Grand AM L4-138 2.3L VIN A FI HP (1989)
Gear: Customer Interest
M/T - Knocking or Tapping Noise In All Gear Ranges
Bulletin Number:
89-7-39A
Reference Number:
977204R
Publish Date:
2/90
Subject:
KNOCKING OR TAPPING NOISE IN ALL GEAR RANGES AND NEUTRAL WITH CLUTCH PEDAL OUT
Models
Affected:
1989 HM-282/5TM40 6000, SUNBIRD, GRAND AM AND GRAND PRIX MODELS
This bulletin cancels and replaces bulletin 89-7-39 issued 7/89. This bulletin has been revised to add additional information under "Bulletin Covers",
"Date Of Production Change" (Chart Added), and "Service Procedure" (1st paragraph).
BULLETIN COVERS:
Some HM-282/HYDRA-MATIC 5TM40 Transaxles built between approximately November 1, 1988, and April 7, 1989, may exhibit a knocking or
tapping noise in all gears and neutral with the clutch pedal out. This condition is termed Gear Noise.
PROPER DIAGNOSIS IS IMPORTANT: Do not confuse this Gear Noise with Clutch Rattle or Neutral Gear Rattle. A knocking or tapping noise
which is only heard in neutral with the clutch pedal out is clutch rattle or neutral gear rattle. Reference
Pontiac Service Bulletin 88-7-40 issued 10/88.
DATE OF PRODUCTION CHANGE:
A vehicle equipped with a HM-282/HYDRA-MATIC 5TM40 built between approximately November 1, 1988, and April 7, 1989, may exhibit the gear
noise condition described above. Refer to the chart below for specific model breakpoint information:
Figure 1
Model
Beginning Serial No.*
Ending Serial No.*
9XAX
10
4471
9XBX
10
9920
9XCX
6
1047
9XFX
5611
8830
9XMX
879
5002
9XNX
4344
22157
9XSX
3767
8380
9XXX
1139
4457