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A vehicle is configured to perform shuttle-shifting and comprises an engine and a power shift transmission operably connected with the engine comprising forward and reverse mechanical gears, the power shift transmission having more forward mechanical gears than reverse mechanical gears. The vehicle

A vehicle is configured to perform shuttle-shifting and comprises an engine and a power shift transmission operably connected with the engine comprising forward and reverse mechanical gears, the power shift transmission having more forward mechanical gears than reverse mechanical gears. The vehicle comprises a processor operably connected to the power shift transmission and to the engine, and is configured to receive a command from a user to establish a relationship between a last forward gear used and a desired reverse performance. The processor is configured to determine a desired reverse ratio based upon the last forward gear used and the established relationship and to select a reverse mechanical gear having a reverse gear ratio which is the same or less than the desired reverse ratio. The processor is configured to control the power shift transmission to shift to the selected reverse mechanical gear and if the reverse gear ratio of the selected reverse mechanical gear is less than the desired reverse ratio, an RPM of the engine is controlled to compensate for a difference between the reverse gear ratio of the selected reverse mechanical gear and the desired reverse ratio.

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1. A vehicle configured to perform shuttle-shifting, comprising: an engine;a power shift transmission operably connected with the engine comprising forward and reverse mechanical gears, the power shift transmission having more forward mechanical gears than reverse mechanical gears; anda processor op

1. A vehicle configured to perform shuttle-shifting, comprising: an engine;a power shift transmission operably connected with the engine comprising forward and reverse mechanical gears, the power shift transmission having more forward mechanical gears than reverse mechanical gears; anda processor operably connected to the power shift transmission and to the engine, the processor being configured to:receive a command from a user to establish a relationship between a last forward gear used and a desired reverse performance,determine a desired reverse gear ratio based upon the last forward gear used and the established relationship,identify a first predetermined reverse gear ratio associated with a first reverse mechanical gear, wherein the first predetermined reverse gear ratio is the same as or less than the desired reverse gear ratio;identify a second predetermined reverse gear ratio associated with a second mechanical gear, wherein the second predetermined reverse gear ratio is greater than the desired reverse gear ratio;compare the first predetermined reverse gear ratio to the desired reverse gear ratio and the second predetermined reverse gear ratio to the desired reverse gear ratio;determine whether the second predetermined reverse gear ratio is closer than the first predetermined reverse gear ratio to the desired reverse gear ratio by a predetermined threshold;determine whether an engine rotation rate is sufficiently adjustable to compensate for a difference between the second predetermined reverse gear ratio and the desired reverse gear ratio;select the first predetermined reverse gear ratio while the second predetermined reverse gear ratio is not closer to the desired reverse gear ratio by the predetermined threshold or while the engine rotation rate is not sufficiently adjustable to compensate for the difference;control the power shift transmission to effectuate a shift to a reverse mechanical gear associated with the selected first predetermined reverse gear ratio, and if the selected first predetermined reverse gear ratio is less than the desired reverse gear ratio, control the engine rotation rate to compensate for a difference between the selected first predetermined reverse gear ratio and the desired reverse gear ratio. 2. The vehicle according to claim 1, wherein if the established relationship is that the desired reverse performance is the same as that of the last forward gear used, then the desired reverse gear ratio will be determined to be the same as a ratio of the last forward gear used, and if the established relationship is such that the desired reverse performance is different from that of the last forward gear used, then the desired reverse gear ratio will be determined as different from the gear ratio of the last forward gear used. 3. The vehicle according to claim 1, wherein the processor is configured to set a reverse gear ratio index to a first number, wherein the first number corresponds to the first predetermined reverse gear ratio. 4. The vehicle according to claim 3, wherein lower numbers for the reverse gear ratio index correspond to higher reverse ratios. 5. The vehicle according to claim 3, wherein the processor is configured to set the reduced gear ratio index to a second number having one unit less than the first number and corresponding to the second predetermined gear ratio. 6. The vehicle according to claim 1, wherein the processor is further configured to adjust the engine rotation rate based on an engine rotation rate corresponding to an engine speed request from an operator, the ratio of the selected reverse mechanical gear, and the desired reverse ratio. 7. The vehicle according to claim 1, wherein the processor is configured to: select the second predetermined reverse gear ratio while the second predetermined reverse gear ratio is closer to the desired reverse gear ratio by the predetermined threshold and the engine rotation rate is sufficiently adjustable to compensate for the difference; andcontrol the power shift transmission to effectuate a shift to a second reverse mechanical gear associated with the selected second predetermined reverse gear ratio and control the engine rotation rate to compensate for the difference between the selected second predetermined reverse gear ratio and the desired reverse gear ratio. 