Well the accident was right after I got out from getting the locker and new
gears put in. I had them remove the one inch spacers under the transfer
case also. I didn't get it that fast to see if anything was done wrong. I
also noticed that the front pinion was leaking a very little... so today I
dropped the case back down using the one inch spacers and adjusted my
control arms back so the pinion faced the output shaft again. It's gotten
alot of the vibrations out now but I notice the shaft isnt' perfectly
straight when viewed from below.

So all this makes me think of getting adjustable arms all around and an
adjustable rear track bar to get it straightened out. Does that sound like
it would work or maybe I should just get a new kit altogether.

Troy

 

Well the accident was right after I got out from getting the locker and new
gears put in. I had them remove the one inch spacers under the transfer
case also. I didn't get it that fast to see if anything was done wrong. I
also noticed that the front pinion was leaking a very little... so today I
dropped the case back down using the one inch spacers and adjusted my
control arms back so the pinion faced the output shaft again. It's gotten
alot of the vibrations out now but I notice the shaft isnt' perfectly
straight when viewed from below.

So all this makes me think of getting adjustable arms all around and an
adjustable rear track bar to get it straightened out. Does that sound like
it would work or maybe I should just get a new kit altogether.

Troy

 

Well the accident was right after I got out from getting the locker and new
gears put in. I had them remove the one inch spacers under the transfer
case also. I didn't get it that fast to see if anything was done wrong. I
also noticed that the front pinion was leaking a very little... so today I
dropped the case back down using the one inch spacers and adjusted my
control arms back so the pinion faced the output shaft again. It's gotten
alot of the vibrations out now but I notice the shaft isnt' perfectly
straight when viewed from below.

So all this makes me think of getting adjustable arms all around and an
adjustable rear track bar to get it straightened out. Does that sound like
it would work or maybe I should just get a new kit altogether.

Troy

 

You still haven't described at what point you are feeling vibes. This is
helpful in determining whether or not these are actual driveline vibes
you are feeling. A timeline of what you changed, including the accident,
would also help.

There is no reason that you would need a SYE w/ CV driveshaft AND the
transfer drop kit with a 4" lift. Lose the drop kit. Make sure you
adjust your rear pinion angle for a CV shaft, not your stock shaft. Once
you lower the Jeep to the ground, recheck your pinion angle as the
weight of the Jeep on it's suspension will change the pinion angle
slightly. Check your front pinion for excessive angle (when aligning the
front end, pinion angle should take precedent over camber). Make sure
your driveshafts are balanced.

You also should be able to get the shaft/pinion angle in line with just
the upper adjustable control arms. If you have driven the vehicle a lot
with major driveline vibes, you may have damaged your u-joints.

tw
__________________________________________________ ___________________
2003 TJ Rubicon * 2001 XJ Sport * 1971 Bill Stroppe Baja Bronco

"There is a very fine line between 'hobby' and 'mental illness'."

Pronunciation: 'jEp Function: noun Date: 1940

Etymology: from g. p. (G= 'Government' P= '80 inch wheelbase')
A small general-purpose motor vehicle with 80" wheelbase, 1/4-ton
capacity and four-wheel drive used by the U.S. army in World War II.
__________________________________________________ ___________________


Troy wrote:
> Well the accident was right after I got out from getting the locker and new
> gears put in. I had them remove the one inch spacers under the transfer
> case also. I didn't get it that fast to see if anything was done wrong. I
> also noticed that the front pinion was leaking a very little... so today I
> dropped the case back down using the one inch spacers and adjusted my
> control arms back so the pinion faced the output shaft again. It's gotten
> alot of the vibrations out now but I notice the shaft isnt' perfectly
> straight when viewed from below.
>
> So all this makes me think of getting adjustable arms all around and an
> adjustable rear track bar to get it straightened out. Does that sound like
> it would work or maybe I should just get a new kit altogether.
>
> Troy
>
>

 

You still haven't described at what point you are feeling vibes. This is
helpful in determining whether or not these are actual driveline vibes
you are feeling. A timeline of what you changed, including the accident,
would also help.

