[Crazzz4tj]

I have a 01 wrangler with a zone 4.25" lift with the 1" motor mount lift and still have a vibration how do you determine how much to drop your transfer case. Thanks

 

[Water Dog]

When does your vibe show up? Is it on take off, or as you get faster? If it's just on take off, check the condition of your transmission mount. If it is at higher speeds, try dropping the t-case by a couple of washers.

 

[BM3]

Also did you do an alignment after the lift was installed?

 

[Crazzz4tj]

It shows up at higher speed I put 1 washer in already. So do you think I should add 1 more? And yes I have done a alignment

 

[Water Dog]

It shows up at higher speed I put 1 washer in already. So do you think I should add 1 more? And yes I have done a alignment

Make sure your u-joints are good, and if so add a couple more washers.

 

[Dextreme]

I have two washers on each bolt on mine. This pic probably has 3 washers.

 

[BM3]

It shows up at higher speed I put 1 washer in already. So do you think I should add 1 more? And yes I have done a alignment

The only vibes I had with mine were a incorrect toe-in, and wheel balance

 

[Jerry Bransford]

What may be easier is just to add enough washers so you get 1/2" of t-case drop which should get rid of any remaining vibes. If you have the energy later, you may remove a washer or two to see if you can get rid of some of the drop without causing the vibes to return.

Whether or not a 1" motor mount lift, t-case drops, etc. get rid of vibes entirely depends on what rear axle you have, what transmission, etc. you have since all of those affect the driveshaft length. The shorter the rear driveshaft, the more susceptible it is to vibrations.