Chrysler DODGE D150 1993 Service Manual page 1334

• OVERDRIVE UNIT OVERHAUL—42RH/46RH 21 - 333
Check the machined surfaces on the output shaft.
These surfaces should clean and smooth. Very minor
nicks or scratches can be smoothed with crocus cloth.
Replace the shaft if worn, scored or damaged in any
way.
Check condition of the governor components. Re­
place the governor drive seal rings if damaged. Be
sure the drive ring grooves are in good condition.
Check operation of the governor valve, weights and
shaft. The valves and weights should slide freely in
the governor body (Fig. 36).
There are t w o governor component changes in
current overdrive unit units. The first involves
the governor valve w h i c h is n o w m a d e of alumi­
num. The s e c o n d involves the output shaft
which h a s a spotface for governor valve end
clearance. The n e w aluminum valve is not inter­
changeable. It must only be u s e d w i t h an output
shaft that h a s the spotface for valve end clear­
ance.
Inspect the governor support and the two oil pres­
sure tubes (Fig. 36). The tubes are an integral
part of the support. D o not attempt to remove
them.
The oil tubes must not be pinched, kinked, col­
lapsed, or distorted. Blow them out with compressed
air to be sure they are clear. The tubes are designed
to be a slip fit in the piston retainer boss. Do not
modify the tube ends in an effort to make them fit
tighter.
Replace the governor support and the oil tubes as
an assembly if either component is damaged.
Check condition of the governor valve and weight
snap rings. Replace any snap ring t h a t appears bent
or distorted. Replace any snap ring if its condition is
doubtful.
Inspect the output shaft bushings (Fig. 37). The
small bushing is the intermediate shaft pilot bush­
ing. The large bushing is the overrunning clutch hub
bushing. Replace either bushing if scored, pitted,
cracked, or worn.
The bushings can be removed with "blind hole
puller tools" such as Snap-On set CG40CB for small
bushings and set CG46 for large bushings. New
bushings can be installed with tools from an all pur­
pose installer kit such as the Snap-On A257 bushing
driver set.
OVERDRIVE GEARTRAIN ASSEMBLY
(1) Lubricate geartrain components with Mopar
ATF Plus or Dexron II™ transmission fluid.
(2) Soak direct and overdrive clutch discs in trans­
mission fluid before installation.
(3) Install new pilot bushing and clutch hub bush­
ing in output shaft if necessary (Fig. 37). Lubricate
new (or old) bushings with petroleum jelly.
(4) Install front bearing and bearing snap ring on
output shaft (Fig. 38)
Fig. 37 Output Shaft Bushing Location
(5) Align and install annulus gear on output shaft
(Fig. 38).
(6) Install annulus snap ring (Fig. 38).
Fig. 38 Installing Annulus Gear And Snap Ring
(7) Align and install clutch drum on annulus gear
(Fig. 39). Be sure drum is engaged in annulus gear
lugs.
(8) Install clutch drum outer retaining ring (Fig.
31).
(9) Slide clutch drum forward and install inner re­
taining ring (Fig. 39).
(10) Install overrunning clutch on hub (Fig. 40).
Note that clutch only fits one w a y . Shoulder on
clutch should seat in small recess at e d g e of
hub.
(11) Install thrust bearing on overrunning clutch
hub (Fig. 41). Use generous amount of petroleum
jelly to hold bearing in place for installation. Bear­
ing fits one w a y only. Be sure bearing is seated
squarely against hub. Reinstall bearing if it d o e s
not seat squarely.