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Chevy S10 - GMC S15 and Sonoma Accident Damage Questions

12 messages,  Last post on Nov 13, 2007 at 12:15 AM

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#11 of 12 Re: Hit from behind, could driveshaft be damaged? [darkpunk33] by masterguns Jun 23, 2007 (8:49 am)
Replying to: darkpunk33 (Jun 21, 2007 9:18 pm) I don't recall any noise when backing up. Of course it was a while back and never spend much time in reverse. My advice is get it checked out by two or three places. If they say you need a new drive shaft cuz your U-joints are bad and you don't have the money for it, find somebody to just tighten the joints for you.
#12 of 12 Re: Hit, driveshaft damaged? [gonogo] by philscbx Nov 13, 2007 (12:15 am)
Replying to: gonogo (Apr 14, 2007 8:16 am) gonogo is right. This is how we did for 30 years.   Getting hit, the shaft will take up the slack at the tranny, but only if so much movement occurred to move the axle.   So this isn't making much sense unless the frame buckled between the axle and tranny to shorten the distance for the drive shaft to bottom out at the tranny and over load the U-Joint at the axle.   The only other possibility is the impact and over load with the tires forced the drive shaft to rotate rearranged the rust in the U-Joint bearing cups.   You would have to remove U-Joint bearing caps to inspect for the real problem. 1], U-Joints just don't come loose. They have 2 very strong U-Bolts holding them to the yoke of the rear end. 2] Quick inspection with veh on lift will show if there is any movement. This movement if any will normally be at the bearing cups from worn out needle bearings.   60,000 miles on original U-Joints and never serviced prior is probably about right for replacement with a joint and service grease fitting.   Now for vibration of drive shaft, it's not impossible it was bent when loaded onto truck for transport. So check for towing damage. I know in this case it was not towed. Just reporting what happens.   I've seen U-Joints installed wrong as well. If they are not seated in yoke correctly and tightened and your accident corrected the seated joint to yoke fit, then yes, Joint U Bolts would be loose. Otherwise I'd say B/S they were loose at bolts from being hit from behind.

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