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Old 08-18-2011, 09:36 PM   #3
68Timber
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Join Date: Nov 2007
Location: MONTGOMERY, AL
Posts: 5,523
Re: Any idea what could cause this???? 86 k5 vibrating

How much 90w did you have to add when you realized it was low? The oil bath cools it, I'd suspect the rear end before the transmission.
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79 2wd Blazer (Bruiser)
85 M1009 Blazer (Sarge) build
74 Honda Z50 build
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