Chrysler DODGE D150 1993 Service Manual page 1221

21 - 220 TRANSMISSION OVERHAUL—36RH/37RH
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VALVE BODY CLEANING AND INSPECTION
The only serviceable valve body components are
the:
• park lock rod and E-clip
• switch valve and spring
• pressure adjusting screw bracket
• throttle valve lever
• manual shaft
• manual shaft seal/washer/E-clip/detent ball
• fluid filter.
The remaining valve body components are serviced
only as part of a complete valve body assembly (Fig.
92).
Clean the valve body components in a parts clean­
ing solution only. Do not use gasoline, kerosene, or
any type of caustic solution.
Dry the parts with compressed air. Make sure all
passages are clean and free from obstructions.
Do not use rags or s h o p t o w e l s to dry or w i p e
off valve b o d y c o m p o n e n t s unless they are m a d e
from lint free material. Lint will adhere to the
valve b o d y c o m p o n e n t s causing valve bind. Lint
can also clog filters a n d small fluid p a s s a g e s .
Inspect the throttle and manual valve levers and
shafts. D o not attempt to straighten a bent shaft
or correct a loose lever. Replace these compo­
nents if worn, b e n t , loose o r d a m a g e d in any
way.
Inspect all of the valve body mating surfaces for
scratches, nicks, burrs, or distortion. Use a straight­
edge to check surface flatness. Minor scratches may
be removed with crocus cloth using only very light
pressure.
Minor distortion of a valve body mating surface
may be corrected by smoothing the surface with cro­
cus cloth. Position the crocus cloth sheet on a surface
plate, sheet of plate glass, or equally flat surface. If
distortion is severe or any surfaces are heavily
scored, the valve body will have to be replaced.
C A U T I O N : The throttle valve, shuttle valve plug, 1-2
shift valve and 1-2 governor plug are made of
coated aluminum. Aluminum components can be
identified by the dark color of the special coating
applied to the surface (or by testing with a magnet).
D O N O T polish or sand aluminum valves or plugs
with any type of material, or under any circum­
stances. This practice will remove the special coat­
ing and cause the valves and plugs to stick and
bind.
Inspect the valves and plugs for scratches, burrs,
nicks, or scores. Also inspect the coating on the alu­
minum valves and plugs. If the coating is damaged
or worn through, the valve (or valve body) should be
replaced.
Aluminum valves and plugs must not be sanded or
polished under any circumstances. However, minor
burrs or scratches on steel valves and plugs can be
removed with crocus cloth but do not round off the
valve or plug edges. Squareness of these edges is vi­
tally important; they prevent foreign matter from
lodging between the valves and plugs and the bore.
Inspect all the valve and plug bores in the valve
body. Use a penlight to view the bore interiors. Re­
place the valve body if any bores are distorted or
scored. Inspect all of the valve body springs. The
springs must be free of distortion, warpage or broken
coils.
Trial fit each valve and plug in its bore to check
freedom of operation. When clean and dry, the valves
and plugs should drop freely into the bores.
Valve body bores do not change dimensionally with
use. If the valve body functioned correctly when new,
it will continue to operate properly after cleaning
and inspection. It should not be necessary to replace
a valve body assembly unless it is damaged in han­
dling.
VALVE BODY ASSEMBLY
C A U T I O N : D o not force the valves or plugs into
place during reassembly. If the valve body bores
and the valves and plugs are free of distortion or
burrs, the valves and plugs should slide into place
easily. In addition, d o not overtighten the transfer
plate and valve body screws during reassembly.
Overtightening can distort the valve body resulting
in valve sticking, c r o s s leakage and unsatisfactory
operation. Tighten the screws alternately and
evenly to 4 Nnn (35 in. lbs.) torque only.
(1) Lubricate valve body bores, valves and plugs
with ATF Plus, or Dexron II™ transmission fluid.
(2) Insert rear clutch check ball in transfer plate
and install filter in separator plate (Fig. 93).
SEPARATOR TRANSFER
PLATE PLATE
FILTER BALL J9121-82
Fig. 93 Installing Filter and Rear Clutch Check
Bali—36RH/37RH