I bought a camber/caster gauge for about $400 and measured the wheel alignment on my 2007 ZR6. After going to Toyota for 3 wheel alignment within 1 yr and they did not fix the problem. FRONT (old setting) LEFT RIGHT Caster = +3.50 DEG Caster = +3.50 DEG Camber = -1.50 DEG Camber = -1.50 DEG Did not measure toe REAR LEFT RIGHT Camber = -2.00 DEG Camber = -2.00 DEG Did not measure toe. The measurement I took was good if the car was travelling on a dead flat road then the car will not pull to either side. However the roads in Australia are sloped down to the left to allow rain to drain. It’s this slop (road camber) that causes the aurion to pull to the left. To compensate for the slop of the road, you can adjust camber using camber bolts or caster using the part from Fulcrum as mention by other in this forum (both of these methods have been implemented since the invention of independent suspension). I decided to use 17mm camber bolts as it was easy to install (bolts cost me $110) to reduce the camber on the front right by 0.50 DEG. FRONT (new setting) LEFT RIGHT Caster = +3.50 DEG Caster = +3.50 DEG Camber = -1.50 DEG Camber = -1.00 DEG Did not measure toe (left as factory spec) range should be within -0.10 to -0.250 DEG. REAR (the same as old) Since there is more negative camber on the left it pushed the car up the slop of the road counteracting the pull to the left resulting in the car travelling straight. Using offset bushing to offset caster your wheel alignment spec will be: FRONT (new setting) LEFT RIGHT Caster = +4.00 DEG Caster = +3.00 DEG Camber = -1.50 DEG Camber = -1.50 DEG Since there is positive caster on the left it pushed the car up the slop of the road counteracting the pull to the left resulting in the car travelling straight. Caster adjustment require a toe adjustment when finish, while camber does not. Now, why Toyota did not do this in the first place I will never know. Since the aurion is sold worldwide (badge as Camry V6 in the US) the setting I have used on my car will not work as they drive on the wrong, oops I mean on the right side of the road will cause the car to pull to the right and since the road is sloped to the right. Right hand drive cars need adjustment to compensate a left slop in the road and a left hand drive car need adjustment to compensate for a right slop in the road. Toyota must have seen that it was cheaper to design one car for the world use rather then a left hand model and a right hand model. It also up to the wheel alignment technician, a skilled person will know how to adjust the car right. Even a Toyota technician can be a bad one. HOPE THIS WILL HELP - I HAVE FIXED MY CAR PULL ISSUE AND IM GETTING 9.6L/100km FUEL ECONOMY. BEFORE THE FIX I WAS USING 11L/100km. CITY FREEWAY COMBINED
