The weaker hollow axles (a.k.a. half shafts) were carried over from the Gen 3 production line...they had some unknown number of them left over from the Gen 3 builds that were used during the 2008 production run until they ran out at some point. My car was an early 2008 build, and it had the hollow Gen 3 axles. Some with later 2008 builds also reported having the hollow shafts, but at some point they switched over to the stronger, solid "double hump" design. When that was, I have no idea, but I'm under the impression that the 2009 and 2010 cars should all have come with the solid axles. Both designs can be seen in this thread here:
https://driveviper.com/forums/thread...er-CV-Question
I was going to replace my shitty OEM axles with the stronger Mopar solid axles until I realized I could get a set of much stronger aftermarket axles for less than what they wanted for the Mopar units. The hollow axles were a known weak point, and there were quite a few reported failures, some of which weren't even during drag racing where you would expect them to fail. I wasn't taking any chances with mine.
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