There is no reason that you would need a SYE w/ CV driveshaft AND the
transfer drop kit with a 4" lift. Lose the drop kit. Make sure you
adjust your rear pinion angle for a CV shaft, not your stock shaft. Once
you lower the Jeep to the ground, recheck your pinion angle as the
weight of the Jeep on it's suspension will change the pinion angle
slightly. Check your front pinion for excessive angle (when aligning the
front end, pinion angle should take precedent over camber). Make sure
your driveshafts are balanced.

You also should be able to get the shaft/pinion angle in line with just
the upper adjustable control arms. If you have driven the vehicle a lot
with major driveline vibes, you may have damaged your u-joints.

tw
__________________________________________________ ___________________
2003 TJ Rubicon * 2001 XJ Sport * 1971 Bill Stroppe Baja Bronco

"There is a very fine line between 'hobby' and 'mental illness'."

Pronunciation: 'jEp Function: noun Date: 1940

Etymology: from g. p. (G= 'Government' P= '80 inch wheelbase')
A small general-purpose motor vehicle with 80" wheelbase, 1/4-ton
capacity and four-wheel drive used by the U.S. army in World War II.
__________________________________________________ ___________________


Troy wrote:
> Well the accident was right after I got out from getting the locker and new
> gears put in. I had them remove the one inch spacers under the transfer
> case also. I didn't get it that fast to see if anything was done wrong. I
> also noticed that the front pinion was leaking a very little... so today I
> dropped the case back down using the one inch spacers and adjusted my
> control arms back so the pinion faced the output shaft again. It's gotten
> alot of the vibrations out now but I notice the shaft isnt' perfectly
> straight when viewed from below.
>
> So all this makes me think of getting adjustable arms all around and an
> adjustable rear track bar to get it straightened out. Does that sound like
> it would work or maybe I should just get a new kit altogether.
>
> Troy
>
>

 

You still haven't described at what point you are feeling vibes. This is
helpful in determining whether or not these are actual driveline vibes
you are feeling. A timeline of what you changed, including the accident,
would also help.

There is no reason that you would need a SYE w/ CV driveshaft AND the
transfer drop kit with a 4" lift. Lose the drop kit. Make sure you
adjust your rear pinion angle for a CV shaft, not your stock shaft. Once
you lower the Jeep to the ground, recheck your pinion angle as the
weight of the Jeep on it's suspension will change the pinion angle
slightly. Check your front pinion for excessive angle (when aligning the
front end, pinion angle should take precedent over camber). Make sure
your driveshafts are balanced.

You also should be able to get the shaft/pinion angle in line with just
the upper adjustable control arms. If you have driven the vehicle a lot
with major driveline vibes, you may have damaged your u-joints.

tw
__________________________________________________ ___________________
2003 TJ Rubicon * 2001 XJ Sport * 1971 Bill Stroppe Baja Bronco

"There is a very fine line between 'hobby' and 'mental illness'."

Pronunciation: 'jEp Function: noun Date: 1940

Etymology: from g. p. (G= 'Government' P= '80 inch wheelbase')
A small general-purpose motor vehicle with 80" wheelbase, 1/4-ton
capacity and four-wheel drive used by the U.S. army in World War II.
__________________________________________________ ___________________


Troy wrote:
> Well the accident was right after I got out from getting the locker and new
> gears put in. I had them remove the one inch spacers under the transfer
> case also. I didn't get it that fast to see if anything was done wrong. I
> also noticed that the front pinion was leaking a very little... so today I
> dropped the case back down using the one inch spacers and adjusted my
> control arms back so the pinion faced the output shaft again. It's gotten
> alot of the vibrations out now but I notice the shaft isnt' perfectly
> straight when viewed from below.
>
> So all this makes me think of getting adjustable arms all around and an
> adjustable rear track bar to get it straightened out. Does that sound like
> it would work or maybe I should just get a new kit altogether.
>
> Troy
>
>

 

I start noticing them now at around 45mph, then at 65-70. Much better
though than before. I was under again today and looks like I do need the
adjustable trackbar to get the rear driveline straight. I would like to get
rid of the spacers but I'm gonna hold off until I get the trackbar, and
probably some new adjustable control arms for the front since it has a cv
driveshaft also but no pinion angle adjustments. With the case lifted it
pointed straight back instead of to the shaft. Had the tires balanced and
rotated today also. It's not my daily driver luckily so ujoint damage isn't
great hopefully.

