Axle Usage Chart - Pontiac TRANS AM 1977 Service Manual

DIFFERENTIAL
4B-23
B=BUICK C=CHEVROLET-BUFFALO GEAR
G=CHEVRO LET-DETROIT GEAR & AXLE
K=G.M. OF CANADA O=OLDSMOBILE PPONTIAC
SERIES
A & G SEDAN
A WAGON
B SEDAN
B WAGON
F SEDAN
H SERIES
X SEDAN
FIRST TWO
A L L B AND 0 BUILT AXLES WlTH 8 112" RlNG GEARS ARE UNIT BEARING (NON 'C' LOCK) AXLES.
A L L OTHERS ARE DIRECT-ON BEARING ('C' LOCK) AXLES.
8 112" RlNG GEAR AXLES ARE AVAILABLE WlTH LM1 ENGINES (CHEV. 350) ONLY.
CARRIER), IDENTIFYING GEAR RATIO AND DIFFERENTIAL TYPE.
THIRD LETTER OF AXLE CODE IDENTIFYING AXLE MANUFACTURER:
GEAR
2.41
2.56
2.73
3.08
3.23
2.56
2.73
3.23
2.41
2.41
2.56
2.73
3.08
3.23
2.56
2.73
3.08
3.23
2.41
2.56
3.08
3.23
2.92
2.56
2.73
2.93
3.42
2.41
2.56
3.08
3.23
3.42
LETTERS
Fig. 48-45 Axle Usage Chart
RING GEAR
-vs-
PINION TEETH
41:17
41:16
41:15
40:13
41:13
41:16
41:15
41:13
41:17
41:17
41:16
41:15
40:13
41:13
41:16
41:15
40: 13
41:13
41:17
41:16
40:13
41:13
38:13
41 :16
41:15
41:14
41:12
41:17
-
41:16
-
40: 13
41:13
41:12
OF AXLE CODE,
RING
GEAR
SIZE
8 112"
8 314"
7 112"
8112"
8 314"
8 112"
6 112"
7 112"
7 112"
-
8112"~
7 112"
STAMPED
MANU-2
FACTURER
B . ~
03
OR
C
P
POR K
Bn3
G
OR
K
P
G
C
K
0
C
0
38r
(ADJACENT T C
AXLE CODES
.
DIFFERENTIAL
STANDARD
AA
A L
AB
AJ
AX
AS
AU
AK
AR
AT
ZD
Z E
ZK
GH
LA
KJ
MN
KK
,
LX
MP
LT
MQ
YD
YE
YJ
YK
PJ
PH
PC
PD
HK
DY
DR
DX
DU
FH
FB
-
T A
TC
FK
FG
FE
FL
ON RIGHT-HAND
TYPE'
LOCKING
C A
C L
CB
CJ
CX
-
CU
-
CR
CT
ZU
ZW
ZZ
-
NR
KS
MZ
KR
NX
MY
NT
MX
YU
YW
'
YY
YZ
PS
PT
PW
PX
HM
E Y
D E
EX
E U
FS
FY
TZ
TX
FQ
FT
FV
FR
AXLE TUBE