u joint or tranny

1994 CHEVROLET ASTRO
171,000 MILES • 2WD • AUTOMATIC
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SDAVI046
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my 94 chevy astro van starts out in drive kinda shakes and clanks around when starting out in 1st gear could this be a u-joint on drive shaft going bad?
Apr 18, 2011 at 11:08 PM
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CARADIODOC
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Absolutely. Shift out of park with the wheels blocked or the parking brake set if it works, then crawl underneath and try turning the drive shaft and moving it up and down. Also look for reddish brown rust and powder around the bearing cups.
Apr 18, 2011 at 11:14 PM