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Old 06-24-2015, 10:54 PM   #3
68Timber
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Join Date: Nov 2007
Location: MONTGOMERY, AL
Posts: 5,523
Re: Lifted 85 K5 grinding noise when let off gas

I think you found your problem. Lengthening your drive shaft will help the angle on the upper U-joint. You might need a xfer case drop but not sure, I've read mixed reports about that.
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John

79 2wd Blazer (Bruiser)
85 M1009 Blazer (Sarge) build
74 Honda Z50 build
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