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Re: '71 K20 Growling/Grinding noise
if that truck has alot of miles like one of mine i lean towards baerings in the trans. mine when light makes a loud grinding/ wineing sound load it down with about 5k no sound but when you let of the gas and the drive line slaks up. all new u jionts and a replace driveshaft also and still there seems to be comin with high mile 465 that are well used as mine is in a tow truck with some of the dumist drivers there are
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1986 c20 "the hillbilly" 350 sm465 3.42gears 21mpg at 70mph
1985 k30 "the ice cream truck from hell" no rust az truck
197-8??? c30 "ramp truck" 454
1978 monte carlo 350 350th with 2.73 gears. no rust. sc car
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