Extended/CV Driveshaft on 4.5" Lift? - Jeep Wrangler Forum
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Old 05-15-2011, 09:11 AM   #1
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Extended/CV Driveshaft on 4.5" Lift?

Right now I have a Black Diamond 1.5" and 1/2" lift shackles. Im thinking about running the RC 4" lift to bring my total up to 4.5". I was wondering if i NEED to change out my stock driveshaft. This jeep is not going to be used for any wheeling besides very light dirt roads. Ive heard of plenty of people not changing their driveshafts for 4"...but I wasnt sure since when the lift is new it might give me like 5 or more inches before settling. I already have my transfer case dropped. Love to hear your guy's opinions. Thankss.

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Old 05-15-2011, 09:22 AM   #2
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You may get lucky and not need a CV shaft. Each Jeep has it own issues. Like you stated, many do not need a new drive shaft, while others cannot get rid of vibration problems without a SYE and CV shaft. 4" is where people start to see a lot of problems.

There is another member on this sight that goes by "Ibuildembig". He has done several spring over axle conversions and states that he will never use a CV shaft. You may want to contact him by PM and see if he has any suggestions. Good luck.

Jeff

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Old 05-15-2011, 12:31 PM   #3
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I would plan on the expense. I added a 4"procomp lift to my 3/4" shackle lift. I found that the 2 degree wedge that came with the lift wasn't enough to compensate for the new pinion angle. The lift kit came with a 1" transfer case drop but it wasn't enough to get rid of the vibration.
In the end I ended up with a SYE and custom built CV drive shaft and a 9 degree wedge for the pinion angle offset. Total bill was a grand.
Just sayin, plan to spend it before you put on the lift. if you don't need it, you got extra for other mods...
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Old 05-15-2011, 04:35 PM   #4
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I just installed a JB super short sye 300 plus shipping and had a custom cv drive shaft made for 350$ there's another option that would be way cheaper drop your trans/t-case 2 inch drop would help and throw in some shims if needed.
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Old 05-15-2011, 06:54 PM   #5
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It's a DC shaft not a CV shaft. Double carden
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Old 05-15-2011, 07:14 PM   #6
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It's a DC shaft not a CV shaft. Double carden
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Old 05-15-2011, 07:21 PM   #7
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From Tom Woods site:

"For the Double Cardan (CV) drive shaft we have two options available."





Double Cardan is the style of Constant Velocity Joint....

Just to make things clearer.
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Old 05-15-2011, 07:44 PM   #8
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I used a advanced adapter SYE and CV joint, did't drop the trans/transfer case and never had a problem.
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Old 05-23-2012, 11:14 PM   #9
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I used a advanced adapter SYE and CV joint, did't drop the trans/transfer case and never had a problem.
Do you have adjustable rear, upper control arms? I hear you need those in-order to get your pinion angle right...
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Old 05-24-2012, 01:37 AM   #10
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Either way it is a good idea to get rid of the slip yoke for off road use. Nothing will leave you stranded quicker then an empty T case. I bought the combo kit from CJ Tatton on eBay for $460 delivered. It comes with a teraflex SYE and a Tatton custom CV driveshaft. You have to shim the rear diff to get the right pinion angle with a cv anyway. It needs to point at the rear yoke on the T case.

Btw I broke the pinion yoke on my rear diff when a strap broke on me. I drove home using front wheel drive after I took the rear driveshaft off. I couldn't have done that with a slip yoke. Just something to think about. I wasn't doing anything crazy either. Just a dirt road and a few small rocks. Just something to think about.

I would go for the SYE. I had vibes with 4" RC lift and 1" shackle.
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Old 05-24-2012, 01:39 AM   #11
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BTW you don't have upper control arms on a YJ.

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