A method for calibrating a variator trim system (300, 400, 510, 512) configured to control application of a variator of a transmission (14, 1512), the method comprising: determining at least one electrical input value for the variator trim system, each of the at least one electrical input values corresponding to a reference output pressure value associated with the variator trim system, wherein the reference output pressure value comprises a calibration pressure that is greater than an exhaust backfill pressure and less than a pressure that applies the variator; determining at least one offset based on the at least one electrical input value; calibrating the variator trim system based on the at least one electrical input value; using the offset to calibrate the variator trim system, wherein using the offset comprises selectively applying a proportional offset to at least one reference electrical input value that is related to a portion of an operating range between the reference output pressure value and a second reference output pressure value associated with the variator trim system; and determining a first electrical input value associated with a first phase of operation of the variator and a second electrical input value associated with a second phase of operation of the variator different from the first phase of operation, and calibrating the variator trim system based on the first and second electrical input values; wherein the variator comprises a toroidal variator coupled to the variator trim system; and wherein the first electrical input value associated with the first phase of operation corresponds to a first reference output pressure value and the second electrical input value associated with the second phase of operation corresponds to a second reference output pressure value, wherein the first reference output pressure value is greater than the second reference output pressure value, and wherein the first reference output pressure value is less than the pressure that applies the variator. determining at least one electrical input value for the variator trim system, each of the at least one electrical input values corresponding to a reference output pressure value associated with the variator trim system, wherein the reference output pressure value comprises a calibration pressure that is greater than an exhaust backfill pressure and less than a pressure that applies the variator; determining at least one offset based on the at least one electrical input value; calibrating the variator trim system based on the at least one electrical input value; using the offset to calibrate the variator trim system, wherein using the offset comprises selectively applying a proportional offset to at least one reference electrical input value that is related to a portion of an operating range between the reference output pressure value and a second reference output pressure value associated with the variator trim system; and determining a first electrical input value associated with a first phase of operation of the variator and a second electrical input value associated with a second phase of operation of the variator different from the first phase of operation, and calibrating the variator trim system based on the first and second electrical input values; wherein the variator comprises a toroidal variator coupled to the variator trim system; and wherein the first electrical input value associated with the first phase of operation corresponds to a first reference output pressure value and the second electrical input value associated with the second phase of operation corresponds to a second reference output pressure value, wherein the first reference output pressure value is greater than the second reference output pressure value, and wherein the first reference output pressure value is less than the pressure that applies the variator.