Bellkrank

I just finished my lift. 3.5" RE, did a t-case drop of 1" but really the spacers are only 3/4th (the package said 1 ") and running 235 wheels which = about a 29".
I test drove and got it aligned and it has a pretty good drive line vib to it.
I want to run 31" tiers but dont have the cash right now.

So my Q's are
will the bigger tires do the trick and end the vib?
how far can i drop the t-case?..add some washers to equal 1" or go to 1.5" ? how long can i drive with the vib before it hurts anything? what will it hurt?

thanks!

jmm0122

No bigger tires will not end driveline vib. I wouldnt drop the t-case more they you have already. 1 to 1.5 is the max. As it is a t-case drop is going to kill your motor mounts over time. You probably need a sye if you have a 1" drop and you still have vibes. Shims may help but I doubt it.

xjoffroad

all of this ^. time for a SYE

BLACKSPORT

I think that it will help, but like they said you will prob need more. The tires will only help a slight amount, so not worth getting crappy tires/ ones you don't want, just to not get far on the vibes

xjoffroad

tell me how larger tires will stop driveline vibes?

Bellkrank

Yeah your right ^ . after thinking about it there is no way that would help. the tires will raise the whole vehicle not the driveline. since the spacers i hace are only 3/4th of an inch im going to try to drop it more (about to 1 full inch). and yes i know that t-case drops are bad but its only for the time being until i can get a SYE i just dont have the $400 for one!

about the things il hurt running with vibs? u-joints? tranny? t-case?

xjoffroad

you dont need $400 for a SYE. buy advance adapter SYE for $250, rebuild a stock xj front driveshaft for under $50 and you are done!

you will hurt where the driveline goes into the TC because of vibes, you will destroy ujoints, the vibes will also shack some things loose, and the tc drop will destroy motor mounts

BLACKSPORT

BC i felt a difference between my 225 street tires and my 30" a/t when i did my first lift. I am not say it will get rid of them, i am just saying that it will lessen them to a point. Hince why i said not worth jumping on the first set of tires he sees DUH and from what i have read RE always lift higher than what lift says so he is probably like 4-4.5 since he just put it on. Maybe coinidence on my experience but experience none the less!

Andrew0257

I would lower the tc case a little more and add a 3* shim to the axle. Put some miles/wheel it let it settle.

xjoffroad

what about blow out motor mounts? if he does lower it more, motor mounts will be a large issue.

Andrew0257

A 3.5" lift should not need a sye. Currently stated the tc drop in only 3/4" he should be able to add 1/4" and be ok. After it settles he could take out the extra 1/4".

xjoffroad

tc are just a band aid. i have seen many xj's through the shop that needed SYE at 3". every xj is different. the only real way to fix it is a SYE

jeepkid03

Actually a 3.5" lift will sometimes need a SYE, especially with 96+ XJs that have the different T-case output. I've seen XJs with only 2" lift that still had vibes after a T-case drop. The RE 3.5" kits commonly lift the jeep more than 3.5" also. Most get 4-4.5" out of their kits.

No matter the lift, if you put in a T-case drop and it doesn't fix it, that means you need a SYE or have other driveline issues to address.

rich

Tires wtf ,Drop it more that s just stupid.You guys are suppose to give the person an answer that is close to being right The guy has a 2000 xj ,97+ xjs are prone to driveline vibs at about 3 to 3.5 inch lifts +, he needs an SYE PERIOD ,if you dont know than way waste his money go waste yours.Sorry if you dont like this answer.

xjoffroad

x2 needs a SYE like I have said numerous times. I to hate when someone gives advice that makes no utter since. shut up if you dont know what you are saying.