Cadillac CTS rear differential failure, known defect with part availability issues on Cadillac CTS

Some Cadillac CTS owners report experiencing rear differential failures, particularly in the CTS-V and Vsport models, which have been highlighted for part shortages and mechanical issues. General Motors LLC has issued recalls for certain models due to these rear axle differential problems, offering free replacements to address the concerns. Additionally, owners note that proper maintenance is crucial, as fluid breakdown and incorrect fluid levels are major contributors to both rear differential and transmission failures. Despite the overall robustness of the rear differentials, some owners have identified them as a known weak link, with reports of unusual noises like whining or howling indicating potential issues. Awareness and regular maintenance can help Cadillac CTS owners mitigate these problems effectively.