88 Truck, no Over Drive

Joined
Jun 18, 2005
Messages
184
Location
Summerville, SC.
Looking for some help, my auto will not engage into O/D. It was fine the day before and the manuel isn't telling me anything. I can't see how the gears would all of the sudden be bad so I'm thinking it's in the electrical system. it's a 88 3.0 with auto trans. Any help would be great. Thanks.
 
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