i also have a vectra c 1.8 club 2004 steeing shakes @ 60-65
but i have changed the following parts
link bars front discs front pads t/ rod ends then had it retracked but still no better and now it draggs to left worse than it did i think its time for it to go and get another frontera
REGARDS DARREN
VAUXHALL FRONTERA 2.2 LIMITED LWB NOV 2000 ( X ) Y22SE
Modifications: WIND DEFLECTORS FRONT TOW BAR NUDGE BAR CRUISE LIGHTS UPRATED CLUTCH 4 NEW COOPER DISCOVERER TYRES IRMISCHER DASH PANEL , & GEAR KNOBS TINTED WINDOWS H.I.D HEADLIGHT KIT 8000K
Might be worth getting the front wheels re balanced Could also be a bent wheel as this happened to me years ago. If you get the wheels balanced the machine will tell you if there bent or not