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stuntmansjeep 05-20-2013 04:12 PM

So I have started threads and read threads about me jeep vibrating. I have replaced my U-bolts which sorta helped because they were bad and now I'm hearing it could be either that the U-joints are bad OR that when the lift was put in that the transfer case wasn't dropped like it was supposed to be. Before I go get the U-joints checked out how do I know if the transfer case has been dropped or not?

DILLIGAF 05-20-2013 04:39 PM

how much lift? 2" none. 4" lift needs 1" transfer case drop. To help with drive shaft alignment.
However this is just my opinion,

tigerblood 05-20-2013 04:47 PM

even a 2-2.5" lift may need a tc drop. Just look at your belly skid and see if there are spacers of any kind between the frame and the skid.

stuntmansjeep 05-21-2013 12:48 AM

5" lift. I'll post pictures tomorrow if I can't figure it out

SquareLite 05-21-2013 12:55 AM

When are the vibrations most noticeable? At why speed? Another thing to consider is your drive shaft may need to be balanced again if you had it lengthened. New tires out of balance? Are you running a slip yoke eliminator and a double Carden joint?

stuntmansjeep 05-21-2013 10:24 AM

At about 50mph. I have no idea about an extended yoke or anything but I've had a few people tell me I might need to do something with the driveshaft/U-joint but I saw a few people on threads saying that dropping their transfer case fixed everything.

stuntmansjeep 05-21-2013 10:25 AM

Also I got new tires and replaced most of the front end myself but I got the tired and car totally alighted other than the driveshaft

Nubby55 05-21-2013 09:35 PM

nothing to aline but set the toe-in, you can do it your self with a tape measure in about 15mins.

Speedy4x4 05-21-2013 09:39 PM

You need either at T-case drop or a slip yoke eliminator.

stuntmansjeep 05-21-2013 10:18 PM

How much of a t-case drop would I need for 5" lift?

SquareLite 05-22-2013 12:00 AM

A tease drop can be purchased in a kit or probably made by yourself. Mine is about 3/4". It's just rectangular tubing on both sides. Cut the same length as the skid plate and drilled out the bolt holes. I run a sye as well

stuntmansjeep 05-22-2013 08:39 PM

3 Attachment(s)
Attachment 252463

Attachment 252464

Attachment 252465

stuntmansjeep 05-22-2013 08:40 PM

This is what it looks like

SquareLite 05-23-2013 01:20 AM

That is the factory slip yoke and a transfer case drop. I like the load of the transmission and t case to be more evenly distributes than on a couple of small spacers, so if it were mine, I'd think about changing it down the road to a beefier setup. It's a very cheap and easy fix.

wrangleryj90 05-23-2013 01:24 AM


Originally Posted by stuntmansjeep (Post 3783588)
This is what it looks like

Slip yoke looks to be out a bit far

stuntmansjeep 05-23-2013 01:34 AM

So I'm assuming that means I need a slip yoke eliminator?

stuntmansjeep 05-23-2013 01:37 AM

What do you recommend I use for redoing the t case drop?

wrangleryj90 05-23-2013 01:42 AM


Originally Posted by stuntmansjeep (Post 3784420)
So I'm assuming that means I need a slip yoke eliminator?

I would say yes it does might be able to just get a longer driveshaft also idk how your angles are or would be

stuntmansjeep 05-23-2013 08:34 AM

stuntmansjeep 05-23-2013 08:35 AM

Would this be an ideal slip yoke eliminator that I ca get?

wrangleryj90 05-23-2013 10:18 AM


Originally Posted by stuntmansjeep (Post 3784943)
Would this be an ideal slip yoke eliminator that I ca get?

I don't know it doesn't say what transfer case it goes too

stuntmansjeep 05-23-2013 10:59 AM

I looked up yoke eliminators for a jeep wrangler yj. Are there different transfer cases for a yj?

wrangleryj90 05-23-2013 11:15 AM

I don't think so but I would make sure you have a np231

jokerchief462 05-23-2013 11:18 AM

2 Attachment(s)
When the Jeep is lifted a lot of things get changed and the driveline angle is one of them. The springs may have come with shims/wedges to get the pinion angle up and with the stock shaft in it may have the wrong angle. The T-Case drop is good for some but not all. Then you have to look at the dirveshaft slip yoke and determine at full extension of the suspension is the shaft going to stay on the out put shaft of the T-Case or possibly fall off. It happens more than one would think. The SYE kits remove that problem but cost $$$ and then you need a new shaft as well. But in the meantime look at the pics attached for driveline angle. Or you can go to Tom Woods website and do a little reading on there home page right side grey banner Technical Information. This is where I got the picture from.

With a slip yoke joint on the driveshaft this is what you angles should be the pinion should be parralell to the driveshaft.

The second picture is from a YJ with your setup from a hrad day of trail riding.

stuntmansjeep 05-23-2013 11:28 AM

Why would you need a new drive shaft when you get a SYE?

wrangleryj90 05-23-2013 11:29 AM

Old drive shaft won't connect to it you need as shaft with a joint I have heard you can pull one of of a grand tho

stuntmansjeep 05-23-2013 11:34 AM

Of of a grand? Like a grand Cherokee?

wrangleryj90 05-23-2013 11:40 AM


Originally Posted by stuntmansjeep (Post 3785510)
Of of a grand? Like a grand Cherokee?

Yes my phone doesn't like off lol

stuntmansjeep 05-23-2013 11:43 AM

What year grand Cherokee?

wrangleryj90 05-23-2013 11:48 AM


Originally Posted by stuntmansjeep (Post 3785540)
What year grand Cherokee?

That I don't know

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