8. The vehicle according to claim 1, wherein the predetermined threshold is 10 percent. 9. A method for performing shuttle-shifting in a vehicle, including: providing a power shift transmission operably connected to an engine, the power shift transmission including forward and reverse mechanical gears, the power shift transmission having more forward mechanical gears than reverse mechanical gears, the method comprising using a processor to perform the steps of:establishing a relationship between a last forward gear used and a desired reverse performance,determining a desired reverse gear ratio based upon the last forward gear used and the established relationship,identifying a first reverse mechanical gear having a first predetermined reverse gear ratio which is the same or less than the desired reverse gear ratio;identifying a second reverse mechanical gear having a second predetermined reverse gear ratio which is greater than the desired reverse gear ratio;comparing the first predetermined reverse gear ratio to the desired reverse gear ratio and the second predetermined reverse gear ratio to the desired reverse gear ratio;determining whether the second predetermined reverse gear ratio is closer than the first predetermined reverse gear ratio to the desired reverse gear ratio by a predetermined threshold;determining whether an engine rotation rate is sufficiently adjustable to compensate for a difference between the second predetermined reverse gear ratio and the desired reverse gear ratio;selecting the first predetermined reverse gear ratio while the second predetermined reverse gear ratio is not closer to the desired reverse gear ratio by the predetermined threshold or while the engine rotation rate is not sufficiently adjustable to compensate for the difference; andcontrolling the power shift transmission to shift to a reverse mechanical gear associated with the selected first reverse gear ratio, and if the selected first predetermined reverse gear ratio is less than the desired reverse gear ratio, controlling the engine rotation rate to compensate for a difference between the selected first predetermined reverse gear ratio and the desired reverse gear ratio. 10. The method according to claim 9, wherein if the established relationship is that the desired reverse performance is the same as that of the last forward gear used, then the desired reverse gear ratio is determined to be the same as a ratio of the last forward gear used, and if the established relationship is that the desired reverse performance is different from that of the last forward gear used, then the desired reverse gear ratio is determined to be different from the gear ratio of the last forward gear used. 11. The method according to claim 9, comprising setting a reverse gear ratio index to a first number, wherein the first number corresponds to the first predetermined gear ratio. 12. The method according to claim 11, wherein lower numbers for the reverse gear ratio index correspond to higher reverse ratios. 13. The method according to claim 11, comprising setting a reduced gear ratio index to a second number having one unit less than the first gear ratio index and corresponding to the second predetermined gear ratio. 14. The method according to claim 9, wherein controlling engine rotation rate to compensate for the difference between the first predetermined reverse gear ratio of the first selected reverse mechanical gear and the desired reverse ratio comprises controlling the engine rotation rate based on an engine rotation rate corresponding to an engine speed request from an operator, the ratio of the selected reverse mechanical gear, and the desired reverse ratio. 15. The method according to claim 9, comprising: selecting the second predetermined reverse gear ratio while the second predetermined reverse gear ratio is closer to the desired reverse gear ratio by the predetermined threshold and the engine rotation rate is sufficiently adjustable to compensate for the difference; andcontrolling the power shift transmission to shift to a second reverse mechanical gear associated with the selected second predetermined reverse gear ratio and controlling the engine rotation rate to compensate for the difference between the selected second predetermined reverse gear ratio and the desired reverse gear ratio. 16. The method according to claim 9, wherein the predetermined threshold is 10 percent. 17. A vehicle configured to perform shuttle-shifting, comprising: an engine;a power shift transmission operably connected with the engine comprising forward and reverse mechanical gears, the power shift transmission having more forward mechanical gears than reverse mechanical gears; anda processor operably connected to the power shift transmission and to the engine; whereinthe processor is configured to receive a command from a user to establish a relationship between a last forward gear used and a desired reverse performance, and the processor is configured to determine a desired reverse ratio based upon the last forward gear used and the established relationship, wherein if the established relationship is such that the desired reverse performance is the same as that of the last forward gear used, then the desired reverse ratio will be determined to be the same as a gear ratio of the last forward gear used, and if the established relationship is such that the desired reverse performance is different from that of last forward gear used, then the desired reverse ratio will be determined as different from the gear ratio of the last forward gear, andwherein the processor is configured to:a) set a reverse gear ratio index to a first number, the first number being a lowest number possible for the reverse gear ratio index, wherein the reverse gear index comprises consecutive numbers of increasing value and wherein each number corresponds to a predetermined reverse ratio and increasing numbers correspond