TRANSMISSION FLUID LEAKS AT THE VEHICLE SPEED SENSOR

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 4L.60 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 Operation VEHICLE SERIES --------------------------------- Number ----------------------------- ----- Operation Description K6310 C D E J K V ---------------------- -- -- -- -- -- -- Transmission Speed Sensor - Replace .5

General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.