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Old 02-09-2009, 03:14 PM   #1
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WTF!!!! Second broken driveshaft

Has anyone else had this problem? Installed a SYE kit and HD high angledrive shaft from and have broken 2 double cardens in the past 6 months. The first time was trying to cross a ditch and started to get some wheel hop and "Bang" pieces everywhere. Then today went to run to the store, 2nd gear romped on the throttle and bang coasted to a stop only to find my double carden in 2 pices on the ground. Now this is supposed to be a 3/4 ton double carden. I'm running the 4.0L with a Banks cold air intake, Banks monster exhaust, hypertech programmer, and a throttle body spacer. the drivetrain is stock dana 30/35 3.73 gears and 33" trxus m/t. My jeep is a daily driver so I'm not too hard on it. I have upper adjustable control arms so the pinion angle is perfect. Any Ideas why they keep braking? I have to get it fixed but I dont want to brake another one.
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Old 02-09-2009, 04:40 PM   #2
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Pics would help. What broke? The Flange, the center yoke?

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Old 02-09-2009, 08:30 PM   #3
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Did the universal joint break or the double yoke? If it's the universal an upgrade is simple enough.
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Old 02-09-2009, 08:33 PM   #4
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I stock driveshafts in my garage like people stock washer fluid
* New Jeep *
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2" Skyjacker Body Lift
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Old 02-09-2009, 08:39 PM   #5
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All my budies have Tom Wood driveshafts. They do some really hard wheeling and there never was a problem.
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Old 02-10-2009, 01:01 AM   #6
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Have you been greasing the CV at all?

I've had driveshafts from that place before. They don't really have a good reputation. They are here in Phoenix. About a year ago their main guy Steve left to go to a place called Phoenix Rack and Axle. This is now where we get most of our driveshafts locally. Never once had a problem. I also broke 2 shafts from
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Old 02-10-2009, 02:26 AM   #7
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I have been greasing the u-joints. The double carden, H-yolk, double yolk is what has been breaking. I will post pictures tonight. The U-joints have yet to fail on me though. Kind of think its a material defect. attached is a picture withe thh yolk. it the peice right between the 2 u-joints.
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Old 02-10-2009, 07:40 AM   #8

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The u-joints should be the weak link not the the h-yoke. I would say weak metal or not the correct type of metal or lack of Quality control.

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