Vibration Problem

[opie74]

I really appreciate this advice! I am going to take measurement soon but I believe the front is sitting higher than the rear and it looks slightly visibly noticable. I am going to do the cheapest things possible first. Tires are only 2 months old, lift is 2 weeks old now. I am going to take the front suspension off this weekend and drop the perch down 1 on my bilstein 1500's they are both sitting on the middle perch and the front end looks slightly higher than the rear. I beleive this may help. The brand new CV axles plus the diff drop have actually helped a little bit with vibration. i'm able to get all the way up to about 65 MPH now without much vibration and even after that, it's not terrible but I do need to clear this up. Tires are 275/70/16 BTW. If after dropping the front slightly doesn't work, I'm going to purchase a Pan hard drop, then adjustable rear upper and lower control arms, and then go from there.

If you have already gotten an alignment, you will need to again if you drop the front suspension down a bit. Changing the resting point of the front suspension effects every angle in it. Castor, camber and toe.

Save your money on the panhard drop, IMO. You also really only need adjustable uppers or lowers, not both. I chose uppers to keep my investment more protected. There is plenty of adjustment to rotate the axle in one or the other.

Nice to hear some of your vibrations have ceased. Check for play in the drive shaft ujoint, double cardan and the slip joint.

 

[hurriedcoyote]

Engage 4H

I also have the same vibration at 50 and above. After the install of toytec TTHA-9602 3" lift with diff drop. New CV's to no avail. Had read in another forum about it possibly being the front diff bearings. Suggested engaging 4H and see if vibration stops. I tried it sure enough it was all but gone. Didn't like taking it to those speeds but the road was wet so I did anyway. I would like to know if that is a reasonable assumption before I tear into the front diff though.