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Old 03-04-2019, 12:57 AM   #2
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Join Date: Nov 2016
Location: OR
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I would bet that your countershaft drive gear sheared off or something to that effect. In 4th gear the power goes straight through the transmission and the countershaft just sort of freewheels. If 4th is the only gear that works then something is up with the countershaft. I think any transmission out of a 4cyl 4X4 will bolt up.
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