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Old 01-26-2003, 08:55 AM   #1
vmax
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Join Date: Sep 2002
Location: michigan
Posts: 25
Unhappy roaring 4+4

hello,
have a `86 gmc 305 4+4 with a 700r4 tranny. my question is that when i get my truck up to 55 mph when it is in 4+4 there is a loud roaring sound and a vibration not a bad vibration but it is noticable.it has never done this before.it feels like something is out of balance with a roaring sound.any input will be great,thanks in advance,vmax
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