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Old 01-02-2009, 00:12   #1 (permalink)
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Default CV eating CUCV

My M1009 is going through cv's in my rear drive shaft rediculously fast. I replaced both the upper and lower(rear) cv last week, installed by my mechanic, and now I've blown the top one with virtually no warning.

Before I replace them with a high-end part, is this something that any of you have experienced with these trucks? Possible cause/solution? Any input is appreciated!
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Old 01-02-2009, 00:17   #2 (permalink)
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Mabey your driveshaft is out of balance or bent. Do you feel a vibration?
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Old 01-02-2009, 00:41   #3 (permalink)
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rotate your drive shaft 180 degrees on the pinion, if that dont work take it to a driveline shop to have it balanced and checked over, if that still doesnt help try lowering your transfer case an inch. after blowing 2 of the heavy duty u-joints on the upper end of my drive shaft in 6 months i found after lowering my transfer case theres no vibration and hopefully my joints stay intact for a but longer then 6 months
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looking at aquriing a BTR-60PB any tips or pointers etc would be appreciated
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Old 01-02-2009, 20:21   #4 (permalink)
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Quote:
Originally Posted by maritimer View Post
rotate your drive shaft 180 degrees on the pinion, if that dont work take it to a driveline shop to have it balanced and checked over, if that still doesnt help try lowering your transfer case an inch. after blowing 2 of the heavy duty u-joints on the upper end of my drive shaft in 6 months i found after lowering my transfer case theres no vibration and hopefully my joints stay intact for a but longer then 6 months
Thanks for the replies. I found that the problem was a worn slip-yoke. One hole was some-what oblong from wear causing the u-joint to come free under load. I'm getting the drive shaft balanced as well.
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Old 01-11-2009, 23:23   #5 (permalink)
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Just to add to this, I bought a new slip yoke and had it installed. During the installation, we discovered the driveshaft was an inch 'n a half too short. So, lengthened the shaft, new universals, new yoke no vibration!!

Hope it lasts lol!
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Old 01-11-2009, 23:30   #6 (permalink)
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Quote:
Originally Posted by OLDCHEV4X4 View Post
Mabey your driveshaft is out of balance or bent. Do you feel a vibration?

Thats is about the only thing that will take out a u joint that quick.. or your mech is a rod
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