rough 'chattering' on freeway after shock swap, help!

[jarbroen]

I installed 5100's all around this weekend - no other change.
The suspension felt great around town, big improvement over stock. It even felt great on the highway going 60 for a while.

After hopping on the freeway for a few minutes there's a harsh chattering when going 50-60mph or so. Doesn't happen on really smooth surfaces but very noticeable on the rough surfaces. Almost feels like high speed, small washboard.

I torqued everything to spec with a torque wrench. Except the top shock bolt since I couldn't get the wrench in there. I tightened those nuts until they 'stopped' and guesstimated the 18ftlbs. Years back I busted a shock by overtightening so I'm very cautious now.

There's a possiblity one or more of those is causing the chattering.
Any other possibilities I should check out?

Or does the 5100 just react differently to crappy road surfaces?

Thanks!

 

[Stifler]

Except the top shock bolt since I couldn't get the wrench in there.

I think you answered your own question....

 

[jarbroen]

Phew, I figured it out. Fortunately, before my wife had to drive another 10 miles on the freeway.
I ran through a mental check of the install steps. I realized I didn't fully torque the back wheel lug nuts after install. My dad showed up right at that time and I lost track.
Just glad I caught it before something bad happened.

 

[Stifler]

Doh!