A tie rod assembly for a mid-turbine frame of a gas turbine engine comprising: at least one tie rod for connecting an outer frame case to an inner frame case , wherein the at least one tie rod includes an inlet passage branching between a first branch within the tie rod extending coaxially and radially inward, when installed in the mid-turbine frame, and a second branch within the tie rod extending in an axially downstream direction, when installed in the mid-turbine frame, and characterized by the second branch being in fluid communication with a low-rotor cavity through to a fitting that extends through the inner frame case and connects to a swirler tube , the fitting including a transfer tube and a cup boss , wherein the transfer tube is pressed, welded, or brazed into an opening in the hollow spoke , the cup boss is configured to be fastened to the inner frame case with fasteners and aligned with a hole in the inner frame case , wherein the fasteners are also configured to secure the swirler tube to an opposite side of the inner frame case from the cup boss , the swirler tube configured to direct a cooling airflow into the low-rotor cavity in the direction of rotation of the low-rotor to reduce turning and aerodynamic losses in the cooling airflow, wherein a restricting ring is located within the second branch or between the swirler tube and an inner diameter surface of the inner frame case , wherein the restricting ring includes a diameter (D3) which is smaller than a diameter (D4) of the second branch ; and a plug located in the first branch to block flow through a portion of the first branch , the plug including a flange on a proximal end and a radially outer distal end located in the first branch , the flange being accepted within an opening in the tie rod adjacent an outer diameter surface of the inner frame case . at least one tie rod for connecting an outer frame case to an inner frame case , wherein the at least one tie rod includes an inlet passage branching between a first branch within the tie rod extending coaxially and radially inward, when installed in the mid-turbine frame, and a second branch within the tie rod extending in an axially downstream direction, when installed in the mid-turbine frame, and characterized by the second branch being in fluid communication with a low-rotor cavity through to a fitting that extends through the inner frame case and connects to a swirler tube , the fitting including a transfer tube and a cup boss , wherein the transfer tube is pressed, welded, or brazed into an opening in the hollow spoke , the cup boss is configured to be fastened to the inner frame case with fasteners and aligned with a hole in the inner frame case , wherein the fasteners are also configured to secure the swirler tube to an opposite side of the inner frame case from the cup boss , the swirler tube configured to direct a cooling airflow into the low-rotor cavity in the direction of rotation of the low-rotor to reduce turning and aerodynamic losses in the cooling airflow, wherein a restricting ring is located within the second branch or between the swirler tube and an inner diameter surface of the inner frame case , wherein the restricting ring includes a diameter (D3) which is smaller than a diameter (D4) of the second branch ; and a plug located in the first branch to block flow through a portion of the first branch , the plug including a flange on a proximal end and a radially outer distal end located in the first branch , the flange being accepted within an opening in the tie rod adjacent an outer diameter surface of the inner frame case . <EOS>