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Old 06-26-2012, 05:20 PM   #1
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T-Case Lowering Question

if i jack the suspension up 3" and get a 1.25" BL, will i have to account for the body lift in how far i should drop the case, or will 3" be enough as well? let me know what you guys/girls think

Craig

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Old 06-26-2012, 05:58 PM   #2
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BL has nothing to do with the driveline. When you do the BL, a motor mount lift (MML) will lessen the amount that you need to drop the TC. The MML does affect the driveline. It also prevents having to modify the fan shroud. In my experience, a 3" lift even with the BL + MML still results in a dropped TC and the eventual need for a SYE/CV.

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Old 06-27-2012, 05:12 AM   #3
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The only reason to "need" to drop the transfercase is to stop vibrations that sometimes occur with lifts. The amount of the drop is the amount needed to stop the vibration. It may be just a few washers or up to 1" or a little more.
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Old 06-28-2012, 02:31 PM   #4
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How would i know how much to do, just play with it until the vibrations stop
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Old 06-28-2012, 04:44 PM   #5
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Quote:
Originally Posted by trailtrekkin98 View Post
How would i know how much to do, just play with it until the vibrations stop
For a 3" suspension lift and 1.25" BL + 1" MML you are looking at dropping it between 1/4" and 1/2". You can use washers to do that drop. If it turns out you need more, I have an unused 1" drop kit you can have.
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Old 06-28-2012, 08:46 PM   #6
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I have a 4" lift with 1inch drop and I still got bad vibes. at low speed.
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Old 06-28-2012, 08:49 PM   #7
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Quote:
Originally Posted by zeprider25 View Post
I have a 4" lift with 1inch drop and I still got bad vibes. at low speed.
A motor mount lift will probably fix that for you until you can get an SYE/CV shaft
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Old 06-28-2012, 10:45 PM   #8
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I run a 4 inch with 1.5 spacers rokmen 1 inch Bl and Jks mml removed t case drop. Works fine for me until I get sye
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Old 06-28-2012, 10:51 PM   #9
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Just Say NO To The Transfercase Drop. Please...Just Say NO.
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Old 06-29-2012, 06:52 AM   #10
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Skip the drop and get a lopro t-case bracket from UCF...

Under Cover Fabworks, LLC - UCF LOPRO ('03-'06 TJ) Trans. Mount
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Old 06-29-2012, 08:04 AM   #11
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As the others say it is impossible to tell as they all differ. I have a 2" suspension lift with 1.25"BL and 1" MML and still had to do a TC drop to get rid of vibes.
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Old 06-29-2012, 08:16 AM   #12
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Quote:
Originally Posted by trailtrekkin98 View Post
How would i know how much to do, just play with it until the vibrations stop
give this a read:
What is a CV shaft and why do I want one? - JeepForum.com
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Old 06-29-2012, 11:12 AM   #13
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Last year I put on a 4" Old Man Emu on my TJ (got about 5" though) and put on the transfer case drop kit. I couldn't even drive it as the vibration on acceleration was terrible. On ebay I bought the Teraflex Extreme Short Shaft Kit and CV driveline from cjtatton for just over $400 delivered. Installed in a few hours and now drives as smooth as can be. I would recommend Curtis Tatton for his drivelines very nice guy and very nice drivelines. I recently had a CV failure in the driveline (my fault I never greased it, I didn't know there was a needle grease valve in it) Gave him a call and he said send her in I'll fix it for parts only and balance it too. Tatton Driveline Services 801-685-0056
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Old 06-30-2012, 09:46 PM   #14
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Quote:
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Thanks for that link, helpful information!

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