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Tranny Overdire 700 1990

The overdrive on my 1990 740 wagon (automatic) kicks in spontaneously, usually in city driving at around 30mph. Pressing the od switch on the shifter has no effect on releasing it, although it will go back to normal by itself after a few minutes. The shifter switch is reliable when I intentionally engage the overdrive. What should I check first?








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Tranny Overdire 700 1990

Overdrive relay. It develops cracks in the solder that intermittently conduct. The light on the dash should reflect the overdrive status if it is the culprit.
--
Paul NW Indiana '89 740 Turbo 103,000








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Tranny Overdire 700 1990

Thanks for the tip







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