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A method of controlling a machine transmission includes determining a first target torque of the transmission. The first target torque includes a combination of a torque limit associated with a power source of the machine and a virtual retarding torque. The method also includes directing the transmi

A method of controlling a machine transmission includes determining a first target torque of the transmission. The first target torque includes a combination of a torque limit associated with a power source of the machine and a virtual retarding torque. The method also includes directing the transmission to generate a first output corresponding to the first target torque. The first output of the transmission increases a speed of the power source from a first power source speed to a second power source speed and decreases a travel speed of the machine from a first travel speed to a second travel speed. The method further includes determining that the first target torque is not equal to the torque limit, and determining a second target torque of the transmission in response. The second target torque is less than the first target torque.

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1. A method of controlling a transmission associated with a machine, comprising: determining a first target torque of the transmission, wherein the first target torque comprises a combination of a torque limit associated with a power source of the machine and a virtual retarding torque;directing the

1. A method of controlling a transmission associated with a machine, comprising: determining a first target torque of the transmission, wherein the first target torque comprises a combination of a torque limit associated with a power source of the machine and a virtual retarding torque;directing the transmission to generate a first output corresponding to the first target torque at an interface between the transmission and the power source, wherein the first output of the transmission increases a speed of the power source from a first power source speed to a second power source speed and decreases a travel speed of the machine from a first travel speed to a second travel speed;determining that the first target torque is not equal to the torque limit; anddetermining a second target torque of the transmission in response to determining that the first target torque is not equal to the torque limit, wherein the second target torque is less than the first target torque. 2. The method of claim 1, wherein the virtual retarding torque is determined based on a difference between the first power source speed and a power source speed threshold. 3. The method of claim 1, wherein the virtual retarding torque decreases as a torque of the power source decreases. 4. The method of claim 1, wherein the virtual retarding torque decreases as a difference between power source speed and a power source speed threshold decreases. 5. The method of claim 1, wherein the torque limit comprises a combination of a power source torque threshold and at least one additional torque threshold associated with a parasitic load receiving power from the power source. 6. The method of claim 1, further including determining the first target torque in response to a signal indicative of a desired change in machine travel direction. 7. The method of claim 1, further including determining the first target torque in response to a determination that a grade of a surface on which the machine is located exceeds a grade threshold. 8. The method of claim 1, further including activating a parasitic load associated with the power source in response to determining that the first target torque is not equal to the torque limit. 9. The method of claim 1, further including directing the transmission to generate a second output corresponding to the second target torque at the interface between the transmission and the power source, wherein the second output of the transmission increases the speed of the power source from the second power source speed to a third power source speed greater than the second power source speed, and decreases the travel speed of the machine from the second travel speed to a third travel speed less than the second travel speed. 10. The method of claim 1, further including sequentially determining at least one additional target torque of the transmission until a first of the additional target torques is equal to the torque limit. 11. The method of claim 1, further including determining that the second target torque is equal to the torque limit; increasing the speed of the power source to a power source speed threshold; andincreasing a torque demanded by a parasitic load receiving power from the power source to a parasitic load torque threshold, wherein the speed of the power source and the torque demanded by the parasitic load are increased in response to determining that the second target torque is equal to the torque limit. 12. A method of controlling a transmission associated with a machine, comprising: determining a first operating characteristic of a power source associated with the machine;determining a first target torque of the transmission based on the first operating characteristic, wherein the first target torque exceeds a power source torque threshold by an amount greater than or equal to a virtual retarding torque associated with the first target torque; anddetermining at least one additional target torque of the transmission, in a closed-loop manner, until a virtual retarding torque associated with the at least one additional target torque is equal to about zero. 13. The method of claim 12, further including determining the at least one additional target torque of the transmission until a first of the additional target torques is equal to a torque limit associated with the power source, wherein the torque limit has a magnitude greater than the power source torque threshold. 14. The method of claim 13, wherein the torque limit comprises a combination of the power source torque threshold and an additional torque threshold associated with a parasitic load receiving power from the power source. 15. The method of claim 12, wherein the virtual retarding torque is based on a difference between power source speed and a power source speed threshold. 16. The method of claim 12, wherein the first operating characteristic comprises at least one of a power source speed, a power source load, and a power source torque. 17. The method of claim 12, wherein the first target torque exceeds the power source torque threshold by an amount equal to a combination of the virtual retarding torque associated with the first target torque and at least one additional torque threshold associated with a parasitic load receiving power from the power source. 18. A transmission control system, comprising: a power source including a driven member;a transmission including a drive member operably connected to the driven member;a parasitic load receiving power from at least one of the transmission and the power source; anda control system in communication with the power source, the transmission, and the parasitic load, wherein the control system is operable to determine a target torque of the transmission, in a closed-loop manner, based on a torque limit associated with the power source and a virtual retarding torque, anddirect the transmission to provide an output to the power source via the drive member corresponding to each respective target torque, wherein the torque limit comprises a combination of a power source torque threshold and an additional torque threshold associated with the parasitic load, and wherein the virtual retarding torque is based on a difference between power source speed and a power source speed threshold. 19. The system of claim 18, wherein the parasitic load comprises at least one of a power source fan and an implement pump operably connected to the power source. 20. The system of claim 18, wherein the power source comprises a diesel engine, and the transmission comprises one of an electric continuously variable transmission and a hydraulic continuously variable transmission, the system further including at least one sensor configured to determine an operating characteristic of the diesel engine and to direct a signal indicative of the operating characteristic to the control system.