Since I moved house the drive way I have I need to reverse on to the road with full right hand lock. I've noticed a shudder which of feel through the steering.
Is this normal with Rx8 or a problem

 

Is you 8 lowered, maybe your rubbing now at full lock.

 

No its a standard set . Car drives good and no problem with normal steering only when reversing on full lock.

 

had the same issue when i first purchased my 8. Needed differential fluid replaced. Mazda also added the "Ford Friction Modifier" to the differential, but many here will tell you that it is unnecessary with a torsen diff.