Few dayz ago I took my Z for a spin and for the first time ever I noticed that on the 5th gear somewhere around 5000RPMs [not below] shift **** is getting really wobbly, after up shifting to 6th gear it was fine…
I tried it again to check if that 5th gear has this issue all the time
and I noticed same thing so looks like it does.
Is this something I should have checked???? My car is around 3k miles old now

 

I have the same problem, but it depends on how wobbly you're talking about. Mine vibrates pretty much anytime after 5500+. Just by looking at it you can't tell it's moving, but it's surely vibrating. hehe that didn't sound good

 

does everbodys viberate when sitting at idol?

 

Yeah it does a little bit. I think its normal for high performance vehicles. I've never owned a sports car before so I'm not 100% sure.

 

Vibrates a lot compared to other cars.

 

Noticed the same in fifth, seems likes it vibrates more as the car slows, starts to shake. I only notice this in fifth as the car slows toward 4500, feels loose.