CODE E39 VISCOUS CONVERTER CLUTCH DIAGNOSIS (INFO.)

SUBJECT: CODE E39, VISCOUS CONVERTER CLUTCH DIAGNOSIS (INFORMATION).

VEHICLES AFFECTED: 1990-91 "C", "E", "K" MODELS

This bulletin is being revised to correct paragraph 4

Some 1990-91 Devilles, Fleetwoods, Eldorados, and Sevilles may experience a condition of a code E39 (EO39).

When servicing 1 990 DeVilles, Fleetwoods, Eldorados, and Sevilles with a code E39, refer to GMCL 88-7740-112 and Cadillac T-89-32 (Corporate bulletin number 817103).

When servicing 1991 DeVilles, Fleetwoods, Eldorados, and Sevilles with a code E39, follow the attached trouble trees.

Code E39 will set when the ECM commands VCC apply in fourth gear but determines that engine rpm is too high for the given vehicle speed. Possible causes for this condition include:

0 slipping converter clutch in torque converter

0 leak in VCC apply passages

0 stuck/binding VCC apply valve

0 faulty VCC solenoid

0 Faulty wiring or ECM

0 incorrect PROM in car

0 incorrect transmission assembly in car

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.