I remember reading in a post that in my setup the angle of the rear pinion
should be towards the output shaft, but with 1-3 degrees up for axle wrap,
is this correct?

Troy

 

I start noticing them now at around 45mph, then at 65-70. Much better
though than before. I was under again today and looks like I do need the
adjustable trackbar to get the rear driveline straight. I would like to get
rid of the spacers but I'm gonna hold off until I get the trackbar, and
probably some new adjustable control arms for the front since it has a cv
driveshaft also but no pinion angle adjustments. With the case lifted it
pointed straight back instead of to the shaft. Had the tires balanced and
rotated today also. It's not my daily driver luckily so ujoint damage isn't
great hopefully.

I remember reading in a post that in my setup the angle of the rear pinion
should be towards the output shaft, but with 1-3 degrees up for axle wrap,
is this correct?

Troy

 

I start noticing them now at around 45mph, then at 65-70. Much better
though than before. I was under again today and looks like I do need the
adjustable trackbar to get the rear driveline straight. I would like to get
rid of the spacers but I'm gonna hold off until I get the trackbar, and
probably some new adjustable control arms for the front since it has a cv
driveshaft also but no pinion angle adjustments. With the case lifted it
pointed straight back instead of to the shaft. Had the tires balanced and
rotated today also. It's not my daily driver luckily so ujoint damage isn't
great hopefully.

I remember reading in a post that in my setup the angle of the rear pinion
should be towards the output shaft, but with 1-3 degrees up for axle wrap,
is this correct?

Troy

 

Hold off on the rear trackbar for a bit. Let's see if you can dial it in
as is, first. I would definately lose the drop kit. You simply do not
need it with a quality CV shaft. (Tom Wood makes a nice one)

Try this...drive the Jeep to the speed you feel the vibes starting and
hang around that speed for this test. Just cruise and slowly accelerate
and decelerate through the vibes. Concentrate on when you feel the
vibes. If you feel the vibes on acceleration only, your pinion is
pointed too high, if on deceleration only, it's too low. They should go
away at 'coast' and not be present at both 'acceleration' and
'deceleration' if they are pinion angle related. If they don't, you have
another issue and it is probably not your pinion angle.

Now, I didn't realize you didn't have ANY adjustable control arms up
front. Yes, you need those to properly set your camber, or get it closer
to stock specs. If your camber is too vertical, you may feel the Jeep
wandering or odd steering corrections. Also, if your front driveshaft is
at too much of an angle, you can cause vibe problems. You also might
remove the front driveshaft to eliminate it, or pinpoint it, as the culprit.

tw
__________________________________________________ ___________________
2003 TJ Rubicon * 2001 XJ Sport * 1971 Bill Stroppe Baja Bronco

"There is a very fine line between 'hobby' and 'mental illness'."

Pronunciation: 'jEp Function: noun Date: 1940

Etymology: from g. p. (G= 'Government' P= '80 inch wheelbase')
A small general-purpose motor vehicle with 80" wheelbase, 1/4-ton
capacity and four-wheel drive used by the U.S. army in World War II.
__________________________________________________ ___________________


Troy wrote:
> I start noticing them now at around 45mph, then at 65-70. Much better
> though than before. I was under again today and looks like I do need the
> adjustable trackbar to get the rear driveline straight. I would like to get
> rid of the spacers but I'm gonna hold off until I get the trackbar, and
> probably some new adjustable control arms for the front since it has a cv
> driveshaft also but no pinion angle adjustments. With the case lifted it
> pointed straight back instead of to the shaft. Had the tires balanced and
> rotated today also. It's not my daily driver luckily so ujoint damage isn't
> great hopefully.
>
> I remember reading in a post that in my setup the angle of the rear pinion
> should be towards the output shaft, but with 1-3 degrees up for axle wrap,
> is this correct?
>
> Troy
>
>