to lower predetermined reverse ratios,b) identify the predetermined reverse ratio corresponding to the selected reverse gear ratio index number,c) compare the predetermined reverse ratio with the desired reverse ratio, wherein if the predetermined reverse ratio is the same or less than the desired reverse ratio, a reverse mechanical gear which corresponds to the first number is selected and the processor controls the power shift transmission to shift to the selected reverse mechanical gear,d) if the predetermined reverse ratio is higher than the desired reverse ratio, the reverse gear ratio index is incremented by increasing the first number such that the predetermined reverse ratio corresponds to a lower predetermined reverse ratio, and the identifying of a predetermined reverse ratio in b) above is repeated, and c) above is repeated,e) if the predetermined reverse ratio is higher than the desired reverse ratio, then d) is repeated, causing the reverse gear ratio index to increase and the corresponding predetermined reverse ratio to decrease until the predetermined reverse ratio is less than or equal to the desired reverse ratio or until the first number is a highest number possible, and wherein if the first number is a highest number possible or the predetermined reverse ratio is less than or equal to the desired reverse ratio, then a reverse mechanical gear which corresponds to the reverse gear ratio index is selected, andf) determine whether the ratio of the selected reverse mechanical gear is lower than the desired reverse ratio, and if the ratio of the selected reverse mechanical gear is lower than the desired reverse ratio, control an engine speed command to the engine based on an engine rotation rate corresponding to an engine speed request from an operator, the ratio of the selected reverse mechanical gear, and the desired reverse ratio. 18. The vehicle according to claim 17, wherein while the reverse gear ratio index is the highest number possible, the processor is configured to identify that the ratio of the selected reverse mechanical gear is higher than the desired reverse ratio and to control the engine speed command to the engine based on an engine rotation rate corresponding to an engine speed request from an operator, the gear ratio of the selected reverse mechanical gear, and the desired reverse ratio. 19. A method for performing shuttle-shifting in a vehicle, comprising: providing a power shift transmission operably connected with an engine and comprising forward and reverse mechanical gears, the power shift transmission having more forward mechanical gears than reverse mechanical gears;providing a reverse gear ratio index having consecutive numbers of increasing value wherein each number corresponds to a predetermined reverse ratio and increasing numbers correspond to lower predetermined reverse ratios;receiving, at a processor, a command from a user to establish a relationship between a last forward gear used and a desired reverse performance;determining, via the processor, a desired reverse ratio based upon the last forward gear used and the established relationship, wherein if the established relationship is such that the desired reverse performance is the same as the that of the last forward gear used, then the desired reverse ratio will be determined to be the same as a ratio of the last forward gear used, and if the established relationship is such that the desired reverse performance is different from that of the last forward gear used, then the desired reverse ratio will be determined as different from the ratio of the last forward gear used, the method further comprising using the processor to perform the steps of:a) setting a reverse gear ratio index to a first number, the first number being a lowest possible number for the reverse gear ratio index;b) identifying the predetermined reverse ratio corresponding to the reverse gear ratio index;c) comparing the predetermined reverse ratio with the desired reverse ratio, wherein if the predetermined reverse ratio is the same or less than the desired reverse ratio, a reverse mechanical gear which corresponds to the first number is selected and the power shift transmission shifts to the selected reverse mechanical gear;d) if the predetermined reverse ratio is higher than the desired reverse ratio, the reverse gear ratio index is incremented by increasing the first number such that the predetermined reverse ratio corresponds to a lower predetermined reverse ratio, the identifying of a predetermined reverse ratio in b) above is repeated, and c) above is repeated;e) if the predetermined reverse ratio is higher than the desired reverse ratio, then d) is repeated, causing the reverse gear ratio index to increase and the corresponding predetermined reverse ratio to decrease until the predetermined reverse ratio is less than or equal to the desired reverse ratio or until the first number is a highest number possible, and wherein if the first number is a highest number possible or the predetermined reverse ratio is higher than the desired reverse ratio, then a reverse mechanical gear which corresponds to the reverse gear ratio index is selected; andf) determining whether the ratio of the selected reverse mechanical gear is lower than the desired reverse ratio and if the ratio of the selected reverse mechanical gear is lower than the desired reverse ratio, controlling an engine speed command to the engine based on an engine rotation rate corresponding to an engine speed request from an operator, the gear ratio of the selected reverse mechanical gear, and the desired reverse ratio. 20. The method according to claim 19, wherein while the reverse gear ratio index is the highest number possible, identifying that the ratio of the selected reverse mechanical gear is higher than the desired reverse ratio and controlling the engine speed command to the engine based on an engine rotation rate corresponding to an engine speed request from an operator, the gear ratio of the selected reverse mechanical gear, and the desired reverse ratio.