Fishtailing

[noJeepshere]

I have an issue that is getting worse, and I'm stumped (as are my friends) as to what the issue is. My Yukon fishtails over bumps on the highway, really bad. And it only exhibits itself at higher speeds (60 and above) in a straight line. In a turn it won't fishtail at all, and its only on the bigger bumps that gets the whole suspension moving.

Anyone have any idea what this might be? It's disconcerting and I've tried to ignore it because I'm doing a sas soon but it won't have that, I must pay attention to it and put a little money in a wore out turd before I scrap it.

cent frum a smaert fone

 

[ccapehartusarmyINF.(ret)]

does your suspension feel exceptionally bouncy

---------- Post added at 12:23 PM ---------- Previous post was at 12:22 PM ----------

go to your vehicle and push down ******* the front and after you let go does your suspension continue to rebound if it does your shocks are probably taost

 

[noJeepshere]

Suspension does not bounce at all. I can get my full 280 lbs bouncing that thing like crazy on the bumper and one rebound is all it will do.

All the shocks are tight with no leaks, all bushings and nuts and bolts are tight, no play in any of the steering components, balljoints are tight, nothing seems wrong, other than maybe some play in the steering box. A detailed inspection by a shop revealed nothing even with a micrometer. It's a mystery.

cent frum a smaert fone

 

[ccapehartusarmyINF.(ret)]

hows yer alignment

 

[livingez_123]

I would check your rear suspension bushings paying close attention to your panhard bar.

 

[ccapehartusarmyINF.(ret)]

question whats a panhard bar ?

 

[Big Buttons]

question whats a panhard bar ?

Keeps your rear axle centered under your vehicle. Goes from the body on the right down to the left part of your axle.

 

[noJeepshere]

Keeps your rear axle centered under your vehicle. Goes from the body on the right down to the left part of your axle.

If only an old body style Yukon had a panhard bar. This is a 99.

cent frum a smaert fone

 

[livingez_123]

leaf springs? if so, check your spring bushings.

 

[sbubbaklein]

take a look at the toe in on the front alignment. you don't mention if 2wd or 4wd. make sure the toe doesn't change significantly with suspension compressed. Could have something bent in steering linkage.