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Overdrive on 1990 740 Turbo goes off and on without warning. 700

posted by  rstarkie on  Tue May 13 08:23 CST 2003
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last visit: Fri Oct 24 10:14 CST 2014
[RELATED]

Most often the relay is responsible for the symptoms you describe. The relay tray is behind the ashtray and once you remove it and the small storage compartment you have good access to the relays. I believe you will find the overdrive relay on the right hand side of the second row. About 1" square base and about 2" tall. If you remove it and pry the cover off you would be able to resolder the circuit board and probably fix your problem. If you disable the overdrive by simply removing the relay it will never shift into fourth gear (overdrive) and fuel economy will suffer because the engine will operate at a higher RPM.

Randy






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