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-   -   Crossmember/TC Lowering - Why? (http://www.jeepforum.com/forum/f13/crossmember-tc-lowering-why-1609177/)

ryanf77 09-21-2013 03:05 PM

Crossmember/TC Lowering - Why?
 
I searched the Forum and Couldn't find an answer for this... I just finished installing a Rough Country 3.5" Kit on My Son's 96 ZJ. Is it necessary to install the Transfer Case Lowering Blocks? If so, Why? I am asking because it just makes Me lose some of the nice clearance I just gained!!!

Thanks in Advance...

psychoteen101 09-21-2013 03:12 PM

By lifting the suspension, you change the driveshaft angle. Lowering the crossmember drops the T case and helps re correct the angles. Its not a huge difference, only about an inch of drop. Ground clearance isn't a huge factor with that. Theres a reason it came with the kit, so it should be installed. If you don't, you might get driveline vibrations.

WhiteOut 09-21-2013 03:19 PM

Quote:

Originally Posted by psychoteen101 (Post 16201049)
By lifting the suspension, you change the driveshaft angle. Lowering the crossmember drops the T case and helps re correct the angles. Its not a huge difference, only about an inch of drop. Ground clearance isn't a huge factor with that. Theres a reason it came with the kit, so it should be installed. If you don't, you might get driveline vibrations.

OP: You can disregard the quoted post. Next he'll tell you that you need an SYE:rofl:

You don't need to install the transfercase drop. Yes, it will help the rear angle a bit, but it hurts the front angle.

Rushton623 09-21-2013 03:24 PM

I have a 3.5 lift and don't run the t case drop and haven't noticed a thing. You should be fine

PCsZJ 09-21-2013 05:08 PM

Running an IRO 3.5 lift with no transfer drop..No problems here also

PolkaPower 09-21-2013 06:24 PM

You don't need it. I was at 4.5 with no issues.

98GCLimited 09-21-2013 06:26 PM

Quote:

Originally Posted by PCsZJ (Post 16203233)
Running an IRO 3.5 lift with no transfer drop..No problems here also

x2

dnuccio 09-21-2013 06:29 PM

from what ive read on here, ZJ will never need a transfer case drop. it might need a SYE at really high lift heights (7"+), but a t case drop is a waste of money

LoveHate 09-22-2013 12:10 PM

I had vibes in the front with the tc drop, now without the drop I have no vibes. so the drop is a total waste of ground clearance.

Texas ZJ1 09-22-2013 12:31 PM

I had it on mine.. oh disbelieving masses.

Niles19 09-22-2013 05:16 PM

Every zj is different I had vibes w/o then I took out mine front DS and they went away. So I put in the TC drop and they are gone. who knows maybe I need to adjust my upper ca's but the TC drop doesn't bother me. just go w/o and see what happens.
Quote:

Originally Posted by Texas ZJ1 (Post 16221041)
I had it on mine.. oh disbelieving masses.


Texas ZJ1 09-22-2013 07:05 PM

Wow, after 19 years I'm just now hearing this?

Thanks, go read the FAQs page.

Hunter

speedbucket 09-23-2013 10:38 AM

The Rc 3.5 kit is an incomplete lift. depending on which transmission you have you may not need it

ryanf77 09-24-2013 10:04 AM

So, I took the Jeep out last Night for a Cruise after the Lift and I think I answered My own Question... I have really bad vibration coming from the Rear... Guess I need to try the Drop Kit and see if that fixes it... Thanks again for all the reply's everyone... Ryan

ryanf77 09-29-2013 06:58 PM

Update: I installed the Cross-Member Lowering Kit that came with the lift kit and it helped some... But, at about 35mph the vibration starts and it's still pretty bad! It goes away for the most part when I let off the throttle... I have the Rear Drive Shaft out now and am going to install new U-Joints to see if that fixes it but I am doubtful that it will as they feel pretty tight... I'll update again once the U-Joints are in in a couple days...


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