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Re: 1988 Silveradio 4x4 problem, and oil in exhaust
I'm just guessing that the problem with the 4wd may be the thermal actuator on the front axle. Is the 4wd system a floor shift or push button? Are you in a cold enviroment? Has the front actuator previously been upgraded to the motor driven actuator? When you put it in 4wd and the front wheels are not pulling, try turning the front driveshaft by hand.
James
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