K 1500 Truck 4WD V6-4.3L VIN W (1997)
Fluid Pan: Customer Interest
A/T - Diagnosis Of Noise & Delayed Engagement
File in Section: 7 - Transmission
Bulletin No.: 77-71-67
Date: August, 1997
INFORMATION
Subject:
Diagnosis of Transmission Noise, Delayed Engagement, Delayed/Busy Shifts and No Drive or Reverse
Models:
1997 Chevrolet and GMC C/K, G, P Models
with HYDRA-MATIC 4L80E Transmission (RPO MT1)
Field reports have indicated that a dented oil pan can cause any of the following customer concerns:
-
Whine noise in 1st and/or 2nd gear that appears to be a gear whine,
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Whine noise in all gears that appears to be an oil pump or torque converter whine,
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Grind or growl noise in 1st gear,
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Delayed engagement from Park to Reverse or Drive,
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Delayed or no shifts to any gear,
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No forward or reverse gears,
-
Busy shifts in and out of 4th gear and/or TCC,
-
Slipping and/or transmission overheating.
