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  1. Okie556

    4-Wheel Drive Question

    Hey all! New to forum and was hoping for some help. I have a 2006 Z71 Silverado and about 3 years ago I had a local 4WD shop change front and rear gears. Came stock with 3:43 and went to 4:10 for pulling 7500# travel trailer. All as been well...never use the 4WD...until couple of weeks ago...
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