Question about 1989 Isuzu Trooper
I have a 1989 Isuzu trooper and it had the same problem. Change your thermostat. It is a $10 fix. The overdrive wont engage until a sensor heats up. When the thermostat goes, the sensor does not get warm enough.
Posted on Mar 23, 2009
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Posted on Jan 02, 2017
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