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WEIRD OVERDRIVE PROBLEM 700 88

THIS IS MY 3RD 740 TURBO WAGON AND I ACTUALY WENT THROUGH SIMILAR PROBLEM COUPLE TIMES BEFORE.MY PREVIOUS CARS HAD OVERDRIVE PROBLEM THAT I FIXED SIMPLY BY REPLACING THE O.D. RELAY,BUT THIS ONE IS TRICKY -AT LEAST TO ME.THE CAR RUNS GOOD AND SHIFTS PRETTY SMOOTHLY FOR FIRST 5-10 MIN,THEN IT STARTS DOWNSHIFTING AT ABOUT 70MPH,AND IN NEXT COUPLE OF MINUTES IT STARTS DOWNSHIFTING AT 60-65 MPH.SO EVERY TIME I GET ON THE FREEWAY AFTER 15 MIN I END UP DRIVING THE CAR ON HIGH RPMS.AT ONE POINT IT LOCKS IN OVERDRIVE AND I'M STUCK WITH 4000 RPMS ON 70 MPH RIDE.OVERDRIVE RELAY WORKS AND I'VE REPLACED IT WITH THE NEW ONE.SWITCH BUTTON WORKS AS WELL.I TRIED ADJUSTING DOWN KICK CABLE(EVEN RETARDED IT ALL THE WAY)-NO HELP.

ANYONE SHARED SIMILAR EXPERIENCE?

LOVE THE CAR AND DETERMINED TO FIX IT

THANKS

LEO






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