamping.
(2) Scribe heavy line on front cover next to front
face of ring gear. L i n e is needed to properly locate
new gear on converter.
(3) Support torque converter on front cover with
blocks of wood (Fig. 2) Position blocks adjacent to
converter lugs to avoid altering lug position. T h e
torque c o n v e r t e r m u s t n o t r e s t o n t h e front
c o v e r h u b d u r i n g this operation.
(4) U s i n g blunt chisel or drift and a hammer, tap
downward on ring gear near welded areas to break
any remaining weld material (Fig. 2).
(5) T a p around ring gear until it comes off the
torque converter.
(6) Smooth off weld areas on the cover with a file.
Fig. 2 Removing Starter Ring Gear
RING GEAR INSTALLATION
(1) Heat and expand the new starter ring gear for
installation on the converter. A n y of the following
methods are acceptable:
(a) Oven: Place gear i n oven and set tempera-
ture at 200° F (93° C) Allow ring gear to remain i n
oven for 15 to 20 minutes.
(b) Boiling Water: Place ring gear i n shallow
container. Add water and heat for approximately
eight minutes after water has come to a boil.
(c) Steam: Place ring gear on a flat surface and
direct a steam flow around gear for approximately
2 minutes.
(d) Flame: Place ring gear squarely on a flat
surface. Using a medium size tip, direct a slow
flame evenly around inner r i m of the gear. Do not
apply flame to the gear teeth. Place a few drops of
water on face of gear at intervals during heating
process. When gear is hot enough to just boil the
water, gear is ready for installation.
(2) After ring gear is expanded by heating, imme-
diately place gear i n position on converter front
cover.
(3) Quickly tap gear onto cover evenly with plastic
or rawhide mallet. Continue tapping gear until face
of gear is even with scribe line (made during r e -
moval) on the front cover.
(4) Before proceeding, make sure gear is even with
scribed line around full circumference of the front
cover.
(5) The following suggestions are offered as a n aid
in welding the new ring gear to the converter. D o
not g a s w e l d w i t h o x y - a c e t y l e n e equipment. U s e
a D.C. welder set at straight polarity, or use an A . C .
welder i f the proper electrode i s available. U s e a 3
mm (1/8 inch) diameter welding rod and a welding
current of 80 to 125 amps. Direct the arc at the i n -
tersection of the gear and front cover from a n angle
of 45 degrees from the rear face of the gear.
(6) Weld new ring gear to torque converter front
cover. Take care to place same amount of weld mate-
rial (or as nearly as possible) i n original weld loca-
tions. This is essential i n maintaining converter
balance. Position welds alternately on opposite sides
of converter and ring gear to minimize distortion.
(7) Inspect gear teeth and remove a l l nicks where
metal is raised, weld metal splatter, etc., i n order to
ensure quiet starter operation.
PUMP OIL SEAL
SEAL REPLACEMENT
The pump oil seal can be replaced without remov-
ing pump and reaction shaft support assembly from
the transmission case.
To remove the seal use remover tool C-3981 on A -
998/999 transmission, or tool C-3861 on A-727 trans-
mission. Thread the seal remover tool into the seal.
Then tighten the tool puller screw to withdraw the
seal (Fig. 3).
To install the seal, use driver handle C-4171 and
installer tool C-4193 (A-998/999) or installer tool C -
3860-A (A-727). Place the new seal i n the pump
opening with the seal lip facing inward. Then tap the
seal into place with the driver handle and installer
tool (Fig. 4).
CONVERTER AND DRIVE PLATE SERVICE
After the transmission has been removed, the drive
plate and torque converter can replaced or removed
for service access.
The torque converter is not a serviceable part. I f
the converter is contaminated or damaged i n any
way, it must be replaced as a n assembly. D o n o t a t -