A/T - 4L60 Speed Sensor Leaks Transmission Fluid

91cadillac01

Bulletin No. T-91-4A
File in Group 7
Number 225
Corp. Ref. No. 037105R
Date Feb. 1991


SUBJECT: TRANSMISSION FLUID LEAKS AT SPEED SENSOR - 4L60


MODELS AFFECTED: 1990 BROUGHAMS


This bulletin supersedes Service Bulletin T-91-4 which should be discarded. This bulletin is being revised to delete F-Car part number contained in the original bulletin.


Some 1990 Broughams equipped with the Hydra-Matic 4L6O transmission may experience fluid leaks at the vehicle speed sensor. The leak may occur at the sensor seal to the transmission or at the electrical connector to the sensor. A new series of transmission speed sensors with improved anti-leak characteristics should be used to repair this condition; part numbers are listed below.

Axle Option

Ratio Code P/N

3.08 GU4 10456088
3.73 GT4 10456089

Parts are currently available from GMSPO.

WARRANTY INFORMATION VEHICLE SERIES

Operation
Operation Description Number C D E J K V

Transmission Speed Sensor - Replace K6310 .5