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4 A-6
1968 P O N T I A C SERVICE MANUAL
REAR
AXLE
MODEL
TRANSMISSION
RATIO
RELEASE
ENGINE
AIR
COND.
STD.
DIFF.
LOCK
DIFF.
GEAR
CODE*
CODE*
CODE*
_c
X
X
X
X
X
41:16 2.56
X
X
X
X
X
X
XB
ZB
X
X
X
X
39:14 2.78
X
X
X
X
X
X
X
X
X
X
X
X
X
XC
ZC
X
X
X
X
X
41:14 2.93
X
X
X
X
X
X
XD
ZD
X
X
X
X
X
X
40:13 3.08
X
X
' X
X
X
X
X
X
X
X
X
X
X
XE
ZE
X
X
X X
X
X
X
X
X
X
X
42:13 3.23
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
XF
ZF
X
X
X
X
X
X
X
37:11 3.36
X
X
X
X
X
X
X
X
X
X
X
X
X
X
XG
ZM
X
X
X
X
X
X
X
X
X
X
39:11 3.55
X
X
X
X
X
X
X
X
X
X
X
X
XH
ZN
X
X
X
X
SPECIAL
ORDER
X
X$
X
X
X
X
X
X X
39:10 3.90
X
X
X
X
x$#
ZP
X
X
SPECIAL
ORDER
X
X
x#
39:9
4.33
X
X
X
X
x#
ZR
$ - Special Radiator Required
# - Special Engine Fan Required
#
- Located on L.H. Axle Tube and L.H. Brake Drum
F i g . 4 A - 4 C
Firebird - Rear A x l e Usage and Identification
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