- All 09-15 CTS-V axles are designed to work with the factory 31 spline differential and 33 spline wheel hubs.
- The required design and smaller spline count on the inner differential stub relative to the weight and torque of the vehicle generally makes this the weak point. We changed this over to a stronger alloy material to help increase the strength to withstand more torque. Where customers were previously hurting inner stubs around 800-850hp, they are now running without issue. Important to note that any axle can fail at a lower power level due to wheel hop or misuse. The listed numbers should not be an expectation, but an idea for capability.
- The 09-15 CTS-V factory rear end has been all over the place in terms of reliability. There is a higher number of lower hp failures on this platform than any other that we deal with, with a handful of end customers being the exception. Having said that; If you are giving any consideration to drag racing and looking for a reliable setup, we suggest that you consider looking at a 9” conversion.
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