just did a 3.5inch BDS lift on my yj jeep. theres a little vidration now, - Jeep Wrangler Forum
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Old 06-16-2015, 08:17 PM
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just did a 3.5inch BDS lift on my yj jeep. theres a little vidration now,

anyone had any luck with a transfer case drop?

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Old 06-16-2015, 09:22 PM   #2
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I have a 4.5 lift and have a tranny drop that I guess to be about 1 to 1.5 drop and I have no vibrations at all. Why did the lift you bought have no tranny drop?

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Old 06-16-2015, 10:13 PM
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I bought the springs off Craigslist and bought new shocks and other things.
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Old 06-16-2015, 10:52 PM   #4
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Yea that's your problem, I would definitely get a TC drop, did you get brake line extensions also? If not I would get those. The second you decide to articulate you'll be screwed if not.

It's not enough in my opinion to need an sye or anything like that but a lot of guys do that anyways which is not a bad thing
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Old 06-17-2015, 08:01 AM
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I have extended brake lines. Thanks for the info
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Old 06-17-2015, 09:09 AM   #6
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3.5" lift will definitely throw your drive lines off!!!
TC drop at a minimum is required. Even at that you'll probably experience some vibs due to the DS angle changes and the way the u-joints are worn in.
I thought my vibs weren't too bad...finally installed a SYE and TW CV DS...it's like driving an entirely different vehicle! (~4" lift Springs and Booms). If I had known there would be that much of a difference I would have done it when I lifted it. Hindsight is always 20-20.

Bottom line is if you lift your Jeep invest in the SYE and CV DS...you and your Jeep will be much happier for it!
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Old 06-17-2015, 12:58 PM
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What is a CV DS
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Old 06-17-2015, 01:05 PM   #8
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CV Drive Shaft
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Old 06-17-2015, 01:27 PM
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Sorry. Is that for the front? I'm a hotrod guy and just getting into the jeep world. I've researched sye, I'll get that eventually. For now I'll have to go with TD
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Old 06-17-2015, 01:28 PM
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Another question I have is will the vibration damage anything
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Old 06-17-2015, 01:59 PM   #11
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The SYE is a Slip Yoke Eliminator which eliminates the tail cone and seal on the Transfer Case (TC). It also replaces the main shaft with a shorter and stronger one. You'll also need a CV drive shaft. Tom Woods is a well know brand used by many Jeepers.

Here's Tom's website. Click on the "Tech Info" link in the upper right hand corner. Tom Wood's Custom Drive Shafts - Tom Woods Custom Drive Shafts Custom Driveshafts Specialist

As long as the "vibs" aren't too bad you shouldn't damage anything. Over a long period of time it could induce bearing and u-joint wear.

The SYE and CV drive shaft is for the rear as shown below...
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Old 06-17-2015, 08:20 PM
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Thanks for your help. The vibration is minimal.

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