willtoskie

Hey all,
After much frustration and curse words, my 3 inch RC series II kit is finally all hooked up in my 00. Sits nice! However, I'm noticing some obvious driveshaft vibration when I'm going up hill and what almost sounds like a grinding noise right when my foot just touches or just leaves the throttle. I'm guessing this isn't just something that gets broken in, so do I really need to drop my t-case with a 3 inch lift on stock wheels? Thanks!

Jeepxj1234

Yes. Tcase drop should fix it.

rtralabama

X2, simple and easy fix. mine wasnt too bad with 4" on 32s but now its barely even there.

willtoskie

It just sucks, I only went 3 so I wouldn't have to drop my transfer case. But I'm learning now nothing is ever that easy. Thanks!

1plunk

A tcase drop is only a bandaid for the real problem, which is the stock driveshaft, if you have $200 buy the hack and tap SYE and refurbished driveshaft from Iron Rock Offroad. It's the cheapest way to solve the problem in the correct way. Install is easy.

I had the same issue and jumped at the opportunity when a local guy had one up on Craigslist, installed and it works like it did the day I bought it.

nickxj94

i didnt on my 2000xj it has 31s only issues i have are the trackbar is worn out lol but i dont have any vibes.. u may want to check the u joints first before u spend a bunch of money on driveshafts and sye i dont have it on either of my xjs lifted on 3 inch rc..just my 2cents..

Gaffney982

I did a 3" lift on my '97 XJ and had to do a TC drop. I'm gonna do an SYE + Driveshaft eventually since I'll want to go bigger sooner than later.

Eggering

Same frustration here man, I installed the same exact lift on my 99'. I ordered the sye hack and tap and driveshaft kit from IRO Hopefully it will arrive before the weekend so I can do the install....If interested Ill let ya know how it works out

Jeepxj1234

Definitely post up on how it goes. Maybe even some pics. I'm looking at doing this eventually.

Lucky Jeff

Get a front end alignment and have them set the caster. A simple caster adjustment was all mine needed to get rid of the vibration that was actually coming from the front, didn't realize that until I had the caster changed. It's a cheap fix to make sure that isn't the issue.

Goober

I did the same lift on my 2000 and had vibration also. I think the grinding noise is the slip yoke(the slop in the splines when the driveline is no under load). I put 2.5 degree shims under rear springs and it helped but should have gone to 4 degree shims. I am also dropping t case soon until I have enough pennies to get SYE and new driveline. I love the lift so far,no issues. I went in for alignment and it was still within specs also.

Jeepxj1234

Just do a tcase drop. It should reduce vibes drastically. I did all of this tried shims, didn't work, tried different shims, didn't work, started to get mad, finally did a tcase drop, no vibes. Id start with the drop, if that doesn't work the hackntap from iro.

XJdryva

Next time lift with shackles. Helps with the DS angle

bnkk

I had same thing even after tc drop then week by week got better now have zero vibes. The lift needed to settle it was like 4" or more the day i put it on

willtoskie

So you think I should wait a while for everything to settle in before I start replacing stuff? And how much damage should I expect to be doing with those noises?