Model ENG. Trans. Axle Ratio HSA Trak Pack
R/T 5.7L 6-speed** manual 3.73 LS Y Y
SRT8 6.1L 6-speed** manual 3.92 LS Y Y
LS = Limited Slip
Manual transmission versions of the 2009 Challenger R/T and SRT models will offer a feature that has previously only been available on the Dodge Ram, Jeep Commander, Grand Cherokee and the Liberty. The HSA feature assists the driver when starting a vehicle from a stop on a hill by maintaining the same level of brake pressure the driver applied for a short period of time after the foot has been removed from the brake pedal. The system will release the brake pedal in proportion to the amount of throttle applied. If the throttle is not applied within a short period of time after the foot has been removed from the brake pedal, Hill Start Assist will release brake pressure.
The second feature is called the Trak Pak, which is reportedly just a marketing term for a specific combination of transmission, shfiter and gearing. Available on R/T and SRT-8 models, the Tremec 6-speed manual is included, as well as a limited slip differential, though the axle ratio appears to vary between the two models on which the Trak Pak is included.
R/T 5.7L 6-speed** manual 3.73 LS Y Y
SRT8 6.1L 6-speed** manual 3.92 LS Y Y
LS = Limited Slip
Manual transmission versions of the 2009 Challenger R/T and SRT models will offer a feature that has previously only been available on the Dodge Ram, Jeep Commander, Grand Cherokee and the Liberty. The HSA feature assists the driver when starting a vehicle from a stop on a hill by maintaining the same level of brake pressure the driver applied for a short period of time after the foot has been removed from the brake pedal. The system will release the brake pedal in proportion to the amount of throttle applied. If the throttle is not applied within a short period of time after the foot has been removed from the brake pedal, Hill Start Assist will release brake pressure.
The second feature is called the Trak Pak, which is reportedly just a marketing term for a specific combination of transmission, shfiter and gearing. Available on R/T and SRT-8 models, the Tremec 6-speed manual is included, as well as a limited slip differential, though the axle ratio appears to vary between the two models on which the Trak Pak is included.