The wide ratio spread delivers an aggressive first gear ratio of 4.71 for low - end performance and small gear ratio steps, which afford luxury - car levels of shift refinement. (greencarcongress.com)
Chevrolet says this results in a numerically higher first gear ratio, helping drivers start off the line more easily while carrying heavy loads. (automobilemag.com)
The greater performance and efficiency enabled by the available, GM - developed Hydra - Matic 8L90 eight - speed automatic is due primarily to its 7.0 overall gear ratio spread, which enhances off - the - line performance with a more aggressive first gear ratio — 4.56 vs. 4.03 on the six - speed — helping achieve the quicker 0 - 60 time. (theintelligentdriver.com)