Dodge RAM TRUCK 1500 1995 Service Manual page 1354

B R NV4500 MANUAL TRANSMISSION 21 - 71
BEARING
CUP
FRONT BEARING
RETAINER
BEARING
SURFACES
HUB
J922M82
Fig. 77 Front Bearing Retainer Components
REAR
BEARING
COUNTERSHAFT
FRONT
BEARING
J9221-184
Fig. 78 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. 79). Minor
scratches or burrs can be removed with an oil stone
and polished with crocus cloth. However, replace the
shaft if any surfaces exhibit considerable wear or
damage.
Check condition of the gear case and extension or
adapter housing (Fig. 80). Be sure the alignment
dowels in the case top surface and in the housing/
adapter are tight and in good condition.
Run a tap through the gear case bolt holes if the
threads need minor cleanup. Helicoil inserts can be
used to repair seriously damaged threaded holes if
necessary.
Be sure all case and housing/adapter sealing and
mating surfaces are free of burrs and nicks. This is
especially important as gaskets are not used in the
NV4500. Minor nicks and scratches on the sealing
surfaces can be dressed off with a fine tooth file or oil
stone.
BEARING
SURFACES
NUT
THREADS
SPEEDOMETER
TEETH
SPLINES
SPLINES
SPLINES
J9221-185
Fig. 79 Mainshaft Bearing And Spline Surfaces
Replace the gear case or housing/adapter if cracked
or broken. Do not attempt to repair this type of dam­
age by welding or brazing.
GEAR
CASE
EXTENSION
HOUSING
(2-WHEEL DRIVE)
ADAPTER
HOUSING
(4-WHEEL
DRIVE)
J9221-186
Fig. 80 Gear Case And Extension/Adapter Housings