[Venthos]

Just came across this now. It could very well be old news and since it's not an official spec sheet I guess it can only be taken as speculation at best. But I believe there was a lot of curiosity and debate about what years/trims were getting LSD and such. Many of you may already know this or this may not be a true confirmation, but I hadn't seen this and thought it was interesting.

Per AutoWeek's interviews: Inside the Dodge Challenger SRT8 - AutoWeek Magazine

Quoted from: Peter Gladysz, senior manager of SRT Powertrain

Originally Posted by Peter Gladysz

"For 2009, the Challenger will have the option of a six-speed manual gearbox and a limited-slip differential. The gearbox basically shares its heritage with the Viper, but we do change ratios in it, just because the engine size and the car weight are considerably different.

"It will share the same twin-disc clutch package as the Viper. That's for long-term durability, and also it gives the car kind of a smartness in shifter quality and clutch quality. Gone are the days when it takes two arms and two legs to push the clutch down on these high-torque cars. The twin-disc clutch basically allows that to be almost effortless.

"The '08 car doesn't have a true limited-slip; it has what we call brake-lock differential. It's an electronic version of a limited-slip. It works by slowing one wheel down to match the other wheel. But it doesn't really instantaneously put all of the power to the ground.

"So, on the '09, the limited-slip will make the car faster in autocross, really any kind of road-racing activity. Getrag is the manufacturer, but we're going back to buzzwords of the '60s and '70s, and it'll be called a Track-Loc.

"That will be on the 5.7 and the 6.1 manuals and on all of the SRT automatics. It's a very good package. It puts the power to the ground very effectively. It allows the owner of the car to really enjoy the experience.

"This car has a rear axle that's actually produced by Mercedes; it's the primary rear axle in all of their performance cars, with 215-millimeter ring gear. But for 2009, the ring gear goes up from 215 millimeters to 226 millimeters.

"You'd say, well, that's not a lot, but in torque durability, it goes up by the square, so the capability goes up quite a bit. And we get the limited-slip with it.

"The axle ratio in all of the automatics is 3.06:1, but for the manuals, we're going to have two ratios. On the 6.1, there will only be a 3.91 ratio, and on the 5.7, there'll be two packages, a 3.73 and a 3.91. The 3.91 gets different tires as well.