A Family Medical History Filled With Diabetes, Heart Disease, and Cancer. As a young adult, I witnessed my beloved mother, the rock of our family, battle type 2 diabetes and the complications that come with it. She suffered from kidney failure, vision problems, and heart disease. After 33 years of fighting diabetes, she passed away in April of 2002. I miss her dearly.
Generally speaking, overdrive is the highest gear in the transmission. Overdrive allows the engine to operate at a lower RPM for a given road speed. This allows the vehicle to achieve better fuel efficiency, and often quieter operation on the highway.
Direct Drive or Overdrive? Thereâs no single answer to this age-old debate The long-running debate over which type of transmission - direct drive or overdrive - provides the greatest efficiency is one thatâs not easily settled and not likely to go away. Conventional wisdom suggests direct drive transmissions, with their ability to transmit power directly through the main shaft with minimal parasitic losses, should be more efficient - and sometimes thatâs true.