Rear driveshaft fail on 3.5 RK midarm lifted JKU - JKowners.com : Jeep Wrangler JK Forum
 
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post #1 of 6 Old 01-15-2017, 10:36 AM Thread Starter
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Rear driveshaft fail on 3.5 RK midarm lifted JKU

Only part I didn't upgrade 3 years ago when I lifted my JKU. Driving about 30 mph and BAM! The rear CV joint on the driveshaft fell out and the axle ripped the lower RK control arms off the frame. Ouch!. Tires resting on bumper when I stopped. So the 700 I saved not getting a 1350 Tom Woods driveshaftshaft on the rear is now costing me about 1200. Just posting because I read it's "not a must" to replace the rear driveshaft. It was for me.

2008 Jeep JK Unlimited. Auto. Mods: 3.5 RK Max Travel Kit, RK tie rod. 35" Nitto Trail Grappers. Eaton 4 Pinion E-Lockers front and rear. Nitro 30 spline chrome moly front axles. Yukon 5.13 gears/Cyrotreated. Sleeved and gusseted front axle. Dynatrac ball joints. Mopar big brake kit, Advance Adaptors 4wd shift linkage, Tom Woods front and rear driveshaft. Ace Rock Sliders. Terra Flex hinged tire carrier, Carolina Metal Masters grab bars. Exp One Frt Bumper. Warn Zeon 12 Winch.
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post #2 of 6 Old 01-15-2017, 01:26 PM
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Quote:
Originally Posted by Poormanz28 View Post
Only part I didn't upgrade 3 years ago when I lifted my JKU. Driving about 30 mph and BAM! The rear CV joint on the driveshaft fell out and the axle ripped the lower RK control arms off the frame. Ouch!. Tires resting on bumper when I stopped. So the 700 I saved not getting a 1350 Tom Woods driveshaftshaft on the rear is now costing me about 1200. Just posting because I read it's "not a must" to replace the rear driveshaft. It was for me.
I ran the RK mid arms and stock rear driveshaft for about 4 years (70k miles) with no issues on my 4" lifted jkur. The only reason I changed my rear driveshaft to a 1350 it because I dented the stock rear one and it became unbalanced. Sorry you had trouble with yours!
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post #3 of 6 Old 01-16-2017, 05:52 AM
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Sometimes you just never know what part is gonna let go or when. I had my front replaced after just one trip. The rear lasted for about 3 years before I dented it and had to replace it.

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post #4 of 6 Old 01-16-2017, 05:25 PM
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Yup same here still running on my stock drive shaft with a rk 3.5 lift and not spotting grease yet but I have a adams drive shaft sitting in the garage 3 years now waiting to be installed

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post #5 of 6 Old 01-18-2017, 09:56 AM
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Originally Posted by Uncle Sams Misguided Child View Post
Sometimes you just never know what part is gonna let go or when.
Words of Wisdom right there!

Sorry for your driveshaft failure and everything else it took out...

RK
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post #6 of 6 Old 01-18-2017, 10:26 AM
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You don't need a 1350 driveshaft. For most people a 1310 is plenty and a couple hundred cheaper then a 1350. Of course proper gearing will have an affect of your driveshaft. If you are running too big a tire for your axle gearing expect more wear on the driveshaft and moving to a 1350 shaft will not remove the extra stress you are putting on it.

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