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Mazda RX-7 - Notes on Machining and Assembly

Mazda RX-7
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CHASSIS/DRIVELINE
The 1st-2nd
and 3rd-4th shifting
forks are
heavier
and
heat treated
for
strength and improved
shift-
ing
action. The
5th-reverse
fork is
heat treated
only.
9. Shift
lever
assembly,4352
17
510
This
is a one- instead of
a two-
piece
lever,
with a larger
diameter
than
the standard version.
C. Drlveshaft.
1. Driveshaft assembly,4352
25 100
This is
a special two-piece
drive-
shaft with a center
universal
joint
and support
bearing. lt has
been
designed
to move the resonant
frequency
out of the working
range
of driveshaft
speed. lts
specifica-
tions
and configuration
are shown
in
the illustration.
This higher
capacity bearing
will
accept the increased
drive
and
torque loads
of competition,
but
must
be
used
with
the differential
carrier assembly mentioned
above.
E. Rear axle.
1.
Axle housing
assembly,
435226020
This axle housing has
been de-
signed to work with the factory
rear
disc brakes,
and
has
a
baffle
plate
to retain
oil around the
gears
when cornering.
2.
Axle
shaf t
assembly, 4352 26 110
This axle
shaft is designed to
be
used with
the
rear
disc
brake ar-
rangement,
and
it includes
a
larg-
er capacity
bearing. lt is fully
compatible with
the competition
limited
slip unit, but
if
used
with
the limited
slip which is
available
to fit the
stock
version
of
the
axle
housing,
the axle must
be
cut
off
by
5
mm
on the
splined end to
avoid
interference.
Notes
on Machining
and
Assem.
blv.
A. Clutch.
1. A stop
block to
limit
clutch
pedal
travel must
be fabricated
and
in-
stalled on the floorboard
as shown
in
the illustration.
Without
the
stop block, excessive
clutch
pedal
travel
will
push
the clutch
dia-
phragm
spring over center, result-
ing in
the clutch hanging
up and
not re-engaging
with high
speed
gear
changes. Additionally,
this
excessive
pedal
travel will cause
distortion of
the diaphragm spring.
D. Dlfferential.
1. Differential
gears
are available in
the following ratios:
Limited slip differential,
0820 79 9608
The limited
slip is
a
friction
clutch
type
for simplicity
and ef f iciency.
Dif ferential carrier
assembly,
435227 150
This
carrier assembly is
designed
exclusively to
work with the in-
creased
load capacity
bearing
also available
as a competition
part.
Rear
bearing,0540 27 141
I
I
3,
[8re
U
n
ro
(o
ll
f'
t
395
573
Note: All
dimensions
are
in mm.
Ratio Teeth
(ring/pinion)
Part Number
4.111 37t9 1 01
3-27-1 10
4.375
35/8 0839-79-950
4.444 40t9 1
393-27-1 10A
4.625 37t8
0881-79.720
4.875 39/8 1312-27-1104

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