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3-24
SURE-GRIP DIFFERENTIAL
SURE-GRIP DIFFERENTIAL
Description
The sure-grip differential (Figs. 61,
62, 63
and
64)
is similar to the conventional differential except for
the addition of friction plates and Belleville plates
and discs for clutching the differential case to the
differential gears and a means for engaging these
plates. It has four pinion gears, positioned in the case
by two pinion shafts which are at right angles
to
each
other and loose fitting at their intersection. Both ends
of each shaft have two flat surfaces, or ramps, which
mate with identical ramps in the differential case.
There is additional clearance in the case to permit
slight sideplay of the ends of the pinion shafts within
the case.
ldenfif icufion
Identification
of
Sure-Grip type differential assem-
bly
can be made
by
lifting
t h e rear wheels off t h e
ground and
turning
them.
If
they
both
turn in
t h e
same direction, t h e vehicle i s equipped
with
a Sure
Grip
Differential o r t h e letter
"S"
stamped o n t h e
identification pad o n t h e
right
side o f carrier hous-
ing,
o r
by
a metal tag reading. "Use Sure-Grip
Lube"
attached
by
means
of
t h e rear axle housing-to
carrier
bolt, below
t h e carrier filler
plug.
If
t h e
letter
"S"
o r tag is not apparent, remove filler
plug
and use a flashlight t o
look up
through t h e filler
plug
hole t o identify the type
of
differential case.
The
s u r e - g r i p t y p e differential case (two-piece construc-
tion)
has attaching bolts. T h e conventional t y p e
differential case (one-piece construction) has
a
dome-
like
shape
with
n o case cap attaching bolts.
Whenever the rear axle shafts have been removed
from the "Sure-Grip" axle assembly always deter-
mine that the thrust spacers have not fallen
out
of
the pinion shaft (Fig. 62). The spacers may be
ob-
P r I O N SHAFT
DIFFERENTIAL PINION
/
DIFFERENTIAL CASE
w
SHAFT
KR260
Fig. 62-Sure
Grip Differential
ISchemotfd
Fig. 61-Sure
Grip
Differential
fCrosr
Section View)
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