vibration

M

Mike Mettlach

NAXJA Forum User

Location

colorado

• Jul 7, 2004

• #1

Just installed a 3" lift on my 98' XJ. The kit included an add a leaf in the rear and taller coils in front. I have a slight vibration occuring (that wasn't their before) upon acceleration and de-acceleration. Any suggestions on a fix?

 

mgt

NAXJA Member #653

Location

Riverside

• Jul 7, 2004

• #2

You might need a sye . most all xj's ( 97 up ) have this problem.

 

mtnranger

NAXJA Forum User

Location

conifer,co.

• Jul 7, 2004

• #3

Try 4 degree shims under the leafs, and maybe the 1" tcase drop kit, that helped me but my 3.5 actually raised mine 5".

 

S

Scott Williams

NAXJA Forum User

Location

Wilmington, NC

• Jul 7, 2004

• #4

Mike,
Common problem for lots... do a search. Lots of fixes available... TC drop is the quickest and easiest.

 

Yucca-Man

NAXJA Member # 683

Location

Castle Rock, CO

• Jul 7, 2004

• #5

T-case drop might work; it could be spring wrap though. Was it ONLY an add-a-leaf in the rear? Since the vibes sound like they are only on accel/decel it might not be the slip-yoke, but that could be in the near future anyway.

 

M

Mike Mettlach

NAXJA Forum User

Location

colorado

• Jul 7, 2004

• #6

If I'm thinking about this correctly, a TC drop decreases drive shaft angle and shims increase drive shaft angle, right?

The differential does not move when the TC drops so, angle decreases. Shimming moves the axle down while the TC is stationary therefore increasing angle, right?

If this is correct, which way would I have to go?

Thanks in advance.


MJM

 

Yucca-Man

NAXJA Member # 683

Location

Castle Rock, CO

• Jul 7, 2004

• #7

Mike - take a look at the diagrams and conversation going on in http://www.naxja.org/forum/showthread.php?t=29586 - it's a similar issue to what you could be experiencin. Measurements of driveshaft angle are all relative to something, and without that there's really no telling whether it increases or decreases

 

BrettM

NAXJA Forum User

Location

michifornia

• Jul 7, 2004

• #8

make sure your pinion is pointed parallel to your TC output. if you still get vibes you can do a TC drop and again make sure they're pointing parallel. OR you can just do it the right way now and get an SYE and driveshaft. The RE hack-n-tap is only $90 and an XJ front shaft can be made to work in the rear.