Dodge ram truck 3500 1996 Service Manual page 1484

21 - 94 NV4500 MANUAL TRANSMISSION
CLEANING ANB I N S P E C T I O N fContinued)
Inspect the drive gear and bearings (Fig. 174).
Minor scratches and burrs on the gear surfaces can
be reduced with an oil stone and 400 grit paper wet­
ted with oil. Replace either bearing i f worn, or dam­
aged. Replace the gear i f any teeth, splines, or
bearing surfaces are also worn or damaged.
MAINSHAFT
PILOT
BEARING
FRONT
BEARING
with oil. However, replace the shaft as an assembly If
the forward gear Is loose, or any of the teeth are
worn, cracked, broken, or severely chipped.
Be sure to check condition of the countershaft bear­
ing cups. Replace either bearings cup i f worn, or
damaged.
REAR
BEARING
COUNTERSHAFT
FRONT
BEARING
J 9 2 2 M 8 1
J 9 2 2 M 8 4
Fig, 174 Drive Gear Components
Inspect the front bearing retainer and bearing cup
(Fig. 175). Replace the bearing cup i f scored, cracked,
brinnelled, or rough. Check the release bearing slide
surface of the retainer carefully. Minor corrosion,
nicks, or pitting can be smoothed with 400 grit emery
and polished out with crocus cloth. Wet the abrasive
paper and crocus cloth with oil when smoothing/pol­
ishing. Replace the retainer i f worn or damaged in
any way. Do • not reuse the original retainer
bolts. Install new bolts during assembly.
BEARING
CUP
FRONT BEARING
RETAINER
Fig. 176 Countershaft And Bearings
Check condition of the mainshaft. Inspect all the
bearing surfaces, splines and threads. Also check con­
dition of the snap ring grooves in the hub area and
the speedometer drive gear teeth (Fig. 177). Minor
scratches or burrs can be removed with an oil stone
and polished with crocus cloth. However, replace the
shaft i f any surfaces exhibit considerable wear or
damage.
BEARING
SURFACES
HUB BEARING NUT
SURFACES THREADS
SPEEDOMETER
TEETH
SPLINES
SPLINES
SPLINES
J9221-185
J 9 2 2 M 8 2
Fig. 175 Front Bearing Retainer Components
Inspect the countershaft and bearings (Fig. 176).
Replace the bearings i f worn, rough, flat spotted, or
heat checked. Check the countershaft gear teeth
carefully. Small nicks, scratches, or burrs can be
removed with an oil stone and 400 grit paper wetted
Fig. 177 Mainshaft Bearing And Spline Surfaces
Check condition of the gear case and extension or
adapter housing. Be sure the alignment dowels in the
case top surface and i n the housing/adapter are tight
and in good condition.
Run a tap through the gear case bolt holes i f the
threads need minor cleanup. Helicoil inserts can be