Fiero L4-151 2.5L (1985)
Shifter M/T: All Technical Service Bulletins
M/T - Shift Lever Rattle/Buzz Noise in 3rd or 4th Gear
Bulletin Number:
89-7-19
Reference Number:
937201
Publish Date:
2/89
Subject:
SHIFT LEVER RATTLE/BUZZ NOISE IN 3RD OR 4TH GEARS ISUZU 5SPD M/T (NEW PARTS)
Models Affected:
1985 - 1989 SUNBIRD, GRAND AM AND FIERO MODELS
This bulletin supersedes bulletin 86-7-27A dated 8/86 which should now be discarded.
Engine VIN "0" pertains to 1.8L; Engine VINs "U" and "R" pertain to 2.5L; and the other VIN numbers pertain to 2.0L engines.
Some 1985-89 Sunbirds, Grand Ams and Fiero models equipped with Isuzu 5-Speed manual transaxles may exhibit a rattle or buzzing type noise
through the shifter handle while driving in 3rd or 4th gears. This noise condition is normally caused by a run-out condition between the 3-4 synchronizer
and the 3rd or 4th input gears.
This condition has been corrected during the 1989 model year. Therefore any 1989 vehicle equipped with an Isuzu unit built on or after serial number
IX17J01 should not have this condition. The serial number is printed on the transmission bar code label, which is located on the clutch housing. The
serial number should be read as follows:
Positions 1.........Corp. Name
(i.e. I = Isuzu)
2.........Month of build 1-9, X, Y, or Z
(i.
e. 2 = Feb., 7 = July, X = Oct., Z = Dec.) 3, 4......Day of month built 1-31
(i.
e. 17 = 17th day of the month) 5.........Year of build (i.e. J-Z = 1988, A-I = 1989)
Examples:
Unit IX17J01 = built on Oct. 17, 1988. Unit I130B35 = built on Jan. 30, 1989.
To repair this condition install a new 3rd/4th synchronizer assembly, 3rd/4th fork assembly, and a 3rd or 4th input gear. Refer to the following chart
when ordering parts from GMSPO.
DESCRIPTION
DIVISION
BODY
ENGINE
MODEL
PART
VIN
YEAR
NUMBER
Fork - 3rd/4th
All
All
All
All
94464752
Synchronizer Asm.
All
All
All
All
94249573
-
3rd/4th
3rd Input Gear
Pontiac
J
K,O
85-89
94149668
Pontiac
N
U
85-89
94149668
Pontiac
P
R
85-89
94149668
4th Input Gear
Pontiac
J
K,O
85-89
94139575
Pontiac
N
U
85-89
94139575
Pontiac
P
R
85-89
94139575
Parts are currently available from GMSPO.
Use applicable Labor Operation Number and Time.
