Dodge RAM TRUCK 1500 1995 Service Manual page 1544

BR 42RH/46RH/47RH OVERDRIVE UNIT OVERHAUL 21 - 263
ficient quantity of lint (from shop towels, cloths, rags,
etc.) could plug the transmission filter and fluid pas­
sages.
Discard the old case gasket and seals. Do not at­
tempt to salvage these parts. They are not reusable.
Replace any of the overdrive unit snap rings if dis­
torted or damaged.
Minor nicks or scratches on components can be
smoothed with crocus cloth. However, do not attempt
to reduce severe scoring on any components with
abrasive materials. Replace severely scored compo­
nents; do not try to salvage them.
Check condition of the park lock components and
the overdrive case (Fig. 86).
Replace the case if cracked, scored, or damaged.
Replace.the park lock pawl, plug, or spring if worn or
damaged. Be sure the bullet at the end of the park
lock rod is in good condition. Replace the rod if the
bullet is worn or the rod itself is bent or distorted.
Do not attempt to straighten the rod.
Check the bushings in the overdrive case. Replace
the bushings if severely scored or worn. Also replace
the case seal if loose, distorted, or damaged.
Examine the overdrive and direct clutch discs and
plates (Fig. 34). Replace the discs if the facing is
worn, severely scored, or burned and flaking off. Re­
place the clutch plates if worn, heavily scored, or
cracked. Check the lugs on the clutch plates for wear.
The plates should slide freely .in the drum. Replace
the plates or drum if binding occurs.
Check condition of the annulus gear, direct clutch
hub, clutch dram and clutch spring (Fig. 34). Replace
the gear, hub and, drum if worn or damaged. Replace
the spring if collapsed, distorted, or cracked.
Be sure the splines and lugs on the gear, drum and
hub are in good condition. The clutch plates and
discs should slide freely in these components.
Inspect the thrust bearings and spring plate (Fig.
34). Replace the plate if worn or scored. Replace the
bearings if rough, noisy, brinnelled, or worn.
Inspect the planetary gear assembly and the sun
gear and bushings (Fig. 34). If either the sun gear or
the bushings are damaged, replace the, gear and
bushings as an assembly. The gear and bushings are
not serviced separately.
The planetary carrier and pinions must be in good
condition. Also be sure the pinion pins are secure and
in good condition. Replace the carrier if worn or dam­
aged.
Inspect the overrunning clutch and race. The race
surface should be smooth and free of scores. Replace
the overrunning clutch assembly or the race if either
assembly is worn or damaged in any way.
Inspect the output shaft and governor components
(Fig. 36). Replace the shaft pilot bushing and inner
OVERDRIVE
CLUTCH
. PISTON
RETAINER
SPRING
PLATE
THRUST
BEARING
SUN
GEAR
PLANETARY GEAR OVERRUNNING CLUTCH
OUTER
RETAINING RING
DIRECT CLUTCH
DRUM
INNER
RETAINING RING
OVERDRIVE
CLUTCH PISTON
PISTON
THRUST
PLATE
(SELECTIVE
PISTON
THRUST
BEARING
CLUTCH HUB
SNAP RING
DIRECT CLUTCH
SNAP RING
CLUTCH PACK
RETAINING
RING
OVERDRIVE
CLUTCH PACK
REACTION
PLATE
REACTION
SNAP RING
J 9 5 2 M 3 1
Fig. 34 Overdrive Geartrain Components (42RH Shown)