scoobiedubie Posted March 16, 2014 Share Posted March 16, 2014 In a 5 speed 86 GL10 stick transmission, what are the different reasons that you can lose 4WD without having any sort of abnormal noise from the transmission or rear differential? Link to comment Share on other sites More sharing options...
Gloyale Posted March 16, 2014 Share Posted March 16, 2014 Vacuum hose disconnected from the 4wd solenoids. 1 Link to comment Share on other sites More sharing options...
scoobiedubie Posted March 24, 2014 Author Share Posted March 24, 2014 It turned out to be the vacuum switch at the other end of the vacuum hose. Also, the Loyales, the GL's and the GL10's use the same switch. Most people won't have to sweat this one because it takes over 400,000 miles before this problem arises. Link to comment Share on other sites More sharing options...
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