car will not go into over drive

Asked by Nov 24, 2016 at 09:00 PM about the 1997 Audi A6 4 Dr 2.8 quattro AWD Sedan

Question type: Maintenance & Repair

I performed a trans service. Heated the atf  to 86 degrees f and topped off. Car shifted through all the gears but when I got into traffic and slowed down  and started moving again ,the car would not go into overdrive and the engine light came on with the code for improper gear ratio for gear 3 and 4. i shut  the car off and back on and the car shifted through all the gears again perfectly. This is how I know must drive the car.  How can I stop this from happening.

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