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Unread 02-07-2012, 02:35 PM   #1
tjsmith63
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1998 TJ Wrangler 
 
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HELP: Rear Vibes after SYE

I Recently installed a 2" BDS lift, rebuilt transmission & transfer case, new clutch, and now a SYE and CV Drive Shaft from Tom Woods.

I installed the new SYE and CV because I was gettng the terrible rear vibes in second gear after installing the lift.

Now the new Tom Wood's Super Duty Tail Shaft Conversion kit is installed and the pinion is lined up one degree below the DS angle and I am still getting slight vibes at 70mph and over. I called Tom Woods and their people are extremely helpful and take time to go over everything in detail. They think it is probably a faulty CV ball or out of ballance DS so I am going to send it back to them.

It appears that the vibes have damaged the pinion seal as well as I can see diff fluid coming from the pinion.

I need advice on what all I should do to the rear pinion while I send my DS back to Tom Woods. I am running the Dana 35 it has 120k miles on it, and I get the howl when I take my foot off the gas at high speeds.

Any advice will help. Bearings, Seals, which bearings are best, what am I missing, etc.

Thanks for the help!


Last edited by tjsmith63; 02-11-2012 at 09:06 AM..
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Unread 02-07-2012, 02:57 PM   #2
scot68
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Since you plan to go up to a 33" tire (your profile) and the fact you lifted the Jeep I assume you intend to wheel it. I would not put any money into the excising Dana 35. Think about stepping up to an Ford 8.8 or a Dana 44.
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Unread 02-07-2012, 03:46 PM   #3
greene69
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I don't think that would fix a death wooble, but a great mod
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Unread 02-07-2012, 05:58 PM   #4
TJ-chopper
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SYE has nothing to do with D/W, you have a problem up front, CASTER, TRACK BAR, TOE IN, TRE's, BALL JOINTS, check everything UP FRONT FOR D/W.
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Unread 02-07-2012, 10:01 PM   #5
tjsmith63
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I muse be using D/W to describe the wrong thing. I had terrible rear drive line vibes that would shake the entire rear end. That is now gone with SYE just getting small vibes at about 70MPH.
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Unread 02-07-2012, 11:17 PM   #6
jon1371usmc
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Try it at 0* and if that doesn't cure it then check thé vibes at 2-3* and see if that corrected the problem.
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Unread 02-07-2012, 11:28 PM   #7
stottman
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The general consensus on a sye kit is put the pinion angle 2* below the tc output shaft, I didn't see in ur profile if u have adj. uca but i'm assuming u do if u set it at 1* below.
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Unread 02-08-2012, 08:44 AM   #8
tjsmith63
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I set it at 1* below using cam bolts, as I expected...they did not hold the axel in place. I am going to purchase upper adjustable control arms to set it that way. Any suggestions on which ones to get? I am looking at the BDS adjustable with flix joints to keep the contril arms the same manufacturer as the lift. Does anyone have complaints about these control arms? I am also looking at the JKS control arms?

What are everyone's thoughts on rear upper control arms?
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Unread 02-08-2012, 09:30 AM   #9
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Quote:
Originally Posted by tjsmith63 View Post
I set it at 1* below using cam bolts, as I expected...they did not hold the axel in place. I am going to purchase upper adjustable control arms to set it that way. Any suggestions on which ones to get? I am looking at the BDS adjustable with flix joints to keep the contril arms the same manufacturer as the lift. Does anyone have complaints about these control arms? I am also looking at the JKS control arms?

What are everyone's thoughts on rear upper control arms?
Yep, cam bolts won't do the job. Take a look at Savvy Offroad for control arms.
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Unread 02-08-2012, 11:06 AM   #10
stottman
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Yeah it pretty much required to at least use adj. uca's. I haven' heard anythin bad about BDS but I hear alot of good about JKS and savvy.
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Unread 02-11-2012, 09:06 AM   #11
tjsmith63
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Purchased the Rubicon Express UCAs. Should be in Tuesday. Thanks for thelp.
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Unread 02-11-2012, 09:15 AM   #12
GringoLoco
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Quote:
Originally Posted by tjsmith63 View Post
Purchased the Rubicon Express UCAs. Should be in Tuesday. Thanks for thelp.
I used the Rubicon Express UCAs when I did my SYE a few years ago, no problems with them at all.
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