MODEL 60 TRAC-LOK
5. Repeat Steps 2. 3. and
·�.
making sure to replace
the cover gasket, if required, in Step 2.
6. It is possible that slight chatter, requiring addi·
tiona! vehicle operation may remain after S
t
P
p 5.
If chatter still persists after one hundred (100)
miles of vehicle operation, or remains scwr�
after Step
5
above, disassemby and repair "ill be
ne
cessar
y.
UNIT INOPERATIVE
Proper performance and capabilities
of
Limited Slip
Differentials are often misunderstood. If in doubt,
read "Operation" above.
No
precise methods of measuring Limited Slip Dif·
ferential performance are generally available in
th
e
field. A
functioning unit can be determined by these
relatively simple vehicle operational tests.
I.
Place one
wheel
on good dry pavement, and the
other on ice, mud, snow, etc.
2.
Gradually open the throttle to obtain maximum
traction prior to "break-a-away". The ability to
move the vehicle effectively will demonstrate
proper performance.
3.
If extremely slick surfaces, such as ice is used,
some question may exist as to proper !M'rform·
ance at Step 2. In these extreme cases. a proper·
ly
performing Umited Slip Differential will pro·
vide greater "pulling power" by lightly applying
the parking brake.
It should be realized that even
with
a properly func·
tioning limited slip differential, it is possible to have a
vehicle hopelessly stuck. This can occur when vehicle
resistance exceeds the maximum possible tractive ef·
fort which can be obtained.
A
differential can do no
more than provide torque to slip both drivi
ng
wheels.
If this torque is not sufficient to move the vehicle. not
even a completely locked differential can do more.
DISASSEMBLY
REMOVAL, INSPECTION AND
REPAIR OF TRAC-LOK
On Dana Spicer axles. it is recommended that
the
complete assembly
be
removed from
the
vehicle when
it becomes necessary to remove the Trac-Lok from t
he
housing.
Remove wheels, brake drums, brake hacking plate
screw-s and axle shafts. Brake hacking plates can nor·
mally be wired to frame
without loosening
the
hydraulic brake line connection at the wheel cylinder
4
if desired. Lse cauuon to avoid damage to brake hne.
Remove axle assembly and place in rack or stand to
serve as a holding device.
Remove cover platr
screws
and cover plate. If cover
gasket is used, discard gasket and replace with nrwone
at time of assembly.
FIGURE #2
101$-2
Remove differential bearing caps.
Note letters
stamped on the bearing caps and the cover face of the
housing. Letters are tO correspond in
horizontal
and
vertical positions. This is very important at time
of
assembly.
FIGURE #3
.......
Mount spreader to housing. Locate a dial indicator
with a magnetic base on cover face
as
shown. Locate
tip of indicator on housing as shown.
Set dial indicator at zero
("0").
Turn forcing screw
of spreader until indicator records .015" (.38 mm).
CAUTION
DO NOT SPREAD
CARRIER
I N
EXCESS OF
.015" (.38 mm).
Remove
I
ndi
ca
t
or
Tools:
D-167 Spreader D-128 Indicator Set
