Vibes around 65 mph and vibes. Action needed?

Big_Al said:

How about some details? What year? How much lift? Check pinion angle? Drop transfer case? I'm sure you'll get some good advise if we know what you've done..... Al

Click to expand...

Hubbazoot said:

The slip yoke doesn't appear to be too far extended, only about a 1/2" beyond where it was at stock height, but I'm getting vibes around 65mph that get louder as speed increases. I know there's a million of these types of threads, but I want to hear what everyone has to say.

Click to expand...

Seiler said:

This is a link to a very information article that might help you understand how this stuff works a little better:

http://www.4x4wire.com/tech/pinionangle/

Another:

http://www.4xshaft.com/driveline101.html

Both links should answer some of your questions.

Do you have a SYE and/or a transfer-case drop kit?

Scott

Click to expand...

89xj said:

wow, every jeep must be different. an 87 with a 5speed should be able to handle a 3" lift without issues. im at 4.5" on my 89 with 5spd with no vibs by using shims, 3" leeaves, and shackles.

is this a newly installed lift? new springs, budget boost????
how old are the driveshaft ujoints?
did you get an alignment and tire balance.

Click to expand...

Hubbazoot said:

I have an SYE sitting in the back of my XJ. I was hoping I could avoid putting it on.



I don't have any shims in mine, may be the issue. I have some BP leaves, but the rest is RC's 3.5" lift kit: full shocks and coils, lca's, and an adj. track bar.

Click to expand...

89xj said:

are you sure the vibs are coming from the rear? have you checked the rear driveshaft ujoints? have you pulled the front shaft and gone for a ride?

what are, BP leaves?

Click to expand...