Main gear and drive shafts

Main gear: located with synchronizing transmission (differential) and manual or automatic transmission in one housing. The differential box also contains four meshed bevel gears, two of which are connected to the drive shafts.

Direct movement: both front wheels roll in sync with the final drive. The differential rotates at the same speed, the bevel gears in the differential box are stationary.

Turning movement: the outer wheel in relation to the turn makes a longer path than the inner one (speed difference). If the different rotations of the wheels are not synchronized, then the Focus will be poorly controlled and jerk through corners with the front wheel spinning in relation to the turn. This is prevented by bevel gears, in the differential case they provide the necessary synchronization: the faster-rotating bevel gear on the external drive shaft brakes, by means of both intermediate bevel gears, the bevel gear external to the rotation of the drive shaft. The desired speed difference cancels out the difference in distance traveled between the two front wheels.

Power transmission to the wheels (from synchronized transmission): although the gearbox housing is mounted offset from the vehicle's centerline, both drive shafts are the same length. The right drive shaft is driven from the gearbox output flange by an intermediate shaft.



Constant-velocity joint: constant velocity joints (SHRUS) allow you to get a comfortable transmission of torque to the drive wheels. Since they, unlike cardan joints, have fewer parts subject to wear, they are distinguished by great durability. On the gearbox side, the drive shafts in the Focus have tripod joints (with three-beam sprocket, support rollers and tripod bell), hinges of equal angular velocities are mounted on the side of the wheels (with spherical sprocket, ball bearing cage and spherical shell). CV joints have almost no drive effect on the steering wheel.

Drive shaft consoles: rotate from the side of the wheel in two ball bearings of the steering swivel bearing. In contrast to the fine spline profile on the wheel hub side, the fine spline profile on the gearbox side has a slight twist to prevent clicking noises at start-up.