I had an 04 SRT-4...it comes stock with a quaiffe lsd. I would say it is your other axle, if ur lsd was bad you wouldn't be able to drive the car probably. Oh BTW, you do have to add Mopar LSD Fluid to the tranny fluid, get it at the stealership its like 8-10$
Any more questions, I know a lot about these cars, my old SRT was 507whp and ran low 11's....let me know.