Cadillac Repair: 95 cadillac with northstar, torque converter clutch, test procedures

Question
QUESTION: The check engine light came on on the way home but when I stopped and restarted the car it went off. The next time I drove the car the light was off and then it was intermitten and finally stayed on. Now the transmission after it warms up kickes out of overdrive into a lower gear.Help please

ANSWER: You need to retrieve the codes from the computer and let me know what they are. If you browse thru my past answered questions you will find the procedure to get the codes.

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QUESTION: The codes that came out were 39--94--117 all were in the system. At low speeds the light does go off but after a few miles of 45-55 mph the light comes on and shortly thereafter it will downshift. It I slow down to go around a corner it has been ok. On The interstate it downshifts and will not correct itself even in stopping and starting the vehicle again.

Answer
39 is a torque converter clutch fault in the trans.

94 is a solenoid Shift "A" problem.

117 is a Shift "A" & "B" problem.

If you are mechanicaly inclined or know of someone who is, You will need simple electrical schematics, Test procedures and picture locations of the components within the system that is causing you problems of which can't be done on this website which only allows one picture. I do not have a website so you will have to e-mail: onlineautohelp@msn.com in order to obtain the information.