Does anyone know if a rear rotor can warp bad enough to make the tire wobble? I am going to swap the rotors from each side to test tonight. They are Ls1 brakes on a 4th gen rear.

 

No, they will not cause tire wobble

 

Try swapping the wheels from side to side.

JamesC

 

Found it the hard way. swapped wheels still on pass side, swapped rotors same swapped axles it followed. bent axle sucks.

 

I had this same problem, but it was not a bent axle, the rotor was just not sitting down all the way flush on the axle flange, so whichever lug was tightened first put a wobble in the wheel mounting. You can put a dial indicator on the outside of the flange while still in the axle housing and measure any runout, but mine were excellent.

Measure the lug bolts very carefully, and subtract the thickness of the rotor where it connects to the flange. If when you put the rotor on, it does not come out enough to allow for ONLY the thickness of the rotor, your rotor is not sitting all the way down onto the flange.

I just took a mini-grinder to the outside diameter of my axle, allowing the rotor to sit flush on the flange and all the wobbling problems disappeared.