Do you have more than 32psi in your tires?
If you have aftermarket wheels or wheel spacers, did you remove the lug retainer clips?
Speed dependent wobbles are nearly always tire/wheel related--out of balance, bent wheels, failure to torque non-hubcentric wheels in a star pattern, a bad tire, etc.
You absolutely must get longer front swaybar links if you ever use the electronic Rubi swaybar disconnect. With longer rear shocks, you absolutely must either use rear brakeline drop brackets or run longer rear brakelines.
hey mate thanks for this.
i just noticed it because i came back on to say i fixed the problem. went through planmans guide and just tightened everything. no good everything was pretty tight. thought i don't think its a wheel inbalance because i would expect that to be there at all speeds but hell ill rotate fronts to rear anyway. and BAM fixed! so needless to say i still have an out of balance tyre onthe back i need to get balanced but im glad its not loose bolts. so well done for the correct diagnosis mate!
also as an addition, i forgot to mention with my lift kit i bought the teraflex 2.5" spring lift kit, swapped out the springs for rockkrawler springs and shocks for bilsteins.
so my front swaybar links are the factory rear ones and i have brake like relaocation brackets from the tf kit.
the only reason i dont have a rear trackbar bracket is because they sent me one for a LHD not RHD so it's currently in transit.
thanks for your help guys greatly appreciated.
on another sidenote, do you guys loctite (threadlock) your suspension bolts? i noticed they're not from factory but im thinking of redoing them all with threadlock to try and prevent any premature loosening.