* Bolt Pattern Mismatch: The most fundamental problem is the bolt pattern. The 2007 SRT8 uses a different wheel bolt pattern than the Dana 411. This means you'll need custom axles or extensive modification to the housing to even get wheels to mount.
* Axle Shaft Length and Configuration: The Dana 411 likely has different axle shaft lengths and configurations compared to the SRT8's original rear end. This necessitates custom axles, potentially requiring significant fabrication and potentially compromising strength and safety.
* Brake Integration: The 411 likely uses a different braking system. You'll have to figure out how to integrate it with the SRT8's braking system, potentially requiring new brake calipers, rotors, and possibly even the brake lines. This is a complex and potentially costly undertaking.
* Mounting and Suspension Geometry: The mounting points and suspension geometry of the 411 are unlikely to be directly compatible with the SRT8's chassis. This could lead to severe handling problems, poor ride quality, and potential damage to the car. Significant fabrication and modification would be necessary, likely requiring expertise in chassis fabrication and alignment.
* Electronic Integration: The SRT8's electronic systems (ABS, traction control, etc.) are likely calibrated for the original rear differential. Integrating a 411 would require extensive reprogramming or potentially disabling these safety features, making the vehicle less safe.
* Strength and Durability Concerns: The Dana 411 might not be designed to handle the power and torque output of the SRT8's engine. This could lead to premature failure of the rear end components, potentially resulting in dangerous situations.
In short, while theoretically *possible*, installing a Dana 411 rear end in a 2007 SRT8 is a massive undertaking that requires extensive fabrication, custom parts, and a deep understanding of automotive mechanics and engineering. It's highly impractical and would likely be more expensive and time-consuming than simply finding a suitable replacement for the original rear end. The risks associated with compromised safety and handling are very high. It's strongly advised against unless you're a highly skilled fabricator with significant experience in automotive engineering.
