I'm wondering when auto coyote cars start seeing broken parts at the drag-strip with their stock differentials, and axles. On one hand, the shock to the rear in an auto car is probably next to nothing compared to a stick car, and the S197's all at least had 31 spline stuff from the factory instead of the 28 spline stuff from earlier generation Stangs. On the other hand it's always cheaper to upgrade instead of fixing broken parts and upgrading at the same time. I'm of the uneducated opinion that I'd be good with the stock rear axle internals until a trans-brake shows up in the picture, or single digit ET's start becoming a true possibility? When/if that day comes I know I liked the Trutrac diff that I had in my 04 Cobra, and would staying with 31 spline axles, but using aftermarket replacements be good enough? Thanks all.