On Mon, 5 May 2008 16:29:02 +0300, "Bill Spiliotopoulos"
<vspili@[EMAIL PROTECTED]
> wrote:
[snip]
>>
>> The noises I hear SEEM to come from the back end, but I'll keep the
>> quick disconnects in mind.
>> (One noise that I wasSURE was from the rear was actually one of the
>> front "hub caps" rattling loose!)
>>
>> So from your experience, the bottom of the differential should be
>> parallel to the ground, and not tilted up?
>>
>> TIA
>
>In the XJ (you have no CV joint in the rear driveshaft), the rear pinion
>should be set almost parallel to the output shaft of the transfer case. I
>say almost, because the rear pinion should be pointed a bit lower (0.5 -
1
>degrees) than the TC output shaft. That is because under load the rear
>pinion will rotate a bit upwards, so you have to compensate for this by
>adjusting the rear pinion a bit lower.
>In the XJ driveshaft vibrations are less noticeable than TJs, because the
>drive-shafts are much longer, and the change in angles with the lift is
>smaller.
>
>The axle vibrations feel similar the difference of going from street
tires
>to muds. If you already have mud tires, you may not feel the vibrations
at
>all, so it would be better to put a set of old street tires if you have
and
>adjust the pinion angle by trial-and-error, until you find the correct
angle
>that gives the smoother ride.
>
>In the front axle, the pinion should be almost parallel to the
driveshaft,
>again 1 degree lower that the parallel position, to permit the U-joint
>bearings to rotate for proper lubrication. If you noitice death-wobble,
you
>may want to lower to front pinion a bit more to increase the caster
angle.
>
>
>Regards,
>Bill Spiliotopoulos.
>'96 XJ,
>'06TJ.
>
It's interesting that ULB has the same symptoms in his (already broken
in?) TJ as I have in my XJ.
Describing it as being similar to changing to Mud tires is a good way
to say it. And although I am *hearing* the pulsing sounds, there is NO
discernable vibrations to be felt at the transmission or XFR case
****fters :/
My rear pinion points upwards, in line with the driveshaft. Then at
the forward u-joint in makes a modest bend (I have yet to measure the
angle) and goes into the XFR case (which I believe is still parallel
to the ground, but I do have a lowering kit installed).
This sounds wrong according to what you state above :(
I haven't really looked at the FRONT, but I have no "death wobbles".
I do know however, that my Castor angle is one degree beyond stock
specs (9 degrees - stock is 5.x to 8).
I need to take it back to the mechanic to investigate some rattles, so
I plan on having him see if he can adjust it any better.
TIA
....
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