Dodge RAM TRUCK 1500 1995 Service Manual page 1287

21 - 4 NV3500 MANUAL TRANSMISSION
B R
Wile
Ratio
Version
first = 4.016:1
second = 2.318:1
third =
1.401:1
fourth = 1 : 1
fifth = 0.729:1
reverse = 3.55:1
Close Ratio Version
first = 3.49:1
second = 2.16:1
third =
1.401:1
fourth = 1:1
fifth = 0.729:1
reverse = 3.55:1
TRANSMISSION CHANGES
The shift lever assembly and shift mechanism are
new for 1995. The new design self-biasing shift lever
is mounted in a lightweight shift tower. The lever
and tower are serviced as an assembly.
The shift socket and shift shaft are basically un­
changed. However, the bias spring, anti-rotation
bracket, and bracket rollers are no longer necessary
and have been eliminated. This is made possible by
the new self-biasing shift lever assembly.
A new remover tool for the shift socket roll pin, has
been developed. The tool is available through the
dealer tool program as Remover Tool 6858. Tool use
is described in the overhaul section.
TRANSMISSION DIAGNOSIS
LOW LUBRICANT LEVEL
A low transmission lubricant level is generally the
result of a leak, inadequate lubricant fill, or an incor­
rect lubricant level check.
Leaks can occur at the mating surfaces of the hous­
ings, or from the front/rear seals. A suspected leak
could also be the result of an overfill condition.
Leaks at component mating surfaces will probably
be the result of inadequate sealer, gaps in the sealer,
incorrect bolt tightening, or use of a non-recom­
mended sealer.
A leak at the front of the transmission will be from
either a loose or damaged, front bearing retainer or
retainer seal. Lubricant may also drip from the
transmission clutch housing after extended opera­
tion. If the leak is severe, it will contaminate the
clutch disc causing slip, grab and chatter.
Transmissions filled from air or electrically pow­
ered lubricant containers can be underfilled. This
generally happens when the container delivery mech­
anism is improperly calibrated. Always check the lu­
bricant level after filling to avoid an under fill
condition.
A correct lubricant level check can only be
made when the vehicle is level; use a drive-on
hoist to ensure this. Also allow the lubricant to
settle for a minute or so before checking. These
recommendations will ensure an accurate
check and avoid an under-or-overfill condition.
HARD SHIFTING
Hard shifting is usually caused by a low lubricant
level, improper or contaminated lubricants, transmis­
sion component damage, clutch linkage malfunction,
or by a damaged clutch pressure plate or disc.
Substantial lubricant leaks can result in gear, shift
component, synchro and bearing damage. If a leak
goes undetected for an extended period, the first in­
dications of a problem are usually hard shifting and
noise.
Incorrect or contaminated lubricants can also con­
tribute to hard shifting. The consequence of using
non-recommended lubricants is noise, excessive wear,
internal bind and hard shifting.
Improper clutch release is a frequent cause of hard
shifting. Incorrect adjustment or a worn, damaged
pressure plate or disc can cause incorrect release. If
the clutch problem is advanced, gear clash during
shifts can result.
Worn or damaged synchro rings can cause gear
clash when shifting into any forward gear. In some
new or rebuilt transmissions, new synchro rings may
tend to stick slightly causing stiff and/or noisy shifts.
In most cases, this condition will decline as the rings
wear-in.
TRANSMISSION. NOISE .
A
Most manual transmissions make some noise dur­
ing normal operation. Rotating gears can generate a
mild whine that may only be audible at extreme
speeds.
Severe, obviously audible transmission noise is
generally the result of a lubricant problem. Insuffi­
cient, improper, or contaminated lubricant can pro­
mote rapid wear of gears, synchros, shift rails, forks
and bearings. The overheating caused by a lubricant
problem, can also lead to gear breakage.
TRANSMISSION REMOVAL (2-WHEEL DRIVE)
(1) Disconnect battery negative cable.
(2) Shift transmission into Neutral.
(3) Remove shift boot bezel screws and slide boot
upward on shift lever extension.
(4) Remove bolts attaching shift tower and lever
assembly to rear case. Then remove shift tower and
shift lever extension as assembly (Fig. 4).
(5) If isolator and plate came off during shift tower
removal (Fig. 4), remove assembly from shift hous­
ing. Note that plate is one-way fit. Narrow side of
plate goes toward driver side of transmission.
(6) Raise vehicle on hoist.
(7) Remove crankshaft position sensor. Retain sen­
sor attaching bolts.