Lots of wheel shake when braking - with NEW tension rod poly bushes!

[imalabil]

Welll, kinda new. They were put in earlier this year to quell the nasty wheel shake when braking once and for all - the big purple ones. BUT - I just got a new set of tires and there was a vibration at 70 mph on up. They were balanced three times and I was about to pay for a road force balance until I hit the brakes at about 80 and a subtle shake turned into a lot of shake until I "pressed through" the pulsation, as is typical for my X. This is the way it behaved before the bushing change.

Soooo - what else should I pry/prod/poke in the front end? I'm assuming something else is worn or this wouldn't be happening. I can't believe there would be any failure of the big, beefy poly bushing after only a few thousand miles, and they look the same as when they were installed, no cuts or rips.

Any suggestions would be hugely welcome.

BTW, I put on Fuzion Touring tires in 255/55 - 18.