HibachiZ28

iTrader: (5)

I purchased a set of TT2's. Since I installed them I've had a vibration typically from 60-70, then it gets quite a bit worse above 75. The whole car shakes whether I am on or off the gas.

I've also noticed a clicking sound while driving, mainly above 25 MPH and while next to a highway median.

I'm assuming this is a driveshaft u-joint as well as a balance issue with the wheels? I've had the front wheels rebalanced after adding new tires. The rears are down to the wear marks so I'll be getting new tires soon & having them balanced.

Any other ideas or things to look at? Thanks....

metalmechanic

id def try new tires first

HibachiZ28

iTrader: (5)

Yah that's #1 on the list. Just need to find a good used set of 315/35R17's

gmdoctor

iTrader: (3)

make sure the wheels are hub-centric, other than that i'd change out the 2 worn tires and have the wheels road force balanced to make sure everything is straight.

leadfoot4

iTrader: (1)

While I'd be looking at the tires as the primary cause for vibration, you DID remember to remove the "tinnerman nuts" from the wheel studs, before mounting the wheels, right?

TruBloodTransAm

iTrader: (24)

Whats that?

leadfoot4

iTrader: (1)

"Tinnerman nuts" are those funky looking clips that are found on 2-3 lugs studs. They're an assembly line deal, to hold drums/rotors in place while the car is going down the assembly line, before the wheels are installed.

OE wheels have a recess to accomodate them, but many aftermarket wheels do not, therefore it's possible to have aftermarket wheels not sit flush on the hubs, which can cause a wobble.

TruBloodTransAm

iTrader: (24)

Thanks, always good to know.

I did a search on google images to see what they look like. I came across this thread.

Tx91z28

start with the easy stuff, make sure all of your lugs are tight