transmission front row gear auto.

[Cherepakha]

Пожалуйста, помогите перевести: transmission front row gear.
Выражение встречается в следующем контексте: When it is unable to shift into the transmission front row gear, it indicates gears R, 1, 3, 5, 7 are fault, this is because the gear lever is not properly adjusted, when the front row gear is shifted too shallow, the rear row gear is shifted too deep, the fault can be cleared just by adjusting the gear lever length or moving the gear lever support, making the gear lever be between the front row gear and the rear row gear; if the front row gear is shifted too shallow, unable to shift into the reverse gear, and when gears 3, 7 are shifted , they are easy to be out-of mesh, at this time, we not only have to adjust the gear lever length, but also have to check the gear lever support for deformation.
Заранее спасибо