A/T - 4L60 Fluid Leaks At Speed Sensor/Manual Update
90pontiac15Bulletin Number: 91-7-2
Reference Number: 037105R
Publish Date: 7/90
Subject: TRANSMISSION FLUID LEAKS AT SPEED SENSOR (NEW SPEED SENSORS)
Models
Affected: 1990-91 FIREBIRD WITH 4L60 TRANSMISSION
CONDITION: Transmission fluid leaks at the vehicle speed sensor.
CAUSE: The leak may be at the sensor seal to the transmission or at the electrical connector to the sensor.
CORRECTION: A new series of transmission speed sensors with improved anti-leak characteristics should be used to correct the condition.
Use P/N 10456087 Replaces P/N 10456020
P/N 10456088 Replaces P/N 10456021
P/N 10456089 Replaces P/N 10456022
See Parts Book for proper application.
Parts are currently available from GMSPO.
Use Labor Code: K6310
Labor Time: 0.5 hrs.
The attached art work/repair information supplements the unit repair for speed sensor/speedometer driven gear given in section 7 of the service manual.