What tools do I need?

The bushings will normally have a *tiny* bit of play, that's where that 1
degree comes from.

"DougW" > wrote in message
news:3lGOg.12373$JR5.10944@dukeread11...
> Troy wrote:
>
>> I read somewhere on a website about having it 1 degree lowered for
>> axle wrap, but I'm sure I wont be able to judge a degree until I get
>> the angle finder huh... I wish I had more time today to mess with it
>> but I gotta be asleep by 7:30 to be up for work at 3am. ugh.
>
> By the way, there is no axle wrap with link suspension, only with leaf
> springs. That's why they make traction and ladder bars. If your getting
> axle wrap with a link suspension then the bushings are toast.
>
> Once the angle is set, the four links maintain that angle. (within reason)
>
> Anyhoo..
>
> You should start with a full tank of fuel and no cargo
> on flat ground (concrete) not on grass/gravel/or dirt.
>
> To measure the angle you place the angle finder on the output yolks
> ear. i.e. side closest to the transmission case and side closest to the
> diff. You measure one ear, rotate the shaft 180, measure the other ear,
> and take the difference. Make sure the bearing cap is flat or you will
> get an off reading.
>
> The difference between front and rear should be no greater than 1.5
> degrees.
>
> As for +1 offset, I dunno. My ZJ is bone stock and it reads about .5
> high at the rear on a full tank.
>
> --
> DougW
>
>

One more thing before I start...

The rear adjustable track bar, should I be setting the rear end where it is
evenly under the jeep, as in the tires are both poking out the same distance
from the sides or am I straightening the driveshaft when viewed from below?
I notice that the pinion is a bit offset from center on the rear end and
dont know if too much angle there could be causing some vibes...

Oh I found an angle finder at home depot for $7.00, woohoo!

Troy

"Matt Macchiarolo" > wrote in message
. ..
> Remember that if you have a CV rear driveshaft with a slipjoint, the
> pinion should be at the same angle as the driveshaft. If you have the
> stock slipyoke (not recommended with a 4" lift) the pinion should be
> parallel with the output shaft.
>
> And that friend now owes you a 12-pack.
>
> "DougW" > wrote in message
> news:i8FOg.12365$JR5.10661@dukeread11...
>> Troy wrote:
>>> I have recently put on an adjustable rear track bar on my 4" lifted
>>> TJ, and had to take off my upper rear adjustable control arms to get
>>> some other stuff adjusted. When they were off a friend who was
>>> watching/helping screwed them all the way down so now I'm having to
>>> find the sweet spot all over again for my pinion angle.
>>>
>>> The problem is, I just can't seem to find it anymore. I eyeballed it
>>> last time and there was a slight shake at 65mph, but now I just can't
>>> find where they need to be. So I'm gonna get the angle tools to do
>>> it, but I'm not sure which kind I need. An angle finder of some sort
>>> I'm sure, but if anyone out there can tell me what to go buy so I can
>>> measure my angles and get everything done perfectly I would be happy!
>>> I'm tired of crawling under, adjusting, crawling up, opening the gate
>>> to the yard, test driving, opening the gate again, crawling under,
>>> etc etc etc.
>>
>> Simple angle finder with a magnetic base and a tape measure.
>> http://www.vincihiperformance.com/vi...LE%20METER.jpg
>>
>> The trick is to get both upper links exactly the same length and keep the
>> proper
>> shaft angle while keeping the rear axle parallel to the front. You
>> should be
>> able to get close enough by measuring the links from center bolt to
>> center bolt.
>>
>> --
>> DougW
>>
>>
>>
>
>

Troy wrote:
> One more thing before I start...
>
> The rear adjustable track bar, should I be setting the rear end where
> it is evenly under the jeep, as in the tires are both poking out the
> same distance from the sides or am I straightening the driveshaft
> when viewed from below? I notice that the pinion is a bit offset from
> center on the rear end and dont know if too much angle there could be
> causing some vibes...

offset is fine, just as long as the angles are the same.

The control arms need to be riding properly with the vehicle on
level ground and a full fuel tank. I'd probably measure the axle
to frame at a couple of points then try to duplicate those with the
new track bar, but since your lifting it might be better to use a
plumb bob from a point on the frame to a mark on the axle. Remember
to mark with some tape or a pen should the plumb bob fall off. I
find a lead fishing weight and one of those powerful little magnets
work fine. Although you could just tape the line to the underside
or hang it off a frame member.

--
DougW

Ok cool. I adjusted it today to pretty close, within 2 degrees of being
straight, and it felt a lot better. The only way I can tell something is
vibrating is when looking at the mirrors.

Eyeballing it, I was waaaay off! I don't know how I did it before but it
must have been one lucky guess.

Thanks for the suggestions, I will measure and check everything out tomorrow
and let ya'll know how it went.

Troy


"DougW" > wrote in message
news:cvjPg.12523$JR5.11517@dukeread11...
> Troy wrote:
>> One more thing before I start...
>>
>> The rear adjustable track bar, should I be setting the rear end where
>> it is evenly under the jeep, as in the tires are both poking out the
>> same distance from the sides or am I straightening the driveshaft
>> when viewed from below? I notice that the pinion is a bit offset from
>> center on the rear end and dont know if too much angle there could be
>> causing some vibes...
>
> offset is fine, just as long as the angles are the same.
>
> The control arms need to be riding properly with the vehicle on
> level ground and a full fuel tank. I'd probably measure the axle
> to frame at a couple of points then try to duplicate those with the
> new track bar, but since your lifting it might be better to use a
> plumb bob from a point on the frame to a mark on the axle. Remember
> to mark with some tape or a pen should the plumb bob fall off. I
> find a lead fishing weight and one of those powerful little magnets
> work fine. Although you could just tape the line to the underside
> or hang it off a frame member.
>
> --
> DougW
>