Daven75
NAXJA Forum User
- Location
- Plainfield, IL
I just put on a 1.5" rough country shackle and spacer lift with new shocks. I haven't driven it that much yet but I wanna make sure these driveline angles look ok. Its on a 2000 xj with the 4.0 4x4.
1.5/2" lift driveline angles?
- Thread starter Daven75
- Start date
yossarian19
NAXJA Forum User
- Location
- Grass Valley, CA
Not "perfect" but looks good. At 1-2" lift you shouldn't have any issues.
lazyxj
NAXJA Member #1310
- Location
- Los Angeles
There is no way we can tell from photos what and if your angles are correct.
You need to actually measure the angles to see if they are within limits, using an angle finder.
A 2" lift can require a 1/2"-3/4" transfer case drop to correct the rear
drive-shaft's u-joint angles and to prevent noticeable vibrations.
Check the front shaft's pinion angle while you are at it. Keep it at or under 1 degree.
When lifted, 97+ models, as a whole, are more sensitive to angle changes than earlier models.
You need to actually measure the angles to see if they are within limits, using an angle finder.
A 2" lift can require a 1/2"-3/4" transfer case drop to correct the rear
drive-shaft's u-joint angles and to prevent noticeable vibrations.
Check the front shaft's pinion angle while you are at it. Keep it at or under 1 degree.
When lifted, 97+ models, as a whole, are more sensitive to angle changes than earlier models.
ColoradoRaptor
Headbanging Hillbilly
- Location
- Canon City, Crawlorado
Pinion looks a tad low. Angles should be the same at both joints with that type of shaft.
ftwelder
NAXJA Forum User
- Location
- Rockinham, Vermont
Mine are amazingly worse that that! I guess I have been lucky that I haven't had a vibration issue. What is considered the practical limit for the stock joint/shaft?
WB9YZU
NAXJA Forum User
- Location
- Madison, WI
One can't tell much from a photo unless the angles are really jacked up.
1.5-2" of Spring lift usually doesn't need anything as both U-Joints change angle the same.
1.5-2" of Shackle lift may or may not need adjustment.
Does it vibrate at any speed? If not, walk away.
The result of installing a lift shackle is rotating of the pinion up (Reducing the DS/Pinion angle). Installing a drop may restore that relationship, however the only way to know for sure, is to measure both the TC/DS and DS/Pinion angles, they should be within 1 degree of each other: Equal and opposite, like an extended Z.
The problem with drivelines is that they have 2 sides, and you can't affect a change to one side without seeing a change on the other.
Maximum operating angle on a single joint is around 6 degrees, OEM you won't see them much more than 2.5 degrees.
-Ron
1.5-2" of Spring lift usually doesn't need anything as both U-Joints change angle the same.
1.5-2" of Shackle lift may or may not need adjustment.
Does it vibrate at any speed? If not, walk away.
The result of installing a lift shackle is rotating of the pinion up (Reducing the DS/Pinion angle). Installing a drop may restore that relationship, however the only way to know for sure, is to measure both the TC/DS and DS/Pinion angles, they should be within 1 degree of each other: Equal and opposite, like an extended Z.
The problem with drivelines is that they have 2 sides, and you can't affect a change to one side without seeing a change on the other.
Maximum operating angle on a single joint is around 6 degrees, OEM you won't see them much more than 2.5 degrees.
-Ron
VAhasnoWAVES
NAXJA Forum User
- Location
- Lake City, Mi
id be more worried about the wet spot on your transfer case.
93gc40
NAXJA Forum User
- Location
- Visalia, California
Why, doesn't look any worse than the one on the pinion.
Drive it to a hardware store or Harbor freight. Buy and angle finder and a tape measure.. When you get home measure the pinion angle, shaft angle and TC output. Post the numbers.
