Pontiac Fiero 1988 Service Manual page 719

7A-2 AUTOMATIC TRANSAXLE
TRANSAXLE I.D
NAMEPLATE
LOCATION
THM 125/125C TRANSAXLE I.D. NAMEPLATE
YPSILANTI, MICHIGAN
TRANSAXLE I . D . " ^ " ^ ' 9 * \ r~'
NAMEPLATE
LOCATION
THM 125/125C TRANSAXLE I.D. NAMEPLATE
WINDSOR, CANADA
I J U L I A N DATE!
11
345
C
8 8
JSC
2 0 2 5
M O D E L Y E A R
(88 = 1988)
[ M O D E L ]
H S E R I A L N U M B E R )
S H I F T B U I L T
A = F I R S T S H I F T
B = SECOND SHIFT
C = THIRD SHIFT
1
J XXXA 8 X X C S
W I N D S O R , I
C A N A D A
r
J U L I A N D A T E
(OR
D A Y O F
T H E Y E A R )
i MODEL
]NO M E A N I N G
MODEL YEAR
(8 = 1988)
H H 0 0 1 0 - 7 A - R 1
Figure 1 Transaxle Identification Information
M-INDICATES TRANSAXLE
TYPE IN OPTION LIST.'(SPECIFIC
MODEL CODE IS FOUND ON THE
TRANSAXLE NAMEPLATE}
MX-DESIGNATES
AUTOMATIC TRANSAXLES
SERVICE PARTS IDENTIFICATION
1 G 3 A R 4 7 Y X E 5 1 0
C90 C95 DF3 D3C D33 D 8 E
0 0 0 1
Z E
DO l i r
REMOVE
D FFL F40 G61 GW9 060 GU2 G89
JA1 JA4 K05 K22 K99 LV2|MD9|MX0JNA5 NB1 NK1 NK2 N33 N67 GJW
T87 UJ3 U23 U35 V08 V10 WC3 WG2 YT9 Y56 OIL
BSC 421
421 420
42T 409 7SB 8WT 9WT 11A 90A
PRINTED IN U.S.A.
PART NO. 14065987
HH0100-7A
Figure 2 S e r v i c e Parts Identification Label
when
throttle apply of the accelerator or,
manually downshifting to a lower range.
Also defined as "LATE" or, "EXTENDED/'
• D o u b l e B u m p ( " D o u b l e F e e l " )
- two sudden
and forceful applies of a clutch or band.
• E a r l y
- a condition where the shift occurs before
the vehicle has reached a proper speed and tends
to labor the engine after the upshift.
• E n d B u m p
- a firmer feel at the end of a shift as
compared to the feel at the start of the shift. Also
defined as "END FEEL" or, "SLIP BUMP."
F i r m
- a noticeable quick apply of a clutch or
band that is considered
n o r m a l
with a medium
to heavy throttle shift. Should not be confused
with "HARSH" or "ROUGH."
F l a r e
- a quick increase in engine rpm
accompanied with a momentary loss of torque.
This most generally occurs during a shift. Also
defined as "SLIPPING."
H a r s h ( " R o u g h " )
- a more noticeable apply of
a clutch or band as compared to "FIRM." This
condition is considered undesireable at any
throttle position.
H u n t i n g
- a repeating quick series of upshifts
and downshifts that causes a noticeable change in
engine rpm. An example could be described as a
4-3-4 shift pattern. Also defined as
"BUSYNESS."
I n i t i a l F e e l
- a distinct firmer feel at that start
of a shift as compared to the finish of the shift.
Late
- a shift that occurs when the engine is at
a higher than normal rpm for a given amount of
throttle.
S h u d d e r
- a repeating jerking sensation similar
to "CHUGGLE" but more severe and rapid in
nature. This condition may be most noticeable
during certain ranges of vehicle speed. May also
be used to define the condition after converter
clutch engagement.
S l i p p i n g
- a noticeable increase in engine rpm
without a vehicle speed increase. A slip usually
occurs during or after initial clutch or band
engagement.