violent knock, vibration

[nikmay]

Hi all, I am getting a real violent vibration come knock from the front end when I take my foot off the go pedal at about 80mph, it stops as soon as i put my foot on the brakes, thought at first I was losing a bleeding wheel, but thankfully I wasn't, just recently fitted new top mounts which were knackered, but symptoms still remain any ideas?

[nikmay]

Nobody got any ideas??

[Knight Rider S4]

I would check:

Link arms off the ARB
ARB bushes
Make sure calipers are tight and not loose
Swing arm bushes for play

Hopefully it is one of the above


Cheers

Steve

[Acidburn]

have you checked as many of the nuts/bolts as possible at the front end i.e.

wishbone
upright
suspension to steering arm bolts
the 2x bolts that hold both steering arms to the steering rack
wishbones

I had something like this except mine was around 100 ish and I found the wishbone nuts/bolts had worked slightly loose.

[s2_bo]

Also worth checking the subframe bolts as i had a similar problem after i had a 'garage' refit my subframe and they only did the bolts up hand tight.