Pre 84 Trucks 1st gen pickups

Bad rattle when letting off throttle at 55mph

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Old 05-06-2009, 10:19 AM
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Bad rattle when letting off throttle at 55mph

Hey guys fixing one problem at a time, after getting it running, and drivable finnaly got it on the road for a good trip, and as soon as u get to about 45-55 mph, and let off the throttle it seems like the whole truck just shakes, i ballanced the tires just cuz it was something that was easy and fast to try one of the older guys in my shop said to try u-joints does that sound about right or any suggestions

thanks
tony
Old 05-06-2009, 11:00 AM
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check u joints, make sure your drive shaft bolts are tight, and wheel bearings, and complete tune up of the entire truck mine did the same till I went over the whole truck now its great
Old 05-06-2009, 05:22 PM
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U joints, and possibly a bent drive shaft. It's rare that one will not "shake" on acceleration but it is not impossible.

Lock it into 4wd and turn sharp circles, in all directions forwards and backwards. Does it still make the sounds?
Old 05-08-2009, 05:14 PM
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allright guys figured it out, while i was taking the driveshaft out noticed alot of play in the tailshaft flange, disconnected the driveshaft and the nut holding it on was very loose, torqued it down and bent the edge of the nut where the groove is on the transfer case and no no more vibration,
thanks guys
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