A subsea well connector for connecting a tubular member to a subsea wellhead assembly , comprising: a tieback connector having a stationary connector body and a moveable connector body , the stationary connector body and the moveable connector body being annular members and the stationary connector body circumscribing a portion of the moveable connector body ; a tie rod extending in an axial direction from the stationary connector body , the tie rod having a tie rod profile comprising a plurality of axially spaced apart tie rod grooves on a tie rod outer diameter; at least one dog ring mounted to the movable connector body, the dog ring having an inner diameter profile circumscribing the tie rod , the dog ring being moveable between a lockdown open position where the inner diameter profile of the dog ring is spaced radially outward from the tie rod grooves, and a lockdown engaged position where the inner diameter profile engages the tie rod profile , to axially couple the stationary connector body and the moveable connector body , wherein the tie rod profile extends an axial height along the rod that is greater than an axial height of the inner diameter profile such that, in the lockdown engaged position, the inner diameter profile is operable to engage different ones of the tie rod grooves of the tie rod profile at a plurality of axial locations along the tie rod profile; an annular piston circumscribing the dog ring , the annular piston having a region with a reduced inner diameter that engages a dog ring outer diameter of the dog ring to retain the dog ring in the lockdown engaged position; and a cylinder that circumscribes the annular piston , defining a lockdown piston cavity . a tieback connector having a stationary connector body and a moveable connector body , the stationary connector body and the moveable connector body being annular members and the stationary connector body circumscribing a portion of the moveable connector body ; a tie rod extending in an axial direction from the stationary connector body , the tie rod having a tie rod profile comprising a plurality of axially spaced apart tie rod grooves on a tie rod outer diameter; at least one dog ring mounted to the movable connector body, the dog ring having an inner diameter profile circumscribing the tie rod , the dog ring being moveable between a lockdown open position where the inner diameter profile of the dog ring is spaced radially outward from the tie rod grooves, and a lockdown engaged position where the inner diameter profile engages the tie rod profile , to axially couple the stationary connector body and the moveable connector body , wherein the tie rod profile extends an axial height along the rod that is greater than an axial height of the inner diameter profile such that, in the lockdown engaged position, the inner diameter profile is operable to engage different ones of the tie rod grooves of the tie rod profile at a plurality of axial locations along the tie rod profile; an annular piston circumscribing the dog ring , the annular piston having a region with a reduced inner diameter that engages a dog ring outer diameter of the dog ring to retain the dog ring in the lockdown engaged position; and a cylinder that circumscribes the annular piston , defining a lockdown piston cavity . <EOS>