According to CarMax, more than 25% of vehicles sold in 1995 included a manual transmission ... four-wheel drive, heavy-duty ...

and the 4-speed manual common to most other high-level NASCAR cup series. Both of these transmissions must meet a far more rigorous standard of operation than a normal vehicle due to the constant ...

Four-wheel drive vehicles require another ... Gear oil is formulated specifically for heavy-duty metal-on-metal contact ...