The accessory_transmission_data unit class is used to define the transmission characteristics for the player's vehicle, as well as the differential ratio. Units of this type are usually defined in /def/vehicle/truck/<make.model>/transmission/*.sii and valid unit names end in .transmission.
Attributes
Many common attributes are inherited from accessory_data.
| Name | Type | Default Value | Description |
|---|---|---|---|
| stall_torque_ratio | float | This defines the maximum torque multiplication of the torque converter for an automatic transmission. The torque output of the transmission is clamped to a maximum of (engine torque × gear ratio × stall_torque_ratio). That is, the output torque stops increasing once the output speed drops below (engine speed ÷ gear ratio ÷ stall_torque_ratio). If unset, the transmission behaves like a conventional transmission without a torque converter. | |
| differential_ratio | float | This defines the differential/final drive ratio between the transmission output shaft and the wheels. | |
| retarder | uint | 0 | The number of output levels for the retarder if applicable. If zero, retarder behavior is disabled for the transmission. |
| ratios_reverse | float_array | This defines the reverse gear ratios in order of decreasing gear reduction. The values should be negative. Example:
ratios_reverse[0]: -11.002 ratios_reverse[1]: -8.875 | |
| ratios_forward | float_array | This defines the forward gear ratios in order of decreasing gear reduction. The values should be positive. Example:
ratios_forward[0]: 11.32 ratios_forward[1]: 9.132 ratios_forward[2]: 7.207 ...etc... | |
| transmission_names | owner_ptr | Points to a unit of the type transmission_names, usually nameless and within the same unit definition file or included from a Serialized Unit Include (.sui) type file. This is used to assign custom names to each gear in automatic and sequential modes (these are overridden by h-shifter pattern definitions). |
Raw Unit Definition
"accessory_transmission_data":{
"superclass":"accessory_data",
"attrs":{
"name":{
"type": "string"
},
"short_name":{
"type": "string"
},
"icon":{
"type": "string"
},
"info":{
"type": "string_array"
},
"price":{
"type": "s64"
},
"unlock":{
"type": "uint"
},
"suitable_for":{
"type": "string_array"
},
"conflict_with":{
"type": "string_array"
},
"defaults":{
"type": "string_array"
},
"require":{
"type": "token_array"
},
"stall_torque_ratio":{
"type": "float"
},
"differential_ratio":{
"type": "float"
},
"retarder":{
"type": "uint"
},
"ratios_reverse":{
"type": "float_array"
},
"ratios_forward":{
"type": "float_array"
},
"transmission_names":{
"type": "owner_ptr"
}